*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
+ * http://www.gnu.org/licenses/gpl-2.0.html
*
* GPL HEADER END
*/
* Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
- * Copyright (c) 2011, 2012, Whamcloud, Inc.
+ * Copyright (c) 2011, 2017, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
- * Lustre is a trademark of Sun Microsystems, Inc.
*
* Lustre Unified Target
* These are common function to work with last_received file
#include "tgt_internal.h"
+/** version recovery epoch */
+#define LR_EPOCH_BITS 32
+
+/* Allocate a bitmap for a chunk of reply data slots */
+static int tgt_bitmap_chunk_alloc(struct lu_target *lut, int chunk)
+{
+ unsigned long *bm;
+
+ OBD_ALLOC_LARGE(bm, BITS_TO_LONGS(LUT_REPLY_SLOTS_PER_CHUNK) *
+ sizeof(long));
+ if (bm == NULL)
+ return -ENOMEM;
+
+ spin_lock(&lut->lut_client_bitmap_lock);
+
+ if (lut->lut_reply_bitmap[chunk] != NULL) {
+ /* someone else already allocated the bitmap for this chunk */
+ spin_unlock(&lut->lut_client_bitmap_lock);
+ OBD_FREE_LARGE(bm, BITS_TO_LONGS(LUT_REPLY_SLOTS_PER_CHUNK) *
+ sizeof(long));
+ return 0;
+ }
+
+ lut->lut_reply_bitmap[chunk] = bm;
+
+ spin_unlock(&lut->lut_client_bitmap_lock);
+
+ return 0;
+}
+
+/* Look for an available reply data slot in the bitmap
+ * of the target @lut
+ * Allocate bitmap chunk when first used
+ * XXX algo could be improved if this routine limits performance
+ */
+static int tgt_find_free_reply_slot(struct lu_target *lut)
+{
+ unsigned long *bmp;
+ int chunk = 0;
+ int rc;
+ int b;
+
+ for (chunk = 0; chunk < LUT_REPLY_SLOTS_MAX_CHUNKS; chunk++) {
+ /* allocate the bitmap chunk if necessary */
+ if (unlikely(lut->lut_reply_bitmap[chunk] == NULL)) {
+ rc = tgt_bitmap_chunk_alloc(lut, chunk);
+ if (rc != 0)
+ return rc;
+ }
+ bmp = lut->lut_reply_bitmap[chunk];
+
+ /* look for an available slot in this chunk */
+ do {
+ b = find_first_zero_bit(bmp, LUT_REPLY_SLOTS_PER_CHUNK);
+ if (b >= LUT_REPLY_SLOTS_PER_CHUNK)
+ break;
+
+ /* found one */
+ if (test_and_set_bit(b, bmp) == 0)
+ return chunk * LUT_REPLY_SLOTS_PER_CHUNK + b;
+ } while (true);
+ }
+
+ return -ENOSPC;
+}
+
+/* Mark the reply data slot @idx 'used' in the corresponding bitmap chunk
+ * of the target @lut
+ * Allocate the bitmap chunk if necessary
+ */
+static int tgt_set_reply_slot(struct lu_target *lut, int idx)
+{
+ int chunk;
+ int b;
+ int rc;
+
+ chunk = idx / LUT_REPLY_SLOTS_PER_CHUNK;
+ b = idx % LUT_REPLY_SLOTS_PER_CHUNK;
+
+ LASSERT(chunk < LUT_REPLY_SLOTS_MAX_CHUNKS);
+ LASSERT(b < LUT_REPLY_SLOTS_PER_CHUNK);
+
+ /* allocate the bitmap chunk if necessary */
+ if (unlikely(lut->lut_reply_bitmap[chunk] == NULL)) {
+ rc = tgt_bitmap_chunk_alloc(lut, chunk);
+ if (rc != 0)
+ return rc;
+ }
+
+ /* mark the slot 'used' in this chunk */
+ if (test_and_set_bit(b, lut->lut_reply_bitmap[chunk]) != 0) {
+ CERROR("%s: slot %d already set in bitmap\n",
+ tgt_name(lut), idx);
+ return -EALREADY;
+ }
+
+ return 0;
+}
+
+
+/* Mark the reply data slot @idx 'unused' in the corresponding bitmap chunk
+ * of the target @lut
+ */
+static int tgt_clear_reply_slot(struct lu_target *lut, int idx)
+{
+ int chunk;
+ int b;
+
+ if (lut->lut_obd->obd_stopping)
+ /*
+ * in case of failover keep the bit set in order to
+ * avoid overwriting slots in reply_data which might
+ * be required by resent rpcs
+ */
+ return 0;
+ chunk = idx / LUT_REPLY_SLOTS_PER_CHUNK;
+ b = idx % LUT_REPLY_SLOTS_PER_CHUNK;
+
+ LASSERT(chunk < LUT_REPLY_SLOTS_MAX_CHUNKS);
+ LASSERT(b < LUT_REPLY_SLOTS_PER_CHUNK);
+
+ if (lut->lut_reply_bitmap[chunk] == NULL) {
+ CERROR("%s: slot %d not allocated\n",
+ tgt_name(lut), idx);
+ return -ENOENT;
+ }
+
+ if (test_and_clear_bit(b, lut->lut_reply_bitmap[chunk]) == 0) {
+ CERROR("%s: slot %d already clear in bitmap\n",
+ tgt_name(lut), idx);
+ return -EALREADY;
+ }
+
+ return 0;
+}
+
+
+/* Read header of reply_data file of target @tgt into structure @lrh */
+static int tgt_reply_header_read(const struct lu_env *env,
+ struct lu_target *tgt,
+ struct lsd_reply_header *lrh)
+{
+ int rc;
+ struct lsd_reply_header buf;
+ struct tgt_thread_info *tti = tgt_th_info(env);
+
+ tti->tti_off = 0;
+ tti->tti_buf.lb_buf = &buf;
+ tti->tti_buf.lb_len = sizeof(buf);
+
+ rc = dt_record_read(env, tgt->lut_reply_data, &tti->tti_buf,
+ &tti->tti_off);
+ if (rc != 0)
+ return rc;
+
+ lrh->lrh_magic = le32_to_cpu(buf.lrh_magic);
+ lrh->lrh_header_size = le32_to_cpu(buf.lrh_header_size);
+ lrh->lrh_reply_size = le32_to_cpu(buf.lrh_reply_size);
+
+ CDEBUG(D_HA, "%s: read %s header. magic=0x%08x "
+ "header_size=%d reply_size=%d\n",
+ tgt->lut_obd->obd_name, REPLY_DATA,
+ lrh->lrh_magic, lrh->lrh_header_size, lrh->lrh_reply_size);
+
+ return 0;
+}
+
+/* Write header into replay_data file of target @tgt from structure @lrh */
+static int tgt_reply_header_write(const struct lu_env *env,
+ struct lu_target *tgt,
+ struct lsd_reply_header *lrh)
+{
+ int rc;
+ struct lsd_reply_header buf;
+ struct tgt_thread_info *tti = tgt_th_info(env);
+ struct thandle *th;
+ struct dt_object *dto;
+
+ CDEBUG(D_HA, "%s: write %s header. magic=0x%08x "
+ "header_size=%d reply_size=%d\n",
+ tgt->lut_obd->obd_name, REPLY_DATA,
+ lrh->lrh_magic, lrh->lrh_header_size, lrh->lrh_reply_size);
+
+ if (tgt->lut_bottom->dd_rdonly)
+ RETURN(0);
+
+ buf.lrh_magic = cpu_to_le32(lrh->lrh_magic);
+ buf.lrh_header_size = cpu_to_le32(lrh->lrh_header_size);
+ buf.lrh_reply_size = cpu_to_le32(lrh->lrh_reply_size);
+
+ th = dt_trans_create(env, tgt->lut_bottom);
+ if (IS_ERR(th))
+ return PTR_ERR(th);
+ th->th_sync = 1;
+
+ tti->tti_off = 0;
+ tti->tti_buf.lb_buf = &buf;
+ tti->tti_buf.lb_len = sizeof(buf);
+
+ rc = dt_declare_record_write(env, tgt->lut_reply_data,
+ &tti->tti_buf, tti->tti_off, th);
+ if (rc)
+ GOTO(out, rc);
+
+ rc = dt_trans_start(env, tgt->lut_bottom, th);
+ if (rc)
+ GOTO(out, rc);
+
+ dto = dt_object_locate(tgt->lut_reply_data, th->th_dev);
+ rc = dt_record_write(env, dto, &tti->tti_buf, &tti->tti_off, th);
+out:
+ dt_trans_stop(env, tgt->lut_bottom, th);
+ return rc;
+}
+
+/* Write the reply data @lrd into reply_data file of target @tgt
+ * at offset @off
+ */
+static int tgt_reply_data_write(const struct lu_env *env, struct lu_target *tgt,
+ struct lsd_reply_data *lrd, loff_t off,
+ struct thandle *th)
+{
+ struct tgt_thread_info *tti = tgt_th_info(env);
+ struct lsd_reply_data *buf = &tti->tti_lrd;
+ struct lsd_reply_header *lrh = &tgt->lut_reply_header;
+ struct dt_object *dto;
+
+ lrd->lrd_result = ptlrpc_status_hton(lrd->lrd_result);
+
+ buf->lrd_transno = cpu_to_le64(lrd->lrd_transno);
+ buf->lrd_xid = cpu_to_le64(lrd->lrd_xid);
+ buf->lrd_data = cpu_to_le64(lrd->lrd_data);
+ buf->lrd_result = cpu_to_le32(lrd->lrd_result);
+ buf->lrd_client_gen = cpu_to_le32(lrd->lrd_client_gen);
+
+ lrd->lrd_result = ptlrpc_status_ntoh(lrd->lrd_result);
+
+ if (lrh->lrh_magic > LRH_MAGIC_V1)
+ buf->lrd_batch_idx = cpu_to_le32(lrd->lrd_batch_idx);
+
+ tti->tti_off = off;
+ tti->tti_buf.lb_buf = buf;
+ tti->tti_buf.lb_len = lrh->lrh_reply_size;
+
+ dto = dt_object_locate(tgt->lut_reply_data, th->th_dev);
+ return dt_record_write(env, dto, &tti->tti_buf, &tti->tti_off, th);
+}
+
+/* Read the reply data from reply_data file of target @tgt at offset @off
+ * into structure @lrd
+ */
+static int tgt_reply_data_read(const struct lu_env *env, struct lu_target *tgt,
+ struct lsd_reply_data *lrd, loff_t off,
+ struct lsd_reply_header *lrh)
+{
+ struct tgt_thread_info *tti = tgt_th_info(env);
+ struct lsd_reply_data *buf = &tti->tti_lrd;
+ int rc;
+
+ tti->tti_off = off;
+ tti->tti_buf.lb_buf = buf;
+ tti->tti_buf.lb_len = lrh->lrh_reply_size;
+
+ rc = dt_record_read(env, tgt->lut_reply_data, &tti->tti_buf,
+ &tti->tti_off);
+ if (rc != 0)
+ return rc;
+
+ lrd->lrd_transno = le64_to_cpu(buf->lrd_transno);
+ lrd->lrd_xid = le64_to_cpu(buf->lrd_xid);
+ lrd->lrd_data = le64_to_cpu(buf->lrd_data);
+ lrd->lrd_result = le32_to_cpu(buf->lrd_result);
+ lrd->lrd_client_gen = le32_to_cpu(buf->lrd_client_gen);
+
+ if (lrh->lrh_magic > LRH_MAGIC_V1)
+ lrd->lrd_batch_idx = le32_to_cpu(buf->lrd_batch_idx);
+ else
+ lrd->lrd_batch_idx = 0;
+
+ return 0;
+}
+
+/* Free the in-memory reply data structure @trd and release
+ * the corresponding slot in the reply_data file of target @lut
+ * Called with ted_lcd_lock held
+ */
+static void tgt_free_reply_data(struct lu_target *lut,
+ struct tg_export_data *ted,
+ struct tg_reply_data *trd)
+{
+ CDEBUG(D_TRACE, "%s: free reply data %p: xid %llu, transno %llu, "
+ "client gen %u, slot idx %d\n",
+ lut == NULL ? "" : tgt_name(lut), trd, trd->trd_reply.lrd_xid,
+ trd->trd_reply.lrd_transno, trd->trd_reply.lrd_client_gen,
+ trd->trd_index);
+
+ LASSERT(mutex_is_locked(&ted->ted_lcd_lock));
+
+ list_del(&trd->trd_list);
+ ted->ted_reply_cnt--;
+ if (lut != NULL && trd->trd_index != TRD_INDEX_MEMORY)
+ tgt_clear_reply_slot(lut, trd->trd_index);
+ OBD_FREE_PTR(trd);
+}
+
+/* Release the reply data @trd from target @lut
+ * The reply data with the highest transno for this export
+ * is retained to ensure correctness of target recovery
+ * Called with ted_lcd_lock held
+ */
+static void tgt_release_reply_data(struct lu_target *lut,
+ struct tg_export_data *ted,
+ struct tg_reply_data *trd)
+{
+ CDEBUG(D_TRACE, "%s: release reply data %p: xid %llu, transno %llu, "
+ "client gen %u, slot idx %d\n",
+ lut == NULL ? "" : tgt_name(lut), trd, trd->trd_reply.lrd_xid,
+ trd->trd_reply.lrd_transno, trd->trd_reply.lrd_client_gen,
+ trd->trd_index);
+
+ LASSERT(mutex_is_locked(&ted->ted_lcd_lock));
+
+ /* Do not free the reply data corresponding to the
+ * highest transno of this export.
+ * This ensures on-disk reply data is kept and
+ * last committed transno can be restored from disk in case
+ * of target recovery
+ */
+ if (trd->trd_reply.lrd_transno == ted->ted_lcd->lcd_last_transno) {
+ /* free previous retained reply */
+ if (ted->ted_reply_last != NULL)
+ tgt_free_reply_data(lut, ted, ted->ted_reply_last);
+ /* retain the reply */
+ list_del_init(&trd->trd_list);
+ ted->ted_reply_last = trd;
+ } else {
+ tgt_free_reply_data(lut, ted, trd);
+ }
+}
+
static inline struct lu_buf *tti_buf_lsd(struct tgt_thread_info *tti)
{
tti->tti_buf.lb_buf = &tti->tti_lsd;
return &tti->tti_buf;
}
+static inline bool tgt_is_multimodrpcs_record(struct lu_target *tgt,
+ struct lsd_client_data *lcd)
+{
+ return tgt->lut_lsd.lsd_feature_incompat & OBD_INCOMPAT_MULTI_RPCS &&
+ lcd->lcd_generation != 0;
+}
+
/**
* Allocate in-memory data for client slot related to export.
*/
-int lut_client_alloc(struct obd_export *exp)
+int tgt_client_alloc(struct obd_export *exp)
{
- LASSERT(exp != exp->exp_obd->obd_self_export);
-
- OBD_ALLOC_PTR(exp->exp_target_data.ted_lcd);
- if (exp->exp_target_data.ted_lcd == NULL)
- RETURN(-ENOMEM);
- /* Mark that slot is not yet valid, 0 doesn't work here */
- exp->exp_target_data.ted_lr_idx = -1;
- RETURN(0);
+ ENTRY;
+ LASSERT(exp != exp->exp_obd->obd_self_export);
+
+ spin_lock_init(&exp->exp_target_data.ted_nodemap_lock);
+ INIT_LIST_HEAD(&exp->exp_target_data.ted_nodemap_member);
+ spin_lock_init(&exp->exp_target_data.ted_fmd_lock);
+ INIT_LIST_HEAD(&exp->exp_target_data.ted_fmd_list);
+
+ OBD_ALLOC_PTR(exp->exp_target_data.ted_lcd);
+ if (exp->exp_target_data.ted_lcd == NULL)
+ RETURN(-ENOMEM);
+ /* Mark that slot is not yet valid, 0 doesn't work here */
+ exp->exp_target_data.ted_lr_idx = -1;
+ INIT_LIST_HEAD(&exp->exp_target_data.ted_reply_list);
+ mutex_init(&exp->exp_target_data.ted_lcd_lock);
+ RETURN(0);
}
-EXPORT_SYMBOL(lut_client_alloc);
+EXPORT_SYMBOL(tgt_client_alloc);
/**
* Free in-memory data for client slot related to export.
*/
-void lut_client_free(struct obd_export *exp)
+void tgt_client_free(struct obd_export *exp)
{
- struct tg_export_data *ted = &exp->exp_target_data;
- struct lu_target *lut = class_exp2tgt(exp);
+ struct tg_export_data *ted = &exp->exp_target_data;
+ struct lu_target *lut = class_exp2tgt(exp);
+ struct tg_reply_data *trd, *tmp;
- LASSERT(exp != exp->exp_obd->obd_self_export);
+ LASSERT(exp != exp->exp_obd->obd_self_export);
- OBD_FREE_PTR(ted->ted_lcd);
- ted->ted_lcd = NULL;
+ tgt_fmd_cleanup(exp);
- /* Slot may be not yet assigned */
- if (ted->ted_lr_idx < 0)
- return;
- /* Clear bit when lcd is freed */
- LASSERT(lut->lut_client_bitmap);
- if (!cfs_test_and_clear_bit(ted->ted_lr_idx, lut->lut_client_bitmap)) {
- CERROR("%s: client %u bit already clear in bitmap\n",
- exp->exp_obd->obd_name, ted->ted_lr_idx);
- LBUG();
- }
+ /* free reply data */
+ mutex_lock(&ted->ted_lcd_lock);
+ list_for_each_entry_safe(trd, tmp, &ted->ted_reply_list, trd_list) {
+ tgt_release_reply_data(lut, ted, trd);
+ }
+ if (ted->ted_reply_last != NULL) {
+ tgt_free_reply_data(lut, ted, ted->ted_reply_last);
+ ted->ted_reply_last = NULL;
+ }
+ mutex_unlock(&ted->ted_lcd_lock);
+
+ if (!hlist_unhashed(&exp->exp_gen_hash))
+ cfs_hash_del(exp->exp_obd->obd_gen_hash,
+ &ted->ted_lcd->lcd_generation,
+ &exp->exp_gen_hash);
+
+ OBD_FREE_PTR(ted->ted_lcd);
+ ted->ted_lcd = NULL;
+
+ /* Target may have been freed (see LU-7430)
+ * Slot may be not yet assigned */
+ if (((struct obd_device_target *)(&exp->exp_obd->u))->obt_magic !=
+ OBT_MAGIC ||
+ ted->ted_lr_idx < 0)
+ return;
+
+ /* Clear bit when lcd is freed */
+ LASSERT(lut && lut->lut_client_bitmap);
+ if (!test_and_clear_bit(ted->ted_lr_idx, lut->lut_client_bitmap)) {
+ CERROR("%s: client %u bit already clear in bitmap\n",
+ exp->exp_obd->obd_name, ted->ted_lr_idx);
+ LBUG();
+ }
}
-EXPORT_SYMBOL(lut_client_free);
+EXPORT_SYMBOL(tgt_client_free);
-int lut_client_data_read(const struct lu_env *env, struct lu_target *tg,
- struct lsd_client_data *lcd, loff_t *off, int index)
+static inline void tgt_check_lcd(const char *obd_name, int index,
+ struct lsd_client_data *lcd)
{
- struct tgt_thread_info *tti = tgt_th_info(env);
- int rc;
+ size_t uuid_size = sizeof(lcd->lcd_uuid);
+
+ if (strnlen((char*)lcd->lcd_uuid, uuid_size) == uuid_size) {
+ lcd->lcd_uuid[uuid_size - 1] = '\0';
+
+ LCONSOLE_ERROR("the client UUID (%s) on %s for exports stored in last_rcvd(index = %d) is bad!\n",
+ lcd->lcd_uuid, obd_name, index);
+ }
+}
+
+static int tgt_client_data_read(const struct lu_env *env, struct lu_target *tgt,
+ struct lsd_client_data *lcd,
+ loff_t *off, int index)
+{
+ struct tgt_thread_info *tti = tgt_th_info(env);
+ int rc;
tti_buf_lcd(tti);
- rc = dt_record_read(env, tg->lut_last_rcvd, &tti->tti_buf, off);
+ rc = dt_record_read(env, tgt->lut_last_rcvd, &tti->tti_buf, off);
if (rc == 0) {
- check_lcd(tg->lut_obd->obd_name, index, &tti->tti_lcd);
+ tgt_check_lcd(tgt->lut_obd->obd_name, index, &tti->tti_lcd);
lcd_le_to_cpu(&tti->tti_lcd, lcd);
+ lcd->lcd_last_result = ptlrpc_status_ntoh(lcd->lcd_last_result);
+ lcd->lcd_last_close_result =
+ ptlrpc_status_ntoh(lcd->lcd_last_close_result);
}
- CDEBUG(D_INFO, "%s: read lcd @%lld uuid = %s, last_transno = "LPU64
- ", last_xid = "LPU64", last_result = %u, last_data = %u, "
- "last_close_transno = "LPU64", last_close_xid = "LPU64", "
- "last_close_result = %u, rc = %d\n", tg->lut_obd->obd_name,
+ CDEBUG(D_INFO, "%s: read lcd @%lld uuid = %s, last_transno = %llu"
+ ", last_xid = %llu, last_result = %u, last_data = %u, "
+ "last_close_transno = %llu, last_close_xid = %llu, "
+ "last_close_result = %u, rc = %d\n", tgt->lut_obd->obd_name,
*off, lcd->lcd_uuid, lcd->lcd_last_transno, lcd->lcd_last_xid,
lcd->lcd_last_result, lcd->lcd_last_data,
lcd->lcd_last_close_transno, lcd->lcd_last_close_xid,
lcd->lcd_last_close_result, rc);
return rc;
}
-EXPORT_SYMBOL(lut_client_data_read);
-int lut_client_data_write(const struct lu_env *env, struct lu_target *tg,
- struct lsd_client_data *lcd, loff_t *off,
- struct thandle *th)
+static int tgt_client_data_write(const struct lu_env *env,
+ struct lu_target *tgt,
+ struct lsd_client_data *lcd,
+ loff_t *off, struct thandle *th)
{
struct tgt_thread_info *tti = tgt_th_info(env);
+ struct dt_object *dto;
+ lcd->lcd_last_result = ptlrpc_status_hton(lcd->lcd_last_result);
+ lcd->lcd_last_close_result =
+ ptlrpc_status_hton(lcd->lcd_last_close_result);
lcd_cpu_to_le(lcd, &tti->tti_lcd);
tti_buf_lcd(tti);
- return dt_record_write(env, tg->lut_last_rcvd, &tti->tti_buf, off, th);
+ dto = dt_object_locate(tgt->lut_last_rcvd, th->th_dev);
+ return dt_record_write(env, dto, &tti->tti_buf, off, th);
+}
+
+struct tgt_new_client_callback {
+ struct dt_txn_commit_cb lncc_cb;
+ struct obd_export *lncc_exp;
+};
+
+static void tgt_cb_new_client(struct lu_env *env, struct thandle *th,
+ struct dt_txn_commit_cb *cb, int err)
+{
+ struct tgt_new_client_callback *ccb;
+
+ ccb = container_of(cb, struct tgt_new_client_callback, lncc_cb);
+
+ LASSERT(ccb->lncc_exp->exp_obd);
+
+ CDEBUG(D_RPCTRACE, "%s: committing for initial connect of %s\n",
+ ccb->lncc_exp->exp_obd->obd_name,
+ ccb->lncc_exp->exp_client_uuid.uuid);
+
+ spin_lock(&ccb->lncc_exp->exp_lock);
+
+ ccb->lncc_exp->exp_need_sync = 0;
+
+ spin_unlock(&ccb->lncc_exp->exp_lock);
+ class_export_cb_put(ccb->lncc_exp);
+
+ OBD_FREE_PTR(ccb);
+}
+
+static int tgt_new_client_cb_add(struct thandle *th, struct obd_export *exp)
+{
+ struct tgt_new_client_callback *ccb;
+ struct dt_txn_commit_cb *dcb;
+ int rc;
+
+ OBD_ALLOC_PTR(ccb);
+ if (ccb == NULL)
+ return -ENOMEM;
+
+ ccb->lncc_exp = class_export_cb_get(exp);
+
+ dcb = &ccb->lncc_cb;
+ dcb->dcb_func = tgt_cb_new_client;
+ INIT_LIST_HEAD(&dcb->dcb_linkage);
+ strlcpy(dcb->dcb_name, "tgt_cb_new_client", sizeof(dcb->dcb_name));
+
+ rc = dt_trans_cb_add(th, dcb);
+ if (rc) {
+ class_export_cb_put(exp);
+ OBD_FREE_PTR(ccb);
+ }
+ return rc;
}
-EXPORT_SYMBOL(lut_client_data_write);
/**
* Update client data in last_rcvd
*/
-int lut_client_data_update(const struct lu_env *env, struct obd_export *exp)
+static int tgt_client_data_update(const struct lu_env *env,
+ struct obd_export *exp)
{
- struct tg_export_data *ted = &exp->exp_target_data;
- struct lu_target *tg = class_exp2tgt(exp);
- struct tgt_thread_info *tti = tgt_th_info(env);
- struct thandle *th;
- int rc = 0;
+ struct tg_export_data *ted = &exp->exp_target_data;
+ struct lu_target *tgt = class_exp2tgt(exp);
+ struct tgt_thread_info *tti = tgt_th_info(env);
+ struct thandle *th;
+ int rc = 0;
ENTRY;
- th = dt_trans_create(env, tg->lut_bottom);
+ if (unlikely(tgt == NULL)) {
+ CDEBUG(D_ERROR, "%s: No target for connected export\n",
+ class_exp2obd(exp)->obd_name);
+ RETURN(-EINVAL);
+ }
+
+ if (tgt->lut_bottom->dd_rdonly)
+ RETURN(0);
+
+ th = dt_trans_create(env, tgt->lut_bottom);
if (IS_ERR(th))
RETURN(PTR_ERR(th));
- rc = dt_declare_record_write(env, tg->lut_last_rcvd,
- sizeof(struct lsd_client_data),
+ tti_buf_lcd(tti);
+ rc = dt_declare_record_write(env, tgt->lut_last_rcvd,
+ &tti->tti_buf,
ted->ted_lr_off, th);
if (rc)
GOTO(out, rc);
- rc = dt_trans_start_local(env, tg->lut_bottom, th);
+ rc = dt_trans_start_local(env, tgt->lut_bottom, th);
if (rc)
GOTO(out, rc);
+
+ mutex_lock(&ted->ted_lcd_lock);
+
/*
* Until this operations will be committed the sync is needed
* for this export. This should be done _after_ starting the
* transaction so that many connecting clients will not bring
* server down with lots of sync writes.
*/
- rc = lut_new_client_cb_add(th, exp);
+ rc = tgt_new_client_cb_add(th, exp);
if (rc) {
/* can't add callback, do sync now */
th->th_sync = 1;
} else {
- cfs_spin_lock(&exp->exp_lock);
+ spin_lock(&exp->exp_lock);
exp->exp_need_sync = 1;
- cfs_spin_unlock(&exp->exp_lock);
+ spin_unlock(&exp->exp_lock);
}
tti->tti_off = ted->ted_lr_off;
- rc = lut_client_data_write(env, tg, ted->ted_lcd, &tti->tti_off, th);
+ rc = tgt_client_data_write(env, tgt, ted->ted_lcd, &tti->tti_off, th);
+
+ mutex_unlock(&ted->ted_lcd_lock);
+
EXIT;
out:
- dt_trans_stop(env, tg->lut_bottom, th);
+ dt_trans_stop(env, tgt->lut_bottom, th);
CDEBUG(D_INFO, "%s: update last_rcvd client data for UUID = %s, "
- "last_transno = "LPU64": rc = %d\n", tg->lut_obd->obd_name,
- tg->lut_lsd.lsd_uuid, tg->lut_lsd.lsd_last_transno, rc);
+ "last_transno = %llu: rc = %d\n", tgt->lut_obd->obd_name,
+ tgt->lut_lsd.lsd_uuid, tgt->lut_lsd.lsd_last_transno, rc);
return rc;
}
-int lut_server_data_read(const struct lu_env *env, struct lu_target *tg)
+static int tgt_server_data_read(const struct lu_env *env, struct lu_target *tgt)
{
- struct tgt_thread_info *tti = tgt_th_info(env);
- int rc;
+ struct tgt_thread_info *tti = tgt_th_info(env);
+ int rc;
tti->tti_off = 0;
tti_buf_lsd(tti);
- rc = dt_record_read(env, tg->lut_last_rcvd, &tti->tti_buf, &tti->tti_off);
+ rc = dt_record_read(env, tgt->lut_last_rcvd, &tti->tti_buf,
+ &tti->tti_off);
if (rc == 0)
- lsd_le_to_cpu(&tti->tti_lsd, &tg->lut_lsd);
+ lsd_le_to_cpu(&tti->tti_lsd, &tgt->lut_lsd);
CDEBUG(D_INFO, "%s: read last_rcvd server data for UUID = %s, "
- "last_transno = "LPU64": rc = %d\n", tg->lut_obd->obd_name,
- tg->lut_lsd.lsd_uuid, tg->lut_lsd.lsd_last_transno, rc);
+ "last_transno = %llu: rc = %d\n", tgt->lut_obd->obd_name,
+ tgt->lut_lsd.lsd_uuid, tgt->lut_lsd.lsd_last_transno, rc);
return rc;
}
-EXPORT_SYMBOL(lut_server_data_read);
-int lut_server_data_write(const struct lu_env *env, struct lu_target *tg,
- struct thandle *th)
+static int tgt_server_data_write(const struct lu_env *env,
+ struct lu_target *tgt, struct thandle *th)
{
- struct tgt_thread_info *tti = tgt_th_info(env);
- int rc;
+ struct tgt_thread_info *tti = tgt_th_info(env);
+ struct dt_object *dto;
+ int rc;
+
ENTRY;
tti->tti_off = 0;
tti_buf_lsd(tti);
- lsd_cpu_to_le(&tg->lut_lsd, &tti->tti_lsd);
+ lsd_cpu_to_le(&tgt->lut_lsd, &tti->tti_lsd);
- rc = dt_record_write(env, tg->lut_last_rcvd, &tti->tti_buf,
- &tti->tti_off, th);
+ dto = dt_object_locate(tgt->lut_last_rcvd, th->th_dev);
+ rc = dt_record_write(env, dto, &tti->tti_buf, &tti->tti_off, th);
CDEBUG(D_INFO, "%s: write last_rcvd server data for UUID = %s, "
- "last_transno = "LPU64": rc = %d\n", tg->lut_obd->obd_name,
- tg->lut_lsd.lsd_uuid, tg->lut_lsd.lsd_last_transno, rc);
+ "last_transno = %llu: rc = %d\n", tgt->lut_obd->obd_name,
+ tgt->lut_lsd.lsd_uuid, tgt->lut_lsd.lsd_last_transno, rc);
RETURN(rc);
}
-EXPORT_SYMBOL(lut_server_data_write);
/**
* Update server data in last_rcvd
*/
-int lut_server_data_update(const struct lu_env *env, struct lu_target *tg,
+int tgt_server_data_update(const struct lu_env *env, struct lu_target *tgt,
int sync)
{
- struct tgt_thread_info *tti = tgt_th_info(env);
- struct thandle *th;
- int rc = 0;
+ struct tgt_thread_info *tti = tgt_th_info(env);
+ struct thandle *th;
+ int rc = 0;
ENTRY;
CDEBUG(D_SUPER,
- "%s: mount_count is "LPU64", last_transno is "LPU64"\n",
- tg->lut_lsd.lsd_uuid, tg->lut_obd->u.obt.obt_mount_count,
- tg->lut_last_transno);
+ "%s: mount_count is %llu, last_transno is %llu\n",
+ tgt->lut_lsd.lsd_uuid, obd2obt(tgt->lut_obd)->obt_mount_count,
+ tgt->lut_last_transno);
/* Always save latest transno to keep it fresh */
- cfs_spin_lock(&tg->lut_translock);
- tg->lut_lsd.lsd_last_transno = tg->lut_last_transno;
- cfs_spin_unlock(&tg->lut_translock);
+ spin_lock(&tgt->lut_translock);
+ tgt->lut_lsd.lsd_last_transno = tgt->lut_last_transno;
+ spin_unlock(&tgt->lut_translock);
+
+ if (tgt->lut_bottom->dd_rdonly)
+ RETURN(0);
- th = dt_trans_create(env, tg->lut_bottom);
+ th = dt_trans_create(env, tgt->lut_bottom);
if (IS_ERR(th))
RETURN(PTR_ERR(th));
th->th_sync = sync;
- rc = dt_declare_record_write(env, tg->lut_last_rcvd,
- sizeof(struct lr_server_data),
- tti->tti_off, th);
+ tti_buf_lsd(tti);
+ rc = dt_declare_record_write(env, tgt->lut_last_rcvd,
+ &tti->tti_buf, tti->tti_off, th);
if (rc)
GOTO(out, rc);
- rc = dt_trans_start(env, tg->lut_bottom, th);
+ rc = dt_trans_start(env, tgt->lut_bottom, th);
if (rc)
GOTO(out, rc);
- rc = lut_server_data_write(env, tg, th);
+ rc = tgt_server_data_write(env, tgt, th);
out:
- dt_trans_stop(env, tg->lut_bottom, th);
+ dt_trans_stop(env, tgt->lut_bottom, th);
CDEBUG(D_INFO, "%s: update last_rcvd server data for UUID = %s, "
- "last_transno = "LPU64": rc = %d\n", tg->lut_obd->obd_name,
- tg->lut_lsd.lsd_uuid, tg->lut_lsd.lsd_last_transno, rc);
+ "last_transno = %llu: rc = %d\n", tgt->lut_obd->obd_name,
+ tgt->lut_lsd.lsd_uuid, tgt->lut_lsd.lsd_last_transno, rc);
RETURN(rc);
}
-EXPORT_SYMBOL(lut_server_data_update);
+EXPORT_SYMBOL(tgt_server_data_update);
-int lut_truncate_last_rcvd(const struct lu_env *env, struct lu_target *tg,
- loff_t size)
+static int tgt_truncate_object(const struct lu_env *env, struct lu_target *tgt,
+ struct dt_object *dt, loff_t size)
{
- struct dt_object *dt = tg->lut_last_rcvd;
struct thandle *th;
struct lu_attr attr;
int rc;
ENTRY;
+ if (tgt->lut_bottom->dd_rdonly)
+ RETURN(0);
+
attr.la_size = size;
attr.la_valid = LA_SIZE;
- th = dt_trans_create(env, tg->lut_bottom);
+ th = dt_trans_create(env, tgt->lut_bottom);
if (IS_ERR(th))
RETURN(PTR_ERR(th));
rc = dt_declare_punch(env, dt, size, OBD_OBJECT_EOF, th);
rc = dt_declare_attr_set(env, dt, &attr, th);
if (rc)
GOTO(cleanup, rc);
- rc = dt_trans_start_local(env, tg->lut_bottom, th);
+ rc = dt_trans_start_local(env, tgt->lut_bottom, th);
if (rc)
GOTO(cleanup, rc);
- rc = dt_punch(env, dt, size, OBD_OBJECT_EOF, th, BYPASS_CAPA);
+ rc = dt_punch(env, dt, size, OBD_OBJECT_EOF, th);
if (rc == 0)
- rc = dt_attr_set(env, dt, &attr, th, BYPASS_CAPA);
+ rc = dt_attr_set(env, dt, &attr, th);
cleanup:
- dt_trans_stop(env, tg->lut_bottom, th);
+ dt_trans_stop(env, tgt->lut_bottom, th);
RETURN(rc);
}
-EXPORT_SYMBOL(lut_truncate_last_rcvd);
-void lut_client_epoch_update(const struct lu_env *env, struct obd_export *exp)
+static void tgt_client_epoch_update(const struct lu_env *env,
+ struct obd_export *exp)
{
- struct lsd_client_data *lcd = exp->exp_target_data.ted_lcd;
- struct lu_target *lut = class_exp2tgt(exp);
-
- LASSERT(lut->lut_bottom);
- /** VBR: set client last_epoch to current epoch */
- if (lcd->lcd_last_epoch >= lut->lut_lsd.lsd_start_epoch)
- return;
- lcd->lcd_last_epoch = lut->lut_lsd.lsd_start_epoch;
- lut_client_data_update(env, exp);
+ struct lsd_client_data *lcd = exp->exp_target_data.ted_lcd;
+ struct lu_target *tgt = class_exp2tgt(exp);
+
+ LASSERT(tgt && tgt->lut_bottom);
+ /** VBR: set client last_epoch to current epoch */
+ if (lcd->lcd_last_epoch >= tgt->lut_lsd.lsd_start_epoch)
+ return;
+ lcd->lcd_last_epoch = tgt->lut_lsd.lsd_start_epoch;
+ tgt_client_data_update(env, exp);
}
-/**
- * Update boot epoch when recovery ends
- */
-void lut_boot_epoch_update(struct lu_target *lut)
+static int tgt_reply_data_upgrade_check(const struct lu_env *env,
+ struct lu_target *tgt)
{
- struct lu_env env;
- struct ptlrpc_request *req;
- __u32 start_epoch;
- cfs_list_t client_list;
- int rc;
-
- if (lut->lut_obd->obd_stopping)
- return;
+ struct lsd_reply_header *lrh = &tgt->lut_reply_header;
+ int rc;
- rc = lu_env_init(&env, LCT_DT_THREAD);
- if (rc) {
- CERROR("Can't initialize environment rc=%d\n", rc);
- return;
- }
-
- cfs_spin_lock(&lut->lut_translock);
- start_epoch = lr_epoch(lut->lut_last_transno) + 1;
- lut->lut_last_transno = (__u64)start_epoch << LR_EPOCH_BITS;
- lut->lut_lsd.lsd_start_epoch = start_epoch;
- cfs_spin_unlock(&lut->lut_translock);
-
- CFS_INIT_LIST_HEAD(&client_list);
- /**
- * The recovery is not yet finished and final queue can still be updated
- * with resend requests. Move final list to separate one for processing
- */
- cfs_spin_lock(&lut->lut_obd->obd_recovery_task_lock);
- cfs_list_splice_init(&lut->lut_obd->obd_final_req_queue, &client_list);
- cfs_spin_unlock(&lut->lut_obd->obd_recovery_task_lock);
-
- /**
- * go through list of exports participated in recovery and
- * set new epoch for them
- */
- cfs_list_for_each_entry(req, &client_list, rq_list) {
- LASSERT(!req->rq_export->exp_delayed);
- if (!req->rq_export->exp_vbr_failed)
- lut_client_epoch_update(&env, req->rq_export);
- }
- /** return list back at once */
- cfs_spin_lock(&lut->lut_obd->obd_recovery_task_lock);
- cfs_list_splice_init(&client_list, &lut->lut_obd->obd_final_req_queue);
- cfs_spin_unlock(&lut->lut_obd->obd_recovery_task_lock);
- /** update server epoch */
- lut_server_data_update(&env, lut, 1);
- lu_env_fini(&env);
-}
-EXPORT_SYMBOL(lut_boot_epoch_update);
+ /*
+ * Reply data is supported by MDT targets only for now.
+ * When reply data object @lut_reply_data is NULL, it indicates the
+ * target type is OST and it should skip the upgrade check.
+ */
+ if (tgt->lut_reply_data == NULL)
+ RETURN(0);
-/**
- * commit callback, need to update last_commited value
- */
-struct lut_last_committed_callback {
- struct dt_txn_commit_cb llcc_cb;
- struct lu_target *llcc_lut;
- struct obd_export *llcc_exp;
- __u64 llcc_transno;
-};
+ rc = tgt_reply_header_read(env, tgt, lrh);
+ if (rc) {
+ CERROR("%s: failed to read %s: rc = %d\n",
+ tgt_name(tgt), REPLY_DATA, rc);
+ RETURN(rc);
+ }
-void lut_cb_last_committed(struct lu_env *env, struct thandle *th,
- struct dt_txn_commit_cb *cb, int err)
-{
- struct lut_last_committed_callback *ccb;
+ if (lrh->lrh_magic == LRH_MAGIC)
+ RETURN(0);
- ccb = container_of0(cb, struct lut_last_committed_callback, llcc_cb);
+ rc = tgt_truncate_object(env, tgt, tgt->lut_reply_data, 0);
+ if (rc) {
+ CERROR("%s: failed to truncate %s: rc = %d\n",
+ tgt_name(tgt), REPLY_DATA, rc);
+ RETURN(rc);
+ }
- LASSERT(ccb->llcc_lut != NULL);
- LASSERT(ccb->llcc_exp->exp_obd == ccb->llcc_lut->lut_obd);
+ lrh->lrh_magic = LRH_MAGIC;
+ lrh->lrh_header_size = sizeof(struct lsd_reply_header);
+ if (lrh->lrh_magic == LRH_MAGIC_V1)
+ lrh->lrh_reply_size = sizeof(struct lsd_reply_data_v1);
+ else
+ lrh->lrh_reply_size = sizeof(struct lsd_reply_data_v2);
- cfs_spin_lock(&ccb->llcc_lut->lut_translock);
- if (ccb->llcc_transno > ccb->llcc_lut->lut_obd->obd_last_committed)
- ccb->llcc_lut->lut_obd->obd_last_committed = ccb->llcc_transno;
+ rc = tgt_reply_header_write(env, tgt, lrh);
+ if (rc)
+ CERROR("%s: failed to write header for %s: rc = %d\n",
+ tgt_name(tgt), REPLY_DATA, rc);
- LASSERT(ccb->llcc_exp);
- if (ccb->llcc_transno > ccb->llcc_exp->exp_last_committed) {
- ccb->llcc_exp->exp_last_committed = ccb->llcc_transno;
- cfs_spin_unlock(&ccb->llcc_lut->lut_translock);
- ptlrpc_commit_replies(ccb->llcc_exp);
- } else {
- cfs_spin_unlock(&ccb->llcc_lut->lut_translock);
- }
- class_export_cb_put(ccb->llcc_exp);
- if (ccb->llcc_transno)
- CDEBUG(D_HA, "%s: transno "LPD64" is committed\n",
- ccb->llcc_lut->lut_obd->obd_name, ccb->llcc_transno);
- OBD_FREE_PTR(ccb);
+ RETURN(rc);
}
-int lut_last_commit_cb_add(struct thandle *th, struct lu_target *lut,
- struct obd_export *exp, __u64 transno)
+/**
+ * Update boot epoch when recovery ends
+ */
+void tgt_boot_epoch_update(struct lu_target *tgt)
{
- struct lut_last_committed_callback *ccb;
- struct dt_txn_commit_cb *dcb;
- int rc;
-
- OBD_ALLOC_PTR(ccb);
- if (ccb == NULL)
- return -ENOMEM;
-
- ccb->llcc_lut = lut;
- ccb->llcc_exp = class_export_cb_get(exp);
- ccb->llcc_transno = transno;
+ struct lu_env env;
+ struct ptlrpc_request *req;
+ __u32 start_epoch;
+ LIST_HEAD(client_list);
+ int rc;
- dcb = &ccb->llcc_cb;
- dcb->dcb_func = lut_cb_last_committed;
- CFS_INIT_LIST_HEAD(&dcb->dcb_linkage);
- strncpy(dcb->dcb_name, "lut_cb_last_committed", MAX_COMMIT_CB_STR_LEN);
- dcb->dcb_name[MAX_COMMIT_CB_STR_LEN - 1] = '\0';
+ if (tgt->lut_obd->obd_stopping)
+ return;
- rc = dt_trans_cb_add(th, dcb);
+ rc = lu_env_init(&env, LCT_DT_THREAD);
if (rc) {
- class_export_cb_put(exp);
- OBD_FREE_PTR(ccb);
+ CERROR("%s: can't initialize environment: rc = %d\n",
+ tgt->lut_obd->obd_name, rc);
+ return;
}
- if ((exp->exp_connect_flags & OBD_CONNECT_LIGHTWEIGHT) != 0)
- /* report failure to force synchronous operation */
- return -EPERM;
+ spin_lock(&tgt->lut_translock);
+ start_epoch = (tgt->lut_last_transno >> LR_EPOCH_BITS) + 1;
+ tgt->lut_last_transno = (__u64)start_epoch << LR_EPOCH_BITS;
+ tgt->lut_lsd.lsd_start_epoch = start_epoch;
+ spin_unlock(&tgt->lut_translock);
- return rc;
+ /**
+ * The recovery is not yet finished and final queue can still be updated
+ * with resend requests. Move final list to separate one for processing
+ */
+ spin_lock(&tgt->lut_obd->obd_recovery_task_lock);
+ list_splice_init(&tgt->lut_obd->obd_final_req_queue, &client_list);
+ spin_unlock(&tgt->lut_obd->obd_recovery_task_lock);
+
+ /**
+ * go through list of exports participated in recovery and
+ * set new epoch for them
+ */
+ list_for_each_entry(req, &client_list, rq_list) {
+ LASSERT(!req->rq_export->exp_delayed);
+ if (!req->rq_export->exp_vbr_failed)
+ tgt_client_epoch_update(&env, req->rq_export);
+ }
+ /** return list back at once */
+ spin_lock(&tgt->lut_obd->obd_recovery_task_lock);
+ list_splice_init(&client_list, &tgt->lut_obd->obd_final_req_queue);
+ spin_unlock(&tgt->lut_obd->obd_recovery_task_lock);
+
+ /**
+ * Clear MULTI RPCS incompatibility flag if there is no multi-rpcs
+ * client in last_rcvd file
+ */
+ if (atomic_read(&tgt->lut_num_clients) == 0)
+ tgt->lut_lsd.lsd_feature_incompat &= ~OBD_INCOMPAT_MULTI_RPCS;
+
+ /** update server epoch */
+ tgt_server_data_update(&env, tgt, 1);
+ tgt_reply_data_upgrade_check(&env, tgt);
+ lu_env_fini(&env);
}
-EXPORT_SYMBOL(lut_last_commit_cb_add);
-struct lut_new_client_callback {
- struct dt_txn_commit_cb lncc_cb;
- struct obd_export *lncc_exp;
+/**
+ * commit callback, need to update last_committed value
+ */
+struct tgt_last_committed_callback {
+ struct dt_txn_commit_cb llcc_cb;
+ struct lu_target *llcc_tgt;
+ struct obd_export *llcc_exp;
+ __u64 llcc_transno;
};
-void lut_cb_new_client(struct lu_env *env, struct thandle *th,
- struct dt_txn_commit_cb *cb, int err)
+static void tgt_cb_last_committed(struct lu_env *env, struct thandle *th,
+ struct dt_txn_commit_cb *cb, int err)
{
- struct lut_new_client_callback *ccb;
+ struct tgt_last_committed_callback *ccb;
- ccb = container_of0(cb, struct lut_new_client_callback, lncc_cb);
+ ccb = container_of(cb, struct tgt_last_committed_callback, llcc_cb);
- LASSERT(ccb->lncc_exp->exp_obd);
+ LASSERT(ccb->llcc_exp);
+ LASSERT(ccb->llcc_tgt != NULL);
+ LASSERT(ccb->llcc_exp->exp_obd == ccb->llcc_tgt->lut_obd);
- CDEBUG(D_RPCTRACE, "%s: committing for initial connect of %s\n",
- ccb->lncc_exp->exp_obd->obd_name,
- ccb->lncc_exp->exp_client_uuid.uuid);
+ if (th->th_reserved_quota.lqi_space > 0) {
+ CDEBUG(D_QUOTA, "free quota %llu %llu\n",
+ th->th_reserved_quota.lqi_id.qid_gid,
+ th->th_reserved_quota.lqi_space);
- cfs_spin_lock(&ccb->lncc_exp->exp_lock);
- ccb->lncc_exp->exp_need_sync = 0;
- cfs_spin_unlock(&ccb->lncc_exp->exp_lock);
- class_export_cb_put(ccb->lncc_exp);
+ /* env can be NULL for freeing reserved quota */
+ th->th_reserved_quota.lqi_space *= -1;
+ dt_reserve_or_free_quota(NULL, th->th_dev,
+ &th->th_reserved_quota);
+ }
+
+ /* error hit, don't update last committed to provide chance to
+ * replay data after fail */
+ if (err != 0)
+ goto out;
+
+ /* Fast path w/o spinlock, if exp_last_committed was updated
+ * with higher transno, no need to take spinlock and check,
+ * also no need to update obd_last_committed. */
+ if (ccb->llcc_transno <= ccb->llcc_exp->exp_last_committed)
+ goto out;
+ spin_lock(&ccb->llcc_tgt->lut_translock);
+ if (ccb->llcc_transno > ccb->llcc_tgt->lut_obd->obd_last_committed)
+ ccb->llcc_tgt->lut_obd->obd_last_committed = ccb->llcc_transno;
+
+ if (ccb->llcc_transno > ccb->llcc_exp->exp_last_committed) {
+ ccb->llcc_exp->exp_last_committed = ccb->llcc_transno;
+ spin_unlock(&ccb->llcc_tgt->lut_translock);
+
+ ptlrpc_commit_replies(ccb->llcc_exp);
+ tgt_cancel_slc_locks(ccb->llcc_tgt, ccb->llcc_transno);
+ } else {
+ spin_unlock(&ccb->llcc_tgt->lut_translock);
+ }
- OBD_FREE_PTR(ccb);
+ CDEBUG(D_HA, "%s: transno %lld is committed\n",
+ ccb->llcc_tgt->lut_obd->obd_name, ccb->llcc_transno);
+
+out:
+ class_export_cb_put(ccb->llcc_exp);
+ OBD_FREE_PTR(ccb);
}
-int lut_new_client_cb_add(struct thandle *th, struct obd_export *exp)
+/**
+ * Add commit callback function, it returns a non-zero value to inform
+ * caller to use sync transaction if necessary.
+ */
+static int tgt_last_commit_cb_add(struct thandle *th, struct lu_target *tgt,
+ struct obd_export *exp, __u64 transno)
{
- struct lut_new_client_callback *ccb;
- struct dt_txn_commit_cb *dcb;
- int rc;
+ struct tgt_last_committed_callback *ccb;
+ struct dt_txn_commit_cb *dcb;
+ int rc;
OBD_ALLOC_PTR(ccb);
if (ccb == NULL)
return -ENOMEM;
- ccb->lncc_exp = class_export_cb_get(exp);
+ ccb->llcc_tgt = tgt;
+ ccb->llcc_exp = class_export_cb_get(exp);
+ ccb->llcc_transno = transno;
- dcb = &ccb->lncc_cb;
- dcb->dcb_func = lut_cb_new_client;
- CFS_INIT_LIST_HEAD(&dcb->dcb_linkage);
- strncpy(dcb->dcb_name, "lut_cb_new_client", MAX_COMMIT_CB_STR_LEN);
- dcb->dcb_name[MAX_COMMIT_CB_STR_LEN - 1] = '\0';
+ dcb = &ccb->llcc_cb;
+ dcb->dcb_func = tgt_cb_last_committed;
+ INIT_LIST_HEAD(&dcb->dcb_linkage);
+ strlcpy(dcb->dcb_name, "tgt_cb_last_committed", sizeof(dcb->dcb_name));
rc = dt_trans_cb_add(th, dcb);
if (rc) {
class_export_cb_put(exp);
OBD_FREE_PTR(ccb);
}
- return rc;
+
+ if (exp_connect_flags(exp) & OBD_CONNECT_LIGHTWEIGHT)
+ /* report failure to force synchronous operation */
+ return -EPERM;
+
+ /* if exp_need_sync is set, return non-zero value to force
+ * a sync transaction. */
+ return rc ? rc : exp->exp_need_sync;
+}
+
+static int tgt_is_local_client(const struct lu_env *env,
+ struct obd_export *exp)
+{
+ struct lu_target *tgt = class_exp2tgt(exp);
+ struct tgt_session_info *tsi = tgt_ses_info(env);
+ struct ptlrpc_request *req = tgt_ses_req(tsi);
+
+ if (exp_connect_flags(exp) & OBD_CONNECT_MDS ||
+ exp_connect_flags(exp) & OBD_CONNECT_MDS_MDS)
+ return 0;
+ if (tgt->lut_local_recovery)
+ return 0;
+ if (!req)
+ return 0;
+ if (!LNetIsPeerLocal(&req->rq_peer.nid))
+ return 0;
+
+ return 1;
}
/**
* We use a bitmap to locate a free space in the last_rcvd file and initialize
* tg_export_data.
*/
-int lut_client_new(const struct lu_env *env, struct obd_export *exp)
+int tgt_client_new(const struct lu_env *env, struct obd_export *exp)
{
- struct tg_export_data *ted = &exp->exp_target_data;
- struct lu_target *tg = class_exp2tgt(exp);
- int rc = 0, idx;
+ struct tg_export_data *ted = &exp->exp_target_data;
+ struct lu_target *tgt = class_exp2tgt(exp);
+ int rc = 0, idx;
ENTRY;
- LASSERT(tg->lut_client_bitmap != NULL);
- if (!strcmp(ted->ted_lcd->lcd_uuid, tg->lut_obd->obd_uuid.uuid))
+ LASSERT(tgt && tgt->lut_client_bitmap != NULL);
+ if (!strcmp(ted->ted_lcd->lcd_uuid, tgt->lut_obd->obd_uuid.uuid))
RETURN(0);
- cfs_mutex_init(&ted->ted_lcd_lock);
+ if (exp_connect_flags(exp) & OBD_CONNECT_LIGHTWEIGHT)
+ RETURN(0);
- if ((exp->exp_connect_flags & OBD_CONNECT_LIGHTWEIGHT) != 0)
+ if (tgt_is_local_client(env, exp)) {
+ LCONSOLE_WARN("%s: local client %s w/o recovery\n",
+ exp->exp_obd->obd_name, ted->ted_lcd->lcd_uuid);
+ exp->exp_no_recovery = 1;
RETURN(0);
+ }
/* the bitmap operations can handle cl_idx > sizeof(long) * 8, so
* there's no need for extra complication here
*/
- idx = cfs_find_first_zero_bit(tg->lut_client_bitmap, LR_MAX_CLIENTS);
+ idx = find_first_zero_bit(tgt->lut_client_bitmap, LR_MAX_CLIENTS);
repeat:
if (idx >= LR_MAX_CLIENTS ||
- OBD_FAIL_CHECK(OBD_FAIL_MDS_CLIENT_ADD)) {
+ CFS_FAIL_CHECK(OBD_FAIL_MDS_CLIENT_ADD)) {
CERROR("%s: no room for %u clients - fix LR_MAX_CLIENTS\n",
- tg->lut_obd->obd_name, idx);
+ tgt->lut_obd->obd_name, idx);
RETURN(-EOVERFLOW);
}
- if (cfs_test_and_set_bit(idx, tg->lut_client_bitmap)) {
- idx = cfs_find_next_zero_bit(tg->lut_client_bitmap,
+ if (test_and_set_bit(idx, tgt->lut_client_bitmap)) {
+ idx = find_next_zero_bit(tgt->lut_client_bitmap,
LR_MAX_CLIENTS, idx);
goto repeat;
}
- CDEBUG(D_INFO, "%s: client at idx %d with UUID '%s' added\n",
- tg->lut_obd->obd_name, idx, ted->ted_lcd->lcd_uuid);
-
ted->ted_lr_idx = idx;
- ted->ted_lr_off = tg->lut_lsd.lsd_client_start +
- idx * tg->lut_lsd.lsd_client_size;
+ ted->ted_lr_off = tgt->lut_lsd.lsd_client_start +
+ idx * tgt->lut_lsd.lsd_client_size;
LASSERTF(ted->ted_lr_off > 0, "ted_lr_off = %llu\n", ted->ted_lr_off);
- CDEBUG(D_INFO, "%s: new client at index %d (%llu) with UUID '%s'\n",
- tg->lut_obd->obd_name, ted->ted_lr_idx, ted->ted_lr_off,
- ted->ted_lcd->lcd_uuid);
+ if (tgt_is_multimodrpcs_client(exp)) {
+ /* Set MULTI RPCS incompatibility flag to prevent previous
+ * Lustre versions to mount a target with reply_data file */
+ if (!(tgt->lut_lsd.lsd_feature_incompat &
+ OBD_INCOMPAT_MULTI_RPCS)) {
+ tgt->lut_lsd.lsd_feature_incompat |=
+ OBD_INCOMPAT_MULTI_RPCS;
+ rc = tgt_server_data_update(env, tgt, 1);
+ if (rc < 0) {
+ CERROR("%s: unable to set MULTI RPCS "
+ "incompatibility flag\n",
+ exp->exp_obd->obd_name);
+ RETURN(rc);
+ }
+ }
+
+ /* assign client slot generation */
+ ted->ted_lcd->lcd_generation =
+ atomic_inc_return(&tgt->lut_client_generation);
+ } else {
+ ted->ted_lcd->lcd_generation = 0;
+ }
+
+ CDEBUG(D_INFO, "%s: new client at index %d (%llu) with UUID '%s' "
+ "generation %d\n",
+ tgt->lut_obd->obd_name, ted->ted_lr_idx, ted->ted_lr_off,
+ ted->ted_lcd->lcd_uuid, ted->ted_lcd->lcd_generation);
- if (OBD_FAIL_CHECK(OBD_FAIL_TGT_CLIENT_ADD))
+ if (CFS_FAIL_CHECK(OBD_FAIL_TGT_CLIENT_ADD))
RETURN(-ENOSPC);
- rc = lut_client_data_update(env, exp);
- if (rc)
+ rc = tgt_client_data_update(env, exp);
+ if (rc) {
CERROR("%s: Failed to write client lcd at idx %d, rc %d\n",
- tg->lut_obd->obd_name, idx, rc);
+ tgt->lut_obd->obd_name, idx, rc);
+ RETURN(rc);
+ }
- RETURN(rc);
+ if (tgt_is_multimodrpcs_client(exp))
+ atomic_inc(&tgt->lut_num_clients);
+
+ RETURN(0);
}
-EXPORT_SYMBOL(lut_client_new);
+EXPORT_SYMBOL(tgt_client_new);
-/* Add client data to the MDS. We use a bitmap to locate a free space
- * in the last_rcvd file if cl_off is -1 (i.e. a new client).
- * Otherwise, we just have to read the data from the last_rcvd file and
- * we know its offset.
+/* Add an existing client to the MDS in-memory state based on
+ * a client that was previously found in the last_rcvd file and
+ * already has an assigned slot (idx >= 0).
*
* It should not be possible to fail adding an existing client - otherwise
* mdt_init_server_data() callsite needs to be fixed.
*/
-int lut_client_add(const struct lu_env *env, struct obd_export *exp, int idx)
+int tgt_client_add(const struct lu_env *env, struct obd_export *exp, int idx)
{
- struct tg_export_data *ted = &exp->exp_target_data;
- struct lu_target *tg = class_exp2tgt(exp);
+ struct tg_export_data *ted = &exp->exp_target_data;
+ struct lu_target *tgt = class_exp2tgt(exp);
ENTRY;
- LASSERT(tg->lut_client_bitmap != NULL);
+ LASSERT(tgt && tgt->lut_client_bitmap != NULL);
LASSERTF(idx >= 0, "%d\n", idx);
- if (!strcmp(ted->ted_lcd->lcd_uuid, tg->lut_obd->obd_uuid.uuid) ||
- (exp->exp_connect_flags & OBD_CONNECT_LIGHTWEIGHT) != 0)
+ if (!strcmp(ted->ted_lcd->lcd_uuid, tgt->lut_obd->obd_uuid.uuid) ||
+ exp_connect_flags(exp) & OBD_CONNECT_LIGHTWEIGHT)
RETURN(0);
- if (cfs_test_and_set_bit(idx, tg->lut_client_bitmap)) {
+ if (test_and_set_bit(idx, tgt->lut_client_bitmap)) {
CERROR("%s: client %d: bit already set in bitmap!!\n",
- tg->lut_obd->obd_name, idx);
+ tgt->lut_obd->obd_name, idx);
LBUG();
}
- CDEBUG(D_INFO, "%s: client at idx %d with UUID '%s' added\n",
- tg->lut_obd->obd_name, idx, ted->ted_lcd->lcd_uuid);
+ CDEBUG(D_INFO, "%s: client at idx %d with UUID '%s' added, "
+ "generation %d\n",
+ tgt->lut_obd->obd_name, idx, ted->ted_lcd->lcd_uuid,
+ ted->ted_lcd->lcd_generation);
ted->ted_lr_idx = idx;
- ted->ted_lr_off = tg->lut_lsd.lsd_client_start +
- idx * tg->lut_lsd.lsd_client_size;
+ ted->ted_lr_off = tgt->lut_lsd.lsd_client_start +
+ idx * tgt->lut_lsd.lsd_client_size;
- cfs_mutex_init(&ted->ted_lcd_lock);
+ mutex_init(&ted->ted_lcd_lock);
LASSERTF(ted->ted_lr_off > 0, "ted_lr_off = %llu\n", ted->ted_lr_off);
RETURN(0);
}
-EXPORT_SYMBOL(lut_client_add);
-int lut_client_del(const struct lu_env *env, struct obd_export *exp)
+int tgt_client_del(const struct lu_env *env, struct obd_export *exp)
{
- struct tg_export_data *ted = &exp->exp_target_data;
- struct lu_target *tg = class_exp2tgt(exp);
- int rc;
+ struct tg_export_data *ted = &exp->exp_target_data;
+ struct lu_target *tgt = class_exp2tgt(exp);
+ int rc;
ENTRY;
LASSERT(ted->ted_lcd);
+ if (unlikely(tgt == NULL)) {
+ CDEBUG(D_ERROR, "%s: No target for connected export\n",
+ class_exp2obd(exp)->obd_name);
+ RETURN(-EINVAL);
+ }
+
/* XXX if lcd_uuid were a real obd_uuid, I could use obd_uuid_equals */
if (!strcmp((char *)ted->ted_lcd->lcd_uuid,
- (char *)tg->lut_obd->obd_uuid.uuid) ||
- (exp->exp_connect_flags & OBD_CONNECT_LIGHTWEIGHT) != 0)
+ (char *)tgt->lut_obd->obd_uuid.uuid) ||
+ exp_connect_flags(exp) & OBD_CONNECT_LIGHTWEIGHT ||
+ exp->exp_no_recovery)
RETURN(0);
+ /* Slot may be not yet assigned, use case is race between Client
+ * reconnect and forced eviction */
+ if (ted->ted_lr_idx < 0) {
+ CWARN("%s: client with UUID '%s' not in bitmap\n",
+ tgt->lut_obd->obd_name, ted->ted_lcd->lcd_uuid);
+ RETURN(0);
+ }
+
CDEBUG(D_INFO, "%s: del client at idx %u, off %lld, UUID '%s'\n",
- tg->lut_obd->obd_name, ted->ted_lr_idx, ted->ted_lr_off,
+ tgt->lut_obd->obd_name, ted->ted_lr_idx, ted->ted_lr_off,
ted->ted_lcd->lcd_uuid);
/* Clear the bit _after_ zeroing out the client so we don't
race with filter_client_add and zero out new clients.*/
- if (!cfs_test_bit(ted->ted_lr_idx, tg->lut_client_bitmap)) {
+ if (!test_bit(ted->ted_lr_idx, tgt->lut_client_bitmap)) {
CERROR("%s: client %u: bit already clear in bitmap!!\n",
- tg->lut_obd->obd_name, ted->ted_lr_idx);
+ tgt->lut_obd->obd_name, ted->ted_lr_idx);
LBUG();
}
if (exp->exp_flags & OBD_OPT_FAILOVER)
RETURN(0);
+ if (CFS_FAIL_CHECK(OBD_FAIL_TGT_CLIENT_DEL))
+ RETURN(0);
+
/* Make sure the server's last_transno is up to date.
* This should be done before zeroing client slot so last_transno will
* be in server data or in client data in case of failure */
- rc = lut_server_data_update(env, tg, 0);
+ rc = tgt_server_data_update(env, tgt, 0);
if (rc != 0) {
CERROR("%s: failed to update server data, skip client %s "
- "zeroing, rc %d\n", tg->lut_obd->obd_name,
+ "zeroing, rc %d\n", tgt->lut_obd->obd_name,
ted->ted_lcd->lcd_uuid, rc);
RETURN(rc);
}
- cfs_mutex_lock(&ted->ted_lcd_lock);
+ /* Race between an eviction and a disconnection ?*/
+ mutex_lock(&ted->ted_lcd_lock);
+ if (ted->ted_lcd->lcd_uuid[0] == '\0') {
+ mutex_unlock(&ted->ted_lcd_lock);
+ RETURN(rc);
+ }
+
memset(ted->ted_lcd->lcd_uuid, 0, sizeof ted->ted_lcd->lcd_uuid);
- rc = lut_client_data_update(env, exp);
- cfs_mutex_unlock(&ted->ted_lcd_lock);
+ mutex_unlock(&ted->ted_lcd_lock);
+
+ rc = tgt_client_data_update(env, exp);
+
+ if (!rc && tgt_is_multimodrpcs_record(tgt, ted->ted_lcd))
+ atomic_dec(&tgt->lut_num_clients);
CDEBUG(rc == 0 ? D_INFO : D_ERROR,
"%s: zeroing out client %s at idx %u (%llu), rc %d\n",
- tg->lut_obd->obd_name, ted->ted_lcd->lcd_uuid,
+ tgt->lut_obd->obd_name, ted->ted_lcd->lcd_uuid,
ted->ted_lr_idx, ted->ted_lr_off, rc);
RETURN(rc);
}
-EXPORT_SYMBOL(lut_client_del);
+EXPORT_SYMBOL(tgt_client_del);
+
+static void tgt_clean_by_tag(struct obd_export *exp, __u64 xid, __u16 tag)
+{
+ struct tg_export_data *ted = &exp->exp_target_data;
+ struct lu_target *lut = class_exp2tgt(exp);
+ struct tg_reply_data *trd, *tmp;
+
+ if (tag == 0)
+ return;
+
+ list_for_each_entry_safe(trd, tmp, &ted->ted_reply_list, trd_list) {
+ if (trd->trd_tag != tag)
+ continue;
+
+ LASSERT(ergo(tgt_is_increasing_xid_client(exp),
+ trd->trd_reply.lrd_xid <= xid));
+
+ ted->ted_release_tag++;
+ tgt_release_reply_data(lut, ted, trd);
+ }
+}
+
+static int tgt_add_reply_data(const struct lu_env *env, struct lu_target *tgt,
+ struct tg_export_data *ted, struct tg_reply_data *trd,
+ struct ptlrpc_request *req,
+ struct thandle *th, bool update_lrd_file)
+{
+ struct tgt_session_info *tsi = NULL;
+ struct lsd_reply_data *lrd;
+ int i = -1;
+ int rc;
+
+ lrd = &trd->trd_reply;
+ /* update export last transno */
+ mutex_lock(&ted->ted_lcd_lock);
+ if (lrd->lrd_transno > ted->ted_lcd->lcd_last_transno)
+ ted->ted_lcd->lcd_last_transno = lrd->lrd_transno;
+ mutex_unlock(&ted->ted_lcd_lock);
+
+ if (!tgt) {
+ trd->trd_index = TRD_INDEX_MEMORY;
+ GOTO(add_reply_data, rc = 0);
+ }
+
+ if (env) {
+ tsi = tgt_ses_info(env);
+ if (tsi->tsi_batch_trd) {
+ LASSERT(tsi->tsi_batch_env);
+ trd = tsi->tsi_batch_trd;
+ i = trd->trd_index;
+ }
+ }
+
+ if (i == -1) {
+ /* find a empty slot */
+ i = tgt_find_free_reply_slot(tgt);
+ if (unlikely(i < 0)) {
+ CERROR("%s: couldn't find a slot for reply data: rc = %d\n",
+ tgt_name(tgt), i);
+ RETURN(i);
+ }
+ trd->trd_index = i;
+ }
+
+ if (update_lrd_file) {
+ struct lsd_reply_header *lrh = &tgt->lut_reply_header;
+ loff_t off;
+
+ /* write reply data to disk */
+ off = lrh->lrh_header_size + lrh->lrh_reply_size * i;
+ rc = tgt_reply_data_write(env, tgt, lrd, off, th);
+ if (unlikely(rc != 0)) {
+ CERROR("%s: can't update %s file: rc = %d\n",
+ tgt_name(tgt), REPLY_DATA, rc);
+ GOTO(free_slot, rc);
+ }
+ }
+
+add_reply_data:
+ /* add reply data to target export's reply list */
+ mutex_lock(&ted->ted_lcd_lock);
+ if (req != NULL) {
+ int exclude = tgt_is_increasing_xid_client(req->rq_export) ?
+ MSG_REPLAY : MSG_REPLAY|MSG_RESENT;
+
+ if (req->rq_obsolete) {
+ CDEBUG(D_INFO,
+ "drop reply data update for obsolete req xid=%llu,"
+ "transno=%llu, tag=%hu\n", req->rq_xid,
+ lrd->lrd_transno, trd->trd_tag);
+ mutex_unlock(&ted->ted_lcd_lock);
+ GOTO(free_slot, rc = -EBADR);
+ }
+
+ if (!(lustre_msg_get_flags(req->rq_reqmsg) & exclude) &&
+ !(tsi && tsi->tsi_batch_env &&
+ trd->trd_reply.lrd_batch_idx > 0))
+ tgt_clean_by_tag(req->rq_export, req->rq_xid,
+ trd->trd_tag);
+ }
+
+ /*
+ * For the batched RPC, all sub requests use one common @trd for the
+ * reply data.
+ */
+ if (list_empty(&trd->trd_list)) {
+ list_add(&trd->trd_list, &ted->ted_reply_list);
+ ted->ted_reply_cnt++;
+ if (ted->ted_reply_cnt > ted->ted_reply_max)
+ ted->ted_reply_max = ted->ted_reply_cnt;
+ }
+ mutex_unlock(&ted->ted_lcd_lock);
+
+ CDEBUG(D_TRACE, "add reply %p: xid %llu, transno %llu, "
+ "tag %hu, client gen %u, slot idx %d\n",
+ trd, lrd->lrd_xid, lrd->lrd_transno,
+ trd->trd_tag, lrd->lrd_client_gen, trd->trd_index);
+
+ RETURN(0);
+
+free_slot:
+ if (tgt != NULL)
+ tgt_clear_reply_slot(tgt, trd->trd_index);
+ return rc;
+}
+
+int tgt_mk_reply_data(const struct lu_env *env,
+ struct lu_target *tgt,
+ struct tg_export_data *ted,
+ struct ptlrpc_request *req,
+ __u64 opdata,
+ struct thandle *th,
+ bool write_update,
+ __u64 transno)
+{
+ struct tg_reply_data *trd = NULL;
+ struct lsd_reply_data *lrd;
+ __u64 *pre_versions = NULL;
+ struct tgt_session_info *tsi = NULL;
+ int rc;
+
+ if (env != NULL) {
+ tsi = tgt_ses_info(env);
+ if (tsi->tsi_batch_trd) {
+ LASSERT(tsi->tsi_batch_env);
+ trd = tsi->tsi_batch_trd;
+ }
+ }
+
+ if (trd == NULL) {
+ OBD_ALLOC_PTR(trd);
+ if (unlikely(trd == NULL))
+ RETURN(-ENOMEM);
+
+ INIT_LIST_HEAD(&trd->trd_list);
+ }
+
+ /* fill reply data information */
+ lrd = &trd->trd_reply;
+ lrd->lrd_transno = transno;
+ if (tsi && tsi->tsi_batch_env) {
+ if (tsi->tsi_batch_idx == 0) {
+ LASSERT(req != NULL);
+ tsi->tsi_batch_trd = trd;
+ trd->trd_index = -1;
+ lrd->lrd_xid = req->rq_xid;
+ trd->trd_tag = lustre_msg_get_tag(req->rq_reqmsg);
+ lrd->lrd_client_gen = ted->ted_lcd->lcd_generation;
+ }
+ lrd->lrd_batch_idx = tsi->tsi_batch_idx;
+ } else if (req != NULL) {
+ lrd->lrd_xid = req->rq_xid;
+ trd->trd_tag = lustre_msg_get_tag(req->rq_reqmsg);
+ lrd->lrd_client_gen = ted->ted_lcd->lcd_generation;
+ if (write_update) {
+ pre_versions = lustre_msg_get_versions(req->rq_repmsg);
+ lrd->lrd_result = th->th_result;
+ }
+ } else {
+ LASSERT(env != NULL);
+ LASSERT(tsi->tsi_xid != 0);
+
+ lrd->lrd_xid = tsi->tsi_xid;
+ lrd->lrd_result = tsi->tsi_result;
+ lrd->lrd_client_gen = tsi->tsi_client_gen;
+ }
+
+ lrd->lrd_data = opdata;
+ if (pre_versions) {
+ trd->trd_pre_versions[0] = pre_versions[0];
+ trd->trd_pre_versions[1] = pre_versions[1];
+ trd->trd_pre_versions[2] = pre_versions[2];
+ trd->trd_pre_versions[3] = pre_versions[3];
+ }
+
+ if (tsi && tsi->tsi_open_obj)
+ trd->trd_object = *lu_object_fid(&tsi->tsi_open_obj->do_lu);
+
+ rc = tgt_add_reply_data(env, tgt, ted, trd, req,
+ th, write_update);
+ if (rc < 0) {
+ OBD_FREE_PTR(trd);
+ if (rc == -EBADR)
+ rc = 0;
+ }
+ return rc;
+
+}
+EXPORT_SYMBOL(tgt_mk_reply_data);
+
+/*
+ * last_rcvd & last_committed update callbacks
+ */
+static int tgt_last_rcvd_update(const struct lu_env *env, struct lu_target *tgt,
+ struct dt_object *obj, __u64 opdata,
+ struct thandle *th, struct ptlrpc_request *req)
+{
+ struct tgt_thread_info *tti = tgt_th_info(env);
+ struct tgt_session_info *tsi = tgt_ses_info(env);
+ struct obd_export *exp = tsi->tsi_exp;
+ struct tg_export_data *ted;
+ __u64 *transno_p;
+ bool nolcd = false;
+ int rc = 0;
+
+ ENTRY;
+
+
+ LASSERT(exp != NULL);
+ ted = &exp->exp_target_data;
+
+ /* Some clients don't support recovery, and they don't have last_rcvd
+ * client data:
+ * 1. lightweight clients.
+ * 2. local clients on MDS which doesn't enable "localrecov".
+ * 3. OFD connect may cause transaction before export has last_rcvd
+ * slot.
+ */
+ if (ted->ted_lr_idx < 0)
+ nolcd = true;
+
+ if (req != NULL)
+ tti->tti_transno = lustre_msg_get_transno(req->rq_reqmsg);
+ else
+ /* From update replay, tti_transno should be set already */
+ LASSERT(tti->tti_transno != 0);
+
+ spin_lock(&tgt->lut_translock);
+ if (th->th_result != 0) {
+ if (tti->tti_transno != 0) {
+ CERROR("%s: replay transno %llu failed: rc = %d\n",
+ tgt_name(tgt), tti->tti_transno, th->th_result);
+ }
+ } else if (tti->tti_transno == 0) {
+ tti->tti_transno = ++tgt->lut_last_transno;
+ } else {
+ /* should be replay */
+ if (tti->tti_transno > tgt->lut_last_transno)
+ tgt->lut_last_transno = tti->tti_transno;
+ }
+ spin_unlock(&tgt->lut_translock);
+
+ /** VBR: set new versions */
+ if (th->th_result == 0 && obj != NULL) {
+ struct dt_object *dto = dt_object_locate(obj, th->th_dev);
+
+ dt_version_set(env, dto, tti->tti_transno, th);
+ if (unlikely(tsi->tsi_dv_update))
+ dt_data_version_set(env, dto, tti->tti_transno, th);
+ }
+
+ /* filling reply data */
+ CDEBUG(D_INODE, "transno = %llu, last_committed = %llu\n",
+ tti->tti_transno, tgt->lut_obd->obd_last_committed);
+
+ if (req != NULL) {
+ req->rq_transno = tti->tti_transno;
+ lustre_msg_set_transno(req->rq_repmsg, tti->tti_transno);
+ }
+
+ /* if can't add callback, do sync write */
+ th->th_sync |= !!tgt_last_commit_cb_add(th, tgt, exp, tti->tti_transno);
+
+ if (nolcd) {
+ /* store transno in the last_rcvd header */
+ spin_lock(&tgt->lut_translock);
+ if (tti->tti_transno > tgt->lut_lsd.lsd_last_transno) {
+ tgt->lut_lsd.lsd_last_transno = tti->tti_transno;
+ spin_unlock(&tgt->lut_translock);
+ /* Although current connection doesn't have slot
+ * in the last_rcvd, we still want to maintain
+ * the in-memory lsd_client_data structure in order to
+ * properly handle reply reconstruction. */
+ rc = tgt_server_data_write(env, tgt, th);
+ } else {
+ spin_unlock(&tgt->lut_translock);
+ }
+ } else if (ted->ted_lr_off == 0) {
+ CERROR("%s: client idx %d has offset %lld\n",
+ tgt_name(tgt), ted->ted_lr_idx, ted->ted_lr_off);
+ RETURN(-EINVAL);
+ }
+
+ /* Target that supports multiple reply data */
+ if (tgt_is_multimodrpcs_client(exp)) {
+ return tgt_mk_reply_data(env, tgt, ted, req, opdata, th,
+ !!(req != NULL), tti->tti_transno);
+ }
+
+ /* Enough for update replay, let's return */
+ if (req == NULL)
+ RETURN(rc);
+
+ mutex_lock(&ted->ted_lcd_lock);
+ LASSERT(ergo(tti->tti_transno == 0, th->th_result != 0));
+ if (lustre_msg_get_opc(req->rq_reqmsg) == MDS_CLOSE) {
+ transno_p = &ted->ted_lcd->lcd_last_close_transno;
+ ted->ted_lcd->lcd_last_close_xid = req->rq_xid;
+ ted->ted_lcd->lcd_last_close_result = th->th_result;
+ } else {
+ /* VBR: save versions in last_rcvd for reconstruct. */
+ __u64 *pre_versions = lustre_msg_get_versions(req->rq_repmsg);
+
+ if (pre_versions) {
+ ted->ted_lcd->lcd_pre_versions[0] = pre_versions[0];
+ ted->ted_lcd->lcd_pre_versions[1] = pre_versions[1];
+ ted->ted_lcd->lcd_pre_versions[2] = pre_versions[2];
+ ted->ted_lcd->lcd_pre_versions[3] = pre_versions[3];
+ }
+ transno_p = &ted->ted_lcd->lcd_last_transno;
+ ted->ted_lcd->lcd_last_xid = req->rq_xid;
+ ted->ted_lcd->lcd_last_result = th->th_result;
+ /* XXX: lcd_last_data is __u32 but intent_dispostion is __u64,
+ * see struct ldlm_reply->lock_policy_res1; */
+ ted->ted_lcd->lcd_last_data = opdata;
+ }
+
+ /* Update transno in slot only if non-zero number, i.e. no errors */
+ if (likely(tti->tti_transno != 0)) {
+ /* Don't overwrite bigger transaction number with lower one.
+ * That is not sign of problem in all cases, but in any case
+ * this value should be monotonically increased only. */
+ if (*transno_p > tti->tti_transno) {
+ if (!tgt->lut_no_reconstruct) {
+ CERROR("%s: trying to overwrite bigger transno:"
+ "on-disk: %llu, new: %llu replay: "
+ "%d. See LU-617.\n", tgt_name(tgt),
+ *transno_p, tti->tti_transno,
+ req_is_replay(req));
+ if (req_is_replay(req)) {
+ spin_lock(&req->rq_export->exp_lock);
+ req->rq_export->exp_vbr_failed = 1;
+ spin_unlock(&req->rq_export->exp_lock);
+ }
+ mutex_unlock(&ted->ted_lcd_lock);
+ RETURN(req_is_replay(req) ? -EOVERFLOW : 0);
+ }
+ } else {
+ *transno_p = tti->tti_transno;
+ }
+ }
+
+ if (!nolcd) {
+ tti->tti_off = ted->ted_lr_off;
+ if (CFS_FAIL_CHECK(OBD_FAIL_TGT_RCVD_EIO))
+ rc = -EIO;
+ else
+ rc = tgt_client_data_write(env, tgt, ted->ted_lcd,
+ &tti->tti_off, th);
+ if (rc < 0) {
+ mutex_unlock(&ted->ted_lcd_lock);
+ RETURN(rc);
+ }
+ }
+ mutex_unlock(&ted->ted_lcd_lock);
+ RETURN(rc);
+}
+
+/*
+ * last_rcvd update for echo client simulation.
+ * It updates last_rcvd client slot and version of object in
+ * simple way but with all locks to simulate all drawbacks
+ */
+static int tgt_last_rcvd_update_echo(const struct lu_env *env,
+ struct lu_target *tgt,
+ struct dt_object *obj,
+ struct thandle *th,
+ struct obd_export *exp)
+{
+ struct tgt_thread_info *tti = tgt_th_info(env);
+ struct tg_export_data *ted = &exp->exp_target_data;
+ int rc = 0;
+
+ ENTRY;
+
+ tti->tti_transno = 0;
+
+ spin_lock(&tgt->lut_translock);
+ if (th->th_result == 0)
+ tti->tti_transno = ++tgt->lut_last_transno;
+ spin_unlock(&tgt->lut_translock);
+
+ /** VBR: set new versions */
+ if (th->th_result == 0 && obj != NULL)
+ dt_version_set(env, obj, tti->tti_transno, th);
+
+ /* if can't add callback, do sync write */
+ th->th_sync |= !!tgt_last_commit_cb_add(th, tgt, exp,
+ tti->tti_transno);
+
+ LASSERT(ted->ted_lr_off > 0);
+
+ mutex_lock(&ted->ted_lcd_lock);
+ LASSERT(ergo(tti->tti_transno == 0, th->th_result != 0));
+ ted->ted_lcd->lcd_last_transno = tti->tti_transno;
+ ted->ted_lcd->lcd_last_result = th->th_result;
+
+ tti->tti_off = ted->ted_lr_off;
+ rc = tgt_client_data_write(env, tgt, ted->ted_lcd, &tti->tti_off, th);
+ mutex_unlock(&ted->ted_lcd_lock);
+ RETURN(rc);
+}
+
+static int tgt_clients_data_init(const struct lu_env *env,
+ struct lu_target *tgt,
+ unsigned long last_size)
+{
+ struct obd_device *obd = tgt->lut_obd;
+ struct lr_server_data *lsd = &tgt->lut_lsd;
+ struct lsd_client_data *lcd = NULL;
+ struct tg_export_data *ted;
+ int cl_idx;
+ int rc = 0;
+ loff_t off = lsd->lsd_client_start;
+ __u32 generation = 0;
+ struct cfs_hash *hash = NULL;
+
+ ENTRY;
+
+ if (tgt->lut_bottom->dd_rdonly)
+ RETURN(0);
+
+ BUILD_BUG_ON(offsetof(struct lsd_client_data, lcd_padding) +
+ sizeof(lcd->lcd_padding) != LR_CLIENT_SIZE);
+
+ OBD_ALLOC_PTR(lcd);
+ if (lcd == NULL)
+ RETURN(-ENOMEM);
+
+ hash = cfs_hash_getref(tgt->lut_obd->obd_gen_hash);
+ if (hash == NULL)
+ GOTO(err_out, rc = -ENODEV);
+
+ for (cl_idx = 0; off < last_size; cl_idx++) {
+ struct obd_export *exp;
+ __u64 last_transno;
+
+ /* Don't assume off is incremented properly by
+ * read_record(), in case sizeof(*lcd)
+ * isn't the same as fsd->lsd_client_size. */
+ off = lsd->lsd_client_start + cl_idx * lsd->lsd_client_size;
+ rc = tgt_client_data_read(env, tgt, lcd, &off, cl_idx);
+ if (rc) {
+ CERROR("%s: error reading last_rcvd %s idx %d off "
+ "%llu: rc = %d\n", tgt_name(tgt), LAST_RCVD,
+ cl_idx, off, rc);
+ rc = 0;
+ break; /* read error shouldn't cause startup to fail */
+ }
+
+ if (lcd->lcd_uuid[0] == '\0') {
+ CDEBUG(D_INFO, "skipping zeroed client at offset %d\n",
+ cl_idx);
+ continue;
+ }
+
+ last_transno = lcd_last_transno(lcd);
+
+ /* These exports are cleaned up by disconnect, so they
+ * need to be set up like real exports as connect does.
+ */
+ CDEBUG(D_HA, "RCVRNG CLIENT uuid: %s idx: %d lr: %llu"
+ " srv lr: %llu lx: %llu gen %u\n", lcd->lcd_uuid,
+ cl_idx, last_transno, lsd->lsd_last_transno,
+ lcd_last_xid(lcd), lcd->lcd_generation);
+
+ exp = class_new_export(obd, (struct obd_uuid *)lcd->lcd_uuid);
+ if (IS_ERR(exp)) {
+ if (PTR_ERR(exp) == -EALREADY) {
+ /* export already exists, zero out this one */
+ CERROR("%s: Duplicate export %s!\n",
+ tgt_name(tgt), lcd->lcd_uuid);
+ continue;
+ }
+ GOTO(err_out, rc = PTR_ERR(exp));
+ }
+
+ ted = &exp->exp_target_data;
+ *ted->ted_lcd = *lcd;
+
+ rc = tgt_client_add(env, exp, cl_idx);
+ LASSERTF(rc == 0, "rc = %d\n", rc); /* can't fail existing */
+ /* VBR: set export last committed version */
+ exp->exp_last_committed = last_transno;
+ spin_lock(&exp->exp_lock);
+ exp->exp_connecting = 0;
+ exp->exp_in_recovery = 0;
+ spin_unlock(&exp->exp_lock);
+ atomic_inc(&obd->obd_max_recoverable_clients);
+
+ if (tgt_is_multimodrpcs_record(tgt, lcd)) {
+ atomic_inc(&tgt->lut_num_clients);
+
+ /* compute the highest valid client generation */
+ generation = max(generation, lcd->lcd_generation);
+ /* fill client_generation <-> export hash table */
+ rc = cfs_hash_add_unique(hash, &lcd->lcd_generation,
+ &exp->exp_gen_hash);
+ if (rc != 0) {
+ CERROR("%s: duplicate export for client "
+ "generation %u\n",
+ tgt_name(tgt), lcd->lcd_generation);
+ class_export_put(exp);
+ GOTO(err_out, rc);
+ }
+ }
+
+ class_export_put(exp);
+
+ rc = rev_import_init(exp);
+ if (rc != 0) {
+ class_unlink_export(exp);
+ GOTO(err_out, rc);
+ }
+
+ /* Need to check last_rcvd even for duplicated exports. */
+ CDEBUG(D_OTHER, "client at idx %d has last_transno = %llu\n",
+ cl_idx, last_transno);
+
+ spin_lock(&tgt->lut_translock);
+ tgt->lut_last_transno = max(last_transno,
+ tgt->lut_last_transno);
+ spin_unlock(&tgt->lut_translock);
+ }
+
+ /* record highest valid client generation */
+ atomic_set(&tgt->lut_client_generation, generation);
+
+err_out:
+ if (hash != NULL)
+ cfs_hash_putref(hash);
+ OBD_FREE_PTR(lcd);
+ RETURN(rc);
+}
+
+struct server_compat_data {
+ __u32 rocompat;
+ __u32 incompat;
+ __u32 rocinit;
+ __u32 incinit;
+};
+
+static struct server_compat_data tgt_scd[] = {
+ [LDD_F_SV_TYPE_MDT] = {
+ .rocompat = OBD_ROCOMPAT_LOVOBJID,
+ .incompat = OBD_INCOMPAT_MDT | OBD_INCOMPAT_COMMON_LR |
+ OBD_INCOMPAT_FID | OBD_INCOMPAT_IAM_DIR |
+ OBD_INCOMPAT_LMM_VER | OBD_INCOMPAT_MULTI_OI |
+ OBD_INCOMPAT_MULTI_RPCS,
+ .rocinit = OBD_ROCOMPAT_LOVOBJID,
+ .incinit = OBD_INCOMPAT_MDT | OBD_INCOMPAT_COMMON_LR |
+ OBD_INCOMPAT_MULTI_OI,
+ },
+ [LDD_F_SV_TYPE_OST] = {
+ .rocompat = OBD_ROCOMPAT_IDX_IN_IDIF,
+ .incompat = OBD_INCOMPAT_OST | OBD_INCOMPAT_COMMON_LR |
+ OBD_INCOMPAT_FID,
+ .rocinit = OBD_ROCOMPAT_IDX_IN_IDIF,
+ .incinit = OBD_INCOMPAT_OST | OBD_INCOMPAT_COMMON_LR,
+ }
+};
+
+int tgt_server_data_init(const struct lu_env *env, struct lu_target *tgt)
+{
+ struct tgt_thread_info *tti = tgt_th_info(env);
+ struct lr_server_data *lsd = &tgt->lut_lsd;
+ unsigned long last_rcvd_size;
+ __u32 index;
+ int rc, type;
+
+ rc = dt_attr_get(env, tgt->lut_last_rcvd, &tti->tti_attr);
+ if (rc)
+ RETURN(rc);
+
+ last_rcvd_size = (unsigned long)tti->tti_attr.la_size;
+
+ /* ensure padding in the struct is the correct size */
+ BUILD_BUG_ON(offsetof(struct lr_server_data, lsd_padding) +
+ sizeof(lsd->lsd_padding) != LR_SERVER_SIZE);
+
+ rc = server_name2index(tgt_name(tgt), &index, NULL);
+ if (rc < 0) {
+ CERROR("%s: Can not get index from name: rc = %d\n",
+ tgt_name(tgt), rc);
+ RETURN(rc);
+ }
+ /* server_name2index() returns type */
+ type = rc;
+ if (type != LDD_F_SV_TYPE_MDT && type != LDD_F_SV_TYPE_OST) {
+ CERROR("%s: unknown target type %x\n", tgt_name(tgt), type);
+ RETURN(-EINVAL);
+ }
+
+ /* last_rcvd on OST doesn't provide reconstruct support because there
+ * may be up to 8 in-flight write requests per single slot in
+ * last_rcvd client data
+ */
+ tgt->lut_no_reconstruct = (type == LDD_F_SV_TYPE_OST);
+
+ if (last_rcvd_size == 0) {
+ LCONSOLE_WARN("%s: new disk, initializing\n", tgt_name(tgt));
+
+ memcpy(lsd->lsd_uuid, tgt->lut_obd->obd_uuid.uuid,
+ sizeof(lsd->lsd_uuid));
+ lsd->lsd_last_transno = 0;
+ lsd->lsd_mount_count = 0;
+ lsd->lsd_server_size = LR_SERVER_SIZE;
+ lsd->lsd_client_start = LR_CLIENT_START;
+ lsd->lsd_client_size = LR_CLIENT_SIZE;
+ lsd->lsd_subdir_count = OBJ_SUBDIR_COUNT;
+ lsd->lsd_osd_index = index;
+ lsd->lsd_feature_rocompat = tgt_scd[type].rocinit;
+ lsd->lsd_feature_incompat = tgt_scd[type].incinit;
+ } else {
+ rc = tgt_server_data_read(env, tgt);
+ if (rc) {
+ CERROR("%s: error reading LAST_RCVD: rc= %d\n",
+ tgt_name(tgt), rc);
+ RETURN(rc);
+ }
+ if (strcmp(lsd->lsd_uuid, tgt->lut_obd->obd_uuid.uuid)) {
+ if (tgt->lut_bottom->dd_rdonly) {
+ /* Such difference may be caused by mounting
+ * up snapshot with new fsname under rd_only
+ * mode. But even if it was NOT, it will not
+ * damage the system because of "rd_only". */
+ memcpy(lsd->lsd_uuid,
+ tgt->lut_obd->obd_uuid.uuid,
+ sizeof(lsd->lsd_uuid));
+ } else {
+ LCONSOLE_ERROR_MSG(0x157, "Trying to start "
+ "OBD %s using the wrong "
+ "disk %s. Were the /dev/ "
+ "assignments rearranged?\n",
+ tgt->lut_obd->obd_uuid.uuid,
+ lsd->lsd_uuid);
+ RETURN(-EINVAL);
+ }
+ }
+
+ if (lsd->lsd_osd_index != index) {
+ LCONSOLE_ERROR_MSG(0x157,
+ "%s: index %d in last rcvd is different with the index %d in config log, It might be disk corruption!\n",
+ tgt_name(tgt),
+ lsd->lsd_osd_index, index);
+ RETURN(-EINVAL);
+ }
+ }
+
+ if (lsd->lsd_feature_incompat & ~tgt_scd[type].incompat) {
+ CERROR("%s: unsupported incompat filesystem feature(s) %x\n",
+ tgt_name(tgt),
+ lsd->lsd_feature_incompat & ~tgt_scd[type].incompat);
+ RETURN(-EINVAL);
+ }
+
+ if (type == LDD_F_SV_TYPE_MDT)
+ lsd->lsd_feature_incompat |= OBD_INCOMPAT_FID;
+
+ if (lsd->lsd_feature_rocompat & ~tgt_scd[type].rocompat) {
+ CERROR("%s: unsupported read-only filesystem feature(s) %x\n",
+ tgt_name(tgt),
+ lsd->lsd_feature_rocompat & ~tgt_scd[type].rocompat);
+ RETURN(-EINVAL);
+ }
+ /** Interop: evict all clients at first boot with 1.8 last_rcvd */
+ if (type == LDD_F_SV_TYPE_MDT &&
+ !(lsd->lsd_feature_compat & OBD_COMPAT_20)) {
+ if (last_rcvd_size > lsd->lsd_client_start) {
+ LCONSOLE_WARN("%s: mounting at first time on 1.8 FS, "
+ "remove all clients for interop needs\n",
+ tgt_name(tgt));
+ rc = tgt_truncate_object(env, tgt, tgt->lut_last_rcvd,
+ lsd->lsd_client_start);
+ if (rc)
+ RETURN(rc);
+ last_rcvd_size = lsd->lsd_client_start;
+ }
+ /** set 2.0 flag to upgrade/downgrade between 1.8 and 2.0 */
+ lsd->lsd_feature_compat |= OBD_COMPAT_20;
+ }
+
+ spin_lock(&tgt->lut_translock);
+ tgt->lut_last_transno = lsd->lsd_last_transno;
+ spin_unlock(&tgt->lut_translock);
+
+ lsd->lsd_mount_count++;
+
+ CDEBUG(D_INODE, "=======,=BEGIN DUMPING LAST_RCVD========\n");
+ CDEBUG(D_INODE, "%s: server last_transno: %llu\n",
+ tgt_name(tgt), tgt->lut_last_transno);
+ CDEBUG(D_INODE, "%s: server mount_count: %llu\n",
+ tgt_name(tgt), lsd->lsd_mount_count);
+ CDEBUG(D_INODE, "%s: server data size: %u\n",
+ tgt_name(tgt), lsd->lsd_server_size);
+ CDEBUG(D_INODE, "%s: per-client data start: %u\n",
+ tgt_name(tgt), lsd->lsd_client_start);
+ CDEBUG(D_INODE, "%s: per-client data size: %u\n",
+ tgt_name(tgt), lsd->lsd_client_size);
+ CDEBUG(D_INODE, "%s: last_rcvd size: %lu\n",
+ tgt_name(tgt), last_rcvd_size);
+ CDEBUG(D_INODE, "%s: server subdir_count: %u\n",
+ tgt_name(tgt), lsd->lsd_subdir_count);
+ CDEBUG(D_INODE, "%s: last_rcvd clients: %lu\n", tgt_name(tgt),
+ last_rcvd_size <= lsd->lsd_client_start ? 0 :
+ (last_rcvd_size - lsd->lsd_client_start) /
+ lsd->lsd_client_size);
+ CDEBUG(D_INODE, "========END DUMPING LAST_RCVD========\n");
+
+ if (lsd->lsd_server_size == 0 || lsd->lsd_client_start == 0 ||
+ lsd->lsd_client_size == 0) {
+ CERROR("%s: bad last_rcvd contents!\n", tgt_name(tgt));
+ RETURN(-EINVAL);
+ }
+
+ if (!tgt->lut_obd->obd_replayable)
+ CWARN("%s: recovery support OFF\n", tgt_name(tgt));
+
+ rc = tgt_clients_data_init(env, tgt, last_rcvd_size);
+ if (rc < 0)
+ GOTO(err_client, rc);
+
+ spin_lock(&tgt->lut_translock);
+ /* obd_last_committed is used for compatibility
+ * with other lustre recovery code */
+ tgt->lut_obd->obd_last_committed = tgt->lut_last_transno;
+ spin_unlock(&tgt->lut_translock);
+
+ obd2obt(tgt->lut_obd)->obt_mount_count = lsd->lsd_mount_count;
+ obd2obt(tgt->lut_obd)->obt_instance = (__u32)lsd->lsd_mount_count;
+
+ /* save it, so mount count and last_transno is current */
+ rc = tgt_server_data_update(env, tgt, 0);
+ if (rc < 0)
+ GOTO(err_client, rc);
+
+ RETURN(0);
+
+err_client:
+ class_disconnect_exports(tgt->lut_obd);
+ return rc;
+}
+
+/* add credits for last_rcvd update */
+int tgt_txn_start_cb(const struct lu_env *env, struct thandle *th,
+ void *cookie)
+{
+ struct lu_target *tgt = cookie;
+ struct tgt_session_info *tsi;
+ struct tgt_thread_info *tti = tgt_th_info(env);
+ struct dt_object *dto;
+ int rc;
+
+ /* For readonly case, the caller should have got failure
+ * when start the transaction. If the logic comes here,
+ * there must be something wrong. */
+ if (unlikely(tgt->lut_bottom->dd_rdonly)) {
+ dump_stack();
+ LBUG();
+ }
+
+ /* if there is no session, then this transaction is not result of
+ * request processing but some local operation */
+ if (env->le_ses == NULL)
+ return 0;
+
+ LASSERT(tgt->lut_last_rcvd);
+ tsi = tgt_ses_info(env);
+ /* OFD may start transaction without export assigned */
+ if (tsi->tsi_exp == NULL)
+ return 0;
+
+ if (tgt_is_multimodrpcs_client(tsi->tsi_exp)) {
+ /*
+ * Use maximum possible file offset for declaration to ensure
+ * ZFS will reserve enough credits for a write anywhere in this
+ * file, since we don't know where in the file the write will be
+ * because a replay slot has not been assigned. This should be
+ * replaced by dmu_tx_hold_append() when available.
+ */
+ tti->tti_buf.lb_buf = NULL;
+ tti->tti_buf.lb_len = sizeof(struct lsd_reply_data);
+ dto = dt_object_locate(tgt->lut_reply_data, th->th_dev);
+ rc = dt_declare_record_write(env, dto, &tti->tti_buf, -1, th);
+ if (rc)
+ return rc;
+ } else {
+ dto = dt_object_locate(tgt->lut_last_rcvd, th->th_dev);
+ tti_buf_lcd(tti);
+ tti->tti_off = tsi->tsi_exp->exp_target_data.ted_lr_off;
+ rc = dt_declare_record_write(env, dto, &tti->tti_buf,
+ tti->tti_off, th);
+ if (rc)
+ return rc;
+ }
+
+ if (tsi->tsi_vbr_obj != NULL &&
+ !lu_object_remote(&tsi->tsi_vbr_obj->do_lu)) {
+ dto = dt_object_locate(tsi->tsi_vbr_obj, th->th_dev);
+ rc = dt_declare_version_set(env, dto, th);
+ if (!rc && tsi->tsi_dv_update)
+ rc = dt_declare_data_version_set(env, dto, th);
+ }
+
+ return rc;
+}
+
+/* Update last_rcvd records with latests transaction data */
+int tgt_txn_stop_cb(const struct lu_env *env, struct thandle *th,
+ void *cookie)
+{
+ struct lu_target *tgt = cookie;
+ struct tgt_session_info *tsi;
+ struct tgt_thread_info *tti = tgt_th_info(env);
+ struct dt_object *obj = NULL;
+ int rc;
+ bool echo_client;
+
+ if (env->le_ses == NULL)
+ return 0;
+
+ tsi = tgt_ses_info(env);
+ /* OFD may start transaction without export assigned */
+ if (tsi->tsi_exp == NULL)
+ return 0;
+
+ echo_client = (tgt_ses_req(tsi) == NULL && tsi->tsi_xid == 0);
+
+ if (tsi->tsi_has_trans && !echo_client && !tsi->tsi_batch_env) {
+ if (!tsi->tsi_mult_trans) {
+ CDEBUG(D_HA, "More than one transaction %llu\n",
+ tti->tti_transno);
+ /**
+ * if RPC handler sees unexpected multiple last_rcvd
+ * updates with transno, then it is better to return
+ * the latest transaction number to the client.
+ * In that case replay may fail if part of operation
+ * was committed and can't be re-applied easily. But
+ * that is better than report the first transno, in
+ * which case partially committed operation would be
+ * considered as finished so never replayed causing
+ * data loss.
+ */
+ }
+ /* we need new transno to be assigned */
+ tti->tti_transno = 0;
+ }
+
+ if (!th->th_result)
+ tsi->tsi_has_trans++;
+
+ if (tsi->tsi_vbr_obj != NULL &&
+ !lu_object_remote(&tsi->tsi_vbr_obj->do_lu)) {
+ obj = tsi->tsi_vbr_obj;
+ }
+
+ if (unlikely(echo_client)) /* echo client special case */
+ rc = tgt_last_rcvd_update_echo(env, tgt, obj, th,
+ tsi->tsi_exp);
+ else
+ rc = tgt_last_rcvd_update(env, tgt, obj, tsi->tsi_opdata, th,
+ tgt_ses_req(tsi));
+ return rc;
+}
+
+int tgt_reply_data_init(const struct lu_env *env, struct lu_target *tgt)
+{
+ struct tgt_thread_info *tti = tgt_th_info(env);
+ struct lsd_reply_data *lrd = &tti->tti_lrd;
+ unsigned long reply_data_size;
+ int rc;
+ struct lsd_reply_header *lrh = &tgt->lut_reply_header;
+ struct tg_reply_data *trd = NULL;
+ int idx;
+ loff_t off;
+ struct cfs_hash *hash = NULL;
+ struct obd_export *exp;
+ struct tg_export_data *ted;
+ int reply_data_recovered = 0;
+
+ rc = dt_attr_get(env, tgt->lut_reply_data, &tti->tti_attr);
+ if (rc)
+ GOTO(out, rc);
+ reply_data_size = (unsigned long)tti->tti_attr.la_size;
+
+ if (reply_data_size == 0) {
+ CDEBUG(D_INFO, "%s: new reply_data file, initializing\n",
+ tgt_name(tgt));
+ lrh->lrh_magic = LRH_MAGIC;
+ lrh->lrh_header_size = sizeof(struct lsd_reply_header);
+ if (lrh->lrh_magic == LRH_MAGIC_V1)
+ lrh->lrh_reply_size = sizeof(struct lsd_reply_data_v1);
+ else
+ lrh->lrh_reply_size = sizeof(struct lsd_reply_data_v2);
+ rc = tgt_reply_header_write(env, tgt, lrh);
+ if (rc) {
+ CERROR("%s: error writing %s: rc = %d\n",
+ tgt_name(tgt), REPLY_DATA, rc);
+ GOTO(out, rc);
+ }
+ } else {
+ __u32 recsz = sizeof(*lrd);
+ const char *lrd_ver = "v2";
+
+ rc = tgt_reply_header_read(env, tgt, lrh);
+ if (rc) {
+ CERROR("%s: error reading %s: rc = %d\n",
+ tgt_name(tgt), REPLY_DATA, rc);
+ GOTO(out, rc);
+ }
+
+ switch (lrh->lrh_magic) {
+#if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 5, 53, 0)
+ /* The old reply_data is replaced on the first mount after
+ * an upgrade, so no need to keep this interop code forever.
+ */
+ case LRH_MAGIC_V1:
+ recsz = sizeof(struct lsd_reply_data_v1);
+ lrd_ver = "v1";
+
+ if (lrh->lrh_magic != LRH_MAGIC)
+ CWARN("%s: %s record size will be %s\n",
+ tgt_name(tgt), REPLY_DATA,
+ lrh->lrh_magic < LRH_MAGIC ?
+ "upgraded" : "downgraded");
+ fallthrough;
+#endif
+ case LRH_MAGIC_V2:
+ if (lrh->lrh_header_size != sizeof(*lrh)) {
+ CERROR("%s: bad %s %s header size: %u != %lu\n",
+ tgt_name(tgt), REPLY_DATA, lrd_ver,
+ lrh->lrh_header_size, sizeof(*lrh));
+ GOTO(out, rc = -EINVAL);
+ }
+ if (lrh->lrh_reply_size != recsz) {
+ CERROR("%s: bad %s %s reply size: %u != %u\n",
+ tgt_name(tgt), REPLY_DATA, lrd_ver,
+ lrh->lrh_reply_size, recsz);
+ GOTO(out, rc = -EINVAL);
+ }
+ break;
+ default:
+ CERROR("%s: invalid %s magic: %x != %x/%x\n",
+ tgt_name(tgt), REPLY_DATA,
+ lrh->lrh_magic, LRH_MAGIC_V1, LRH_MAGIC_V2);
+ GOTO(out, rc = -EINVAL);
+ }
+
+ hash = cfs_hash_getref(tgt->lut_obd->obd_gen_hash);
+ if (hash == NULL)
+ GOTO(out, rc = -ENODEV);
+
+ OBD_ALLOC_PTR(trd);
+ if (trd == NULL)
+ GOTO(out, rc = -ENOMEM);
+
+ /* Load reply_data from disk */
+ for (idx = 0, off = lrh->lrh_header_size;
+ off < reply_data_size; idx++, off += recsz) {
+ rc = tgt_reply_data_read(env, tgt, lrd, off, lrh);
+ if (rc) {
+ CERROR("%s: error reading %s: rc = %d\n",
+ tgt_name(tgt), REPLY_DATA, rc);
+ GOTO(out, rc);
+ }
+
+ exp = cfs_hash_lookup(hash, &lrd->lrd_client_gen);
+ if (exp == NULL) {
+ /* old reply data from a disconnected client */
+ continue;
+ }
+ ted = &exp->exp_target_data;
+ mutex_lock(&ted->ted_lcd_lock);
+
+ /* create in-memory reply_data and link it to
+ * target export's reply list */
+ rc = tgt_set_reply_slot(tgt, idx);
+ if (rc != 0) {
+ mutex_unlock(&ted->ted_lcd_lock);
+ GOTO(out, rc);
+ }
+ trd->trd_reply = *lrd;
+ trd->trd_pre_versions[0] = 0;
+ trd->trd_pre_versions[1] = 0;
+ trd->trd_pre_versions[2] = 0;
+ trd->trd_pre_versions[3] = 0;
+ trd->trd_index = idx;
+ trd->trd_tag = 0;
+ fid_zero(&trd->trd_object);
+ list_add(&trd->trd_list, &ted->ted_reply_list);
+ ted->ted_reply_cnt++;
+ if (ted->ted_reply_cnt > ted->ted_reply_max)
+ ted->ted_reply_max = ted->ted_reply_cnt;
+
+ CDEBUG(D_HA, "%s: restore reply %p: xid %llu, "
+ "transno %llu, client gen %u, slot idx %d\n",
+ tgt_name(tgt), trd, lrd->lrd_xid,
+ lrd->lrd_transno, lrd->lrd_client_gen,
+ trd->trd_index);
+
+ /* update export last committed transation */
+ exp->exp_last_committed = max(exp->exp_last_committed,
+ lrd->lrd_transno);
+ /* Update lcd_last_transno as well for check in
+ * tgt_release_reply_data() or the latest client
+ * transno can be lost.
+ */
+ ted->ted_lcd->lcd_last_transno =
+ max(ted->ted_lcd->lcd_last_transno,
+ exp->exp_last_committed);
+
+ mutex_unlock(&ted->ted_lcd_lock);
+ class_export_put(exp);
+
+ /* update target last committed transaction */
+ spin_lock(&tgt->lut_translock);
+ tgt->lut_last_transno = max(tgt->lut_last_transno,
+ lrd->lrd_transno);
+ spin_unlock(&tgt->lut_translock);
+
+ reply_data_recovered++;
+
+ OBD_ALLOC_PTR(trd);
+ if (trd == NULL)
+ GOTO(out, rc = -ENOMEM);
+ }
+ CDEBUG(D_INFO, "%s: %d reply data have been recovered\n",
+ tgt_name(tgt), reply_data_recovered);
+ }
+
+ spin_lock(&tgt->lut_translock);
+ /* obd_last_committed is used for compatibility
+ * with other lustre recovery code */
+ tgt->lut_obd->obd_last_committed = tgt->lut_last_transno;
+ spin_unlock(&tgt->lut_translock);
+
+ rc = 0;
+
+out:
+ if (hash != NULL)
+ cfs_hash_putref(hash);
+ if (trd != NULL)
+ OBD_FREE_PTR(trd);
+ return rc;
+}
+
+static int tgt_check_lookup_req(struct ptlrpc_request *req, int lookup,
+ struct tg_reply_data *trd)
+{
+ struct tg_export_data *ted = &req->rq_export->exp_target_data;
+ struct lu_target *lut = class_exp2tgt(req->rq_export);
+ __u16 tag = lustre_msg_get_tag(req->rq_reqmsg);
+ int rc = 0;
+ struct tg_reply_data *reply;
+ bool check_increasing;
+
+ if (tag == 0)
+ return 0;
+
+ check_increasing = tgt_is_increasing_xid_client(req->rq_export) &&
+ !(lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY);
+ if (!lookup && !check_increasing)
+ return 0;
+
+ list_for_each_entry(reply, &ted->ted_reply_list, trd_list) {
+ if (lookup && reply->trd_reply.lrd_xid == req->rq_xid) {
+ rc = 1;
+ if (trd != NULL)
+ *trd = *reply;
+ break;
+ } else if (check_increasing && reply->trd_tag == tag &&
+ reply->trd_reply.lrd_xid > req->rq_xid) {
+ rc = -EPROTO;
+ CERROR("%s: busy tag=%u req_xid=%llu, trd=%p: xid=%llu transno=%llu client_gen=%u slot_idx=%d: rc = %d\n",
+ tgt_name(lut), tag, req->rq_xid, trd,
+ reply->trd_reply.lrd_xid,
+ reply->trd_reply.lrd_transno,
+ reply->trd_reply.lrd_client_gen,
+ reply->trd_index, rc);
+ break;
+ }
+ }
+
+ return rc;
+}
+
+/* Look for a reply data matching specified request @req
+ * A copy is returned in @trd if the pointer is not NULL
+ */
+int tgt_lookup_reply(struct ptlrpc_request *req, struct tg_reply_data *trd)
+{
+ struct tg_export_data *ted = &req->rq_export->exp_target_data;
+ int found = 0;
+ bool not_replay = !(lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY);
+
+ mutex_lock(&ted->ted_lcd_lock);
+ if (not_replay && req->rq_xid <= req->rq_export->exp_last_xid) {
+ /* A check for the last_xid is needed here in case there is
+ * no reply data is left in the list. It may happen if another
+ * RPC on another slot increased the last_xid between our
+ * process_req_last_xid & tgt_lookup_reply calls */
+ found = -EPROTO;
+ } else {
+ found = tgt_check_lookup_req(req, 1, trd);
+ }
+ mutex_unlock(&ted->ted_lcd_lock);
+
+ CDEBUG(D_TRACE, "%s: lookup reply xid %llu, found %d last_xid %llu\n",
+ tgt_name(class_exp2tgt(req->rq_export)), req->rq_xid, found,
+ req->rq_export->exp_last_xid);
+
+ return found;
+}
+EXPORT_SYMBOL(tgt_lookup_reply);
+
+int tgt_handle_received_xid(struct obd_export *exp, __u64 rcvd_xid)
+{
+ struct tg_export_data *ted = &exp->exp_target_data;
+ struct lu_target *lut = class_exp2tgt(exp);
+ struct tg_reply_data *trd, *tmp;
+
+
+ list_for_each_entry_safe(trd, tmp, &ted->ted_reply_list, trd_list) {
+ if (trd->trd_reply.lrd_xid > rcvd_xid)
+ continue;
+ ted->ted_release_xid++;
+ tgt_release_reply_data(lut, ted, trd);
+ }
+
+ return 0;
+}
+
+int tgt_handle_tag(struct ptlrpc_request *req)
+{
+ return tgt_check_lookup_req(req, 0, NULL);
+}
+