/** BEGIN COPYRIGHT BLOCK
 * Copyright (C) 2020 Red Hat, Inc.
 * All rights reserved.
 *
 * License: GPL (version 3 or any later version).
 * See LICENSE for details.
 * END COPYRIGHT BLOCK **/

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

/*
 * the threads that make up an import:
 * producer (1)
 * foreman (1)
 * worker (N: 1 for each index)
 *
 * a wire import (aka "fast replica" import) won't have a producer thread.
 */

#include "bdb_layer.h"
#include "../vlv_srch.h"

#define indextype_EQUALITY "eq"

static void bdb_import_wait_for_space_in_fifo(ImportJob *job, size_t new_esize);
static int bdb_import_get_and_add_parent_rdns(ImportWorkerInfo *info, ldbm_instance *inst, DB *db, ID id, ID *total_id, Slapi_RDN *srdn, int *curr_entry);
static int _get_import_entryusn(ImportJob *job, Slapi_Value **usn_value);

static struct backentry *
bdb_import_make_backentry(Slapi_Entry *e, ID id)
{
    struct backentry *ep = backentry_alloc();

    if (NULL != ep) {
        ep->ep_entry = e;
        ep->ep_id = id;
    }
    return ep;
}

static void
bdb_import_decref_entry(struct backentry *ep)
{
    PR_AtomicDecrement(&(ep->ep_refcnt));
    PR_ASSERT(ep->ep_refcnt >= 0);
}

/* generate uniqueid if requested */
static int
bdb_import_generate_uniqueid(ImportJob *job, Slapi_Entry *e)
{
    const char *uniqueid = slapi_entry_get_uniqueid(e);
    int rc = UID_SUCCESS;

    if (!uniqueid && (job->uuid_gen_type != SLAPI_UNIQUEID_GENERATE_NONE)) {
        char *newuniqueid;

        /* generate id based on dn */
        if (job->uuid_gen_type == SLAPI_UNIQUEID_GENERATE_NAME_BASED) {
            char *dn = slapi_entry_get_dn(e);

            rc = slapi_uniqueIDGenerateFromNameString(&newuniqueid,
                                                      job->uuid_namespace, dn, strlen(dn));
        } else {
            /* time based */
            rc = slapi_uniqueIDGenerateString(&newuniqueid);
        }

        if (rc == UID_SUCCESS) {
            slapi_entry_set_uniqueid(e, newuniqueid);
        } else {
            slapi_log_err(SLAPI_LOG_ERR, "bdb_import_generate_uniqueid",
                          "Failed to generate uniqueid for %s; error=%d.\n",
                          slapi_entry_get_dn_const(e), rc);
        }
    }

    return (rc);
}

/*
 * Check if the tombstonecsn is missing, if so add it.
 */
static void
bdb_import_generate_tombstone_csn(Slapi_Entry *e)
{
    if (e->e_flags & SLAPI_ENTRY_FLAG_TOMBSTONE) {
        if (attrlist_find(e->e_attrs, SLAPI_ATTR_TOMBSTONE_CSN) == NULL) {
            const CSN *tombstone_csn = NULL;
            char tombstone_csnstr[CSN_STRSIZE];

            /* Add the tombstone csn str */
            if ((tombstone_csn = entry_get_deletion_csn(e))) {
                csn_as_string(tombstone_csn, PR_FALSE, tombstone_csnstr);
                slapi_entry_add_string(e, SLAPI_ATTR_TOMBSTONE_CSN, tombstone_csnstr);
            }
        }
    }
}


/**********  BETTER LDIF PARSER  **********/


/* like the function in libldif, except this one doesn't need to use
 * FILE (which breaks on various platforms for >4G files or large numbers
 * of open files)
 */
#define LDIF_BUFFER_SIZE 8192

typedef struct
{
    char *b;       /* buffer */
    size_t size;   /* how full the buffer is */
    size_t offset; /* where the current entry starts */
} ldif_context;

static void
bdb_import_init_ldif(ldif_context *c)
{
    c->size = c->offset = 0;
    c->b = NULL;
}

static void
bdb_import_free_ldif(ldif_context *c)
{
    if (c->b)
        FREE(c->b);
    bdb_import_init_ldif(c);
}

static char *
bdb_import_get_entry(ldif_context *c, int fd, int *lineno)
{
    int ret;
    int done = 0, got_lf = 0;
    size_t bufSize = 0, bufOffset = 0, i;
    char *buf = NULL;

    while (!done) {

        /* If there's no data in the buffer, get some */
        if ((c->size == 0) || (c->offset == c->size)) {
            /* Do we even have a buffer ? */
            if (!c->b) {
                c->b = slapi_ch_malloc(LDIF_BUFFER_SIZE);
                if (!c->b)
                    return NULL;
            }
            ret = read(fd, c->b, LDIF_BUFFER_SIZE);
            if (ret < 0) {
                /* Must be error */
                goto error;
            } else if (ret == 0) {
                /* eof */
                if (buf) {
                    /* last entry */
                    buf[bufOffset] = 0;
                    return buf;
                }
                return NULL;
            } else {
                /* read completed OK */
                c->size = ret;
                c->offset = 0;
            }
        }

        /* skip blank lines at start of entry */
        if (bufOffset == 0) {
            size_t n;
            char *p;

            for (n = c->offset, p = c->b + n; n < c->size; n++, p++) {
                if (!(*p == '\r' || *p == '\n' || *p == ' ' || *p == '\t'))
                    break;
            }
            c->offset = n;
            if (c->offset == c->size)
                continue;
        }

        i = c->offset;
        while (!done && (i < c->size)) {
            /* scan forward in the buffer, looking for the end of the entry */
            while ((i < c->size) && (c->b[i] != '\n'))
                i++;

            if ((i < c->size) && (c->b[i] == '\n')) {
                if (got_lf && ((i == 0) || ((i == 1) && (c->b[0] == '\r')))) {
                    /* saw an lf at the end of the last buffer */
                    i++, (*lineno)++;
                    done = 1;
                    got_lf = 0;
                    break;
                }
                got_lf = 0;
                (*lineno)++;
                /* is this the end?  (need another linefeed) */
                if (++i < c->size) {
                    if (c->b[i] == '\n') {
                        /* gotcha! */
                        i++, (*lineno)++;
                        done = 1;
                    } else if (c->b[i] == '\r') {
                        if (++i < c->size) {
                            if (c->b[i] == '\n') {
                                /* gotcha! (nt) */
                                i++, (*lineno)++;
                                done = 1;
                            }
                        } else {
                            got_lf = 1;
                        }
                    }
                } else {
                    /* lf at the very end of the buffer */
                    got_lf = 1;
                }
            }
        }

        /* copy what we did so far into the output buffer */
        /* (first, make sure the output buffer is large enough) */
        while (bufSize - bufOffset < i - c->offset + 1) {
            char *newbuf = NULL;
            size_t newsize = (buf ? bufSize * 2 : LDIF_BUFFER_SIZE);

            newbuf = slapi_ch_malloc(newsize);
            if (!newbuf)
                goto error;
            /* copy over the old data (if there was any) */
            if (buf) {
                memmove(newbuf, buf, bufOffset);
                slapi_ch_free((void **)&buf);
            }
            buf = newbuf;
            bufSize = newsize;
        }
        if (!buf)        /*  This test is always false but make GCC Static Analyzer happy */
            goto error;
        memmove(buf + bufOffset, c->b + c->offset, i - c->offset);
        bufOffset += (i - c->offset);
        c->offset = i;
    }

    /* add terminating NUL char */
    buf[bufOffset] = 0;
    return buf;

error:
    if (buf)
        slapi_ch_free((void **)&buf);
    return NULL;
}


/**********  THREADS  **********/

/*
 * Description:
 * 1) return the ldif version #
 * 2) replace "version: 1" with "#ersion: 1"
 *    to pretend like a comment for the str2entry
 */
static int
bdb_import_get_version(char *str)
{
    char *s;
    char *mystr, *ms;
    int offset;
    int my_version = 0;

    if ((s = strstr(str, "version:")) == NULL)
        return 0;

    offset = s - str;
    mystr = ms = slapi_ch_strdup(str);
    while ((s = ldif_getline(&ms)) != NULL) {
        struct berval type = {0, NULL}, value = {0, NULL};
        int freeval = 0;
        if (slapi_ldif_parse_line(s, &type, &value, &freeval) >= 0) {
            if (!PL_strncasecmp(type.bv_val, "version", type.bv_len)) {
                my_version = atoi(value.bv_val);
                *(str + offset) = '#';
                /* the memory below was not allocated by the slapi_ch_ functions */
                if (freeval)
                    slapi_ch_free_string(&value.bv_val);
                break;
            }
        }
        /* the memory below was not allocated by the slapi_ch_ functions */
        if (freeval)
            slapi_ch_free_string(&value.bv_val);
    }

    slapi_ch_free((void **)&mystr);
    return my_version;
}

/*
 * add CreatorsName, ModifiersName, CreateTimestamp, ModifyTimestamp to entry
 */
static void
bdb_import_add_created_attrs(Slapi_Entry *e)
{
    char buf[SLAPI_TIMESTAMP_BUFSIZE];
    struct berval bv;
    struct berval *bvals[2];

    bvals[0] = &bv;
    bvals[1] = NULL;

    bv.bv_val = "";
    bv.bv_len = 0;
    if (!attrlist_find(e->e_attrs, "creatorsname")) {
        slapi_entry_attr_replace(e, "creatorsname", bvals);
    }
    if (!attrlist_find(e->e_attrs, "modifiersname")) {
        slapi_entry_attr_replace(e, "modifiersname", bvals);
    }

    slapi_timestamp_utc_hr(buf, SLAPI_TIMESTAMP_BUFSIZE);

    bv.bv_val = buf;
    bv.bv_len = strlen(bv.bv_val);
    if (!attrlist_find(e->e_attrs, "createtimestamp")) {
        slapi_entry_attr_replace(e, "createtimestamp", bvals);
    }
    if (!attrlist_find(e->e_attrs, "modifytimestamp")) {
        slapi_entry_attr_replace(e, "modifytimestamp", bvals);
    }
}

/* producer thread:
 * read through the given file list, parsing entries (str2entry), assigning
 * them IDs and queueing them on the entry FIFO.  other threads will do
 * the indexing.
 */
void
bdb_import_producer(void *param)
{
    ImportWorkerInfo *info = (ImportWorkerInfo *)param;
    ImportJob *job = info->job;
    ID id = job->first_ID, id_filestart = id;
    Slapi_Entry *e = NULL;
    struct backentry *ep = NULL, *old_ep = NULL;
    ldbm_instance *inst = job->inst;
    backend *be = inst->inst_be;
    PRIntervalTime sleeptime;
    char *estr = NULL;
    int str2entry_flags = 0;
    int finished = 0;
    int detected_eof = 0;
    int fd, curr_file, curr_lineno = 0;
    char *curr_filename = NULL;
    int idx;
    ldif_context c = {0};
    int my_version = 0;
    size_t newesize = 0;
    Slapi_Attr *attr = NULL;

    PR_ASSERT(info != NULL);
    PR_ASSERT(inst != NULL);

    if (job->flags & FLAG_ABORT) {
        goto error;
    }

    sleeptime = PR_MillisecondsToInterval(import_sleep_time);

    /* pause until we're told to run */
    while ((info->command == PAUSE) && !(job->flags & FLAG_ABORT)) {
        info->state = WAITING;
        DS_Sleep(sleeptime);
    }
    info->state = RUNNING;
    bdb_import_init_ldif(&c);

    /* Get entryusn, if needed. */
    _get_import_entryusn(job, &(job->usn_value));

    /* jumpstart by opening the first file */
    curr_file = 0;
    fd = -1;
    detected_eof = finished = 0;

    /* we loop around reading the input files and processing each entry
     * as we read it.
     */
    while (!finished) {
        int flags = 0;
        int prev_lineno = 0;
        int lines_in_entry = 0;
        int syntax_err = 0;

        if (job->flags & FLAG_ABORT) {
            goto error;
        }

        /* move on to next file? */
        if (detected_eof) {
            /* check if the file can still be read, whine if so... */
            if (read(fd, (void *)&idx, 1) > 0) {
                import_log_notice(job, SLAPI_LOG_WARNING, "bdb_import_producer", "Unexpected end of file found "
                                                                             "at line %d of file \"%s\"",
                                  curr_lineno,
                                  curr_filename);
            }

            if (fd == STDIN_FILENO) {
                import_log_notice(job, SLAPI_LOG_INFO, "bdb_import_producer", "Finished scanning file stdin (%lu "
                                                                          "entries)",
                                  (u_long)(id - id_filestart));
            } else {
                import_log_notice(job, SLAPI_LOG_INFO, "bdb_import_producer", "Finished scanning file \"%s\" (%lu "
                                                                          "entries)",
                                  curr_filename, (u_long)(id - id_filestart));
            }
            close(fd);
            fd = -1;
            detected_eof = 0;
            id_filestart = id;
            curr_file++;
            if (job->task) {
                job->task->task_progress++;
                slapi_task_status_changed(job->task);
            }
            if (job->input_filenames[curr_file] == NULL) {
                /* done! */
                finished = 1;
                break;
            }
        }

        /* separate from above, because this is also triggered when we
         * start (to open the first file)
         */
        if (fd < 0) {
            curr_lineno = 0;
            curr_filename = job->input_filenames[curr_file];
            if (strcmp(curr_filename, "-") == 0) {
                fd = STDIN_FILENO;
            } else {
                int o_flag = O_RDONLY;
                fd = bdb_open_huge_file(curr_filename, o_flag, 0);
            }
            if (fd < 0) {
                import_log_notice(job, SLAPI_LOG_ERR, "bdb_import_producer",
                                  "Could not open LDIF file \"%s\", errno %d (%s)",
                                  curr_filename, errno, slapd_system_strerror(errno));
                goto error;
            }
            if (fd == STDIN_FILENO) {
                import_log_notice(job, SLAPI_LOG_INFO, "bdb_import_producer", "Processing file stdin");
            } else {
                import_log_notice(job, SLAPI_LOG_INFO, "bdb_import_producer",
                                  "Processing file \"%s\"", curr_filename);
            }
        }
        if (job->flags & FLAG_ABORT) {
            goto error;
        }

        str2entry_flags = SLAPI_STR2ENTRY_TOMBSTONE_CHECK |
                          SLAPI_STR2ENTRY_REMOVEDUPVALS |
                          SLAPI_STR2ENTRY_EXPAND_OBJECTCLASSES |
                          SLAPI_STR2ENTRY_ADDRDNVALS |
                          SLAPI_STR2ENTRY_NOT_WELL_FORMED_LDIF;

        while ((info->command == PAUSE) && !(job->flags & FLAG_ABORT)) {
            info->state = WAITING;
            DS_Sleep(sleeptime);
        }
        info->state = RUNNING;

        prev_lineno = curr_lineno;
        estr = bdb_import_get_entry(&c, fd, &curr_lineno);

        lines_in_entry = curr_lineno - prev_lineno;
        if (!estr) {
            /* error reading entry, or end of file */
            detected_eof = 1;
            continue;
        }

        if (0 == my_version && 0 == strncmp(estr, "version:", 8)) {
            my_version = bdb_import_get_version(estr);
            str2entry_flags |= SLAPI_STR2ENTRY_INCLUDE_VERSION_STR;
        }

        /* If there are more than so many lines in the entry, we tell
         * str2entry to optimize for a large entry.
         */
        if (lines_in_entry > STR2ENTRY_ATTRIBUTE_PRESENCE_CHECK_THRESHOLD) {
            flags = str2entry_flags | SLAPI_STR2ENTRY_BIGENTRY;
        } else {
            flags = str2entry_flags;
        }
        if (!(str2entry_flags & SLAPI_STR2ENTRY_INCLUDE_VERSION_STR)) {
            char *dn = NULL;
            char *normdn = NULL;
            int rc = 0; /* estr should start with "dn: " or "dn:: " */
            if (strncmp(estr, "dn: ", 4) &&
                NULL == strstr(estr, "\ndn: ") && /* in case comments precedes
                                                     the entry */
                strncmp(estr, "dn:: ", 5) &&
                NULL == strstr(estr, "\ndn:: ")) { /* ditto */
                import_log_notice(job, SLAPI_LOG_WARNING, "bdb_import_producer",
                                  "Skipping bad LDIF entry (not starting with \"dn: \") ending line %d of file \"%s\"",
                                  curr_lineno, curr_filename);
                FREE(estr);
                continue;
            }
            /* get_value_from_string decodes base64 if it is encoded. */
            rc = get_value_from_string((const char *)estr, "dn", &dn);
            if (rc) {
                import_log_notice(job, SLAPI_LOG_WARNING, "bdb_import_producer",
                                  "Skipping bad LDIF entry (dn has no value\n");
                FREE(estr);
                continue;
            }
            normdn = slapi_create_dn_string("%s", dn);
            slapi_ch_free_string(&dn);
            e = slapi_str2entry_ext(normdn, NULL, estr,
                                    flags | SLAPI_STR2ENTRY_NO_ENTRYDN);
            slapi_ch_free_string(&normdn);
        }
        FREE(estr);
        if (!e) {
            if (!(str2entry_flags & SLAPI_STR2ENTRY_INCLUDE_VERSION_STR)) {
                import_log_notice(job, SLAPI_LOG_WARNING, "bdb_import_producer",
                                  "Skipping bad LDIF entry ending line %d of file \"%s\"",
                                  curr_lineno, curr_filename);
            }
            continue;
        }
        /* From here, e != NULL */
        if (0 == my_version) {
            /* after the first entry version string won't be given */
            my_version = -1;
        }

        if (!bdb_import_entry_belongs_here(e, inst->inst_be)) {
            /* silently skip */
            slapi_entry_free(e);
            continue;
        }

        if (slapi_entry_schema_check(NULL, e) != 0) {
            import_log_notice(job, SLAPI_LOG_WARNING, "bdb_import_producer",
                              "Skipping entry \"%s\" which violates schema, ending line %d of file \"%s\"",
                              slapi_entry_get_dn(e), curr_lineno, curr_filename);
            slapi_entry_free(e);

            job->skipped++;
            continue;
        }

        /* If we are importing pre-encrypted attributes, we need
         * to skip syntax checks for the encrypted values. */
        if (!(job->encrypt) && inst->attrcrypt_configured) {
            Slapi_Entry *e_copy = NULL;

            /* Scan through the entry to see if any present
             * attributes are configured for encryption. */
            slapi_entry_first_attr(e, &attr);
            while (attr) {
                char *type = NULL;
                struct attrinfo *ai = NULL;

                slapi_attr_get_type(attr, &type);

                /* Check if this type is configured for encryption. */
                ainfo_get(be, type, &ai);
                if (ai->ai_attrcrypt != NULL) {
                    /* Make a copy of the entry to use for syntax
                     * checking if a copy has not been made yet. */
                    if (e_copy == NULL) {
                        e_copy = slapi_entry_dup(e);
                    }

                    /* Delete the enrypted attribute from the copy. */
                    slapi_entry_attr_delete(e_copy, type);
                }

                slapi_entry_next_attr(e, attr, &attr);
            }

            if (e_copy) {
                syntax_err = slapi_entry_syntax_check(NULL, e_copy, 0);
                slapi_entry_free(e_copy);
            } else {
                syntax_err = slapi_entry_syntax_check(NULL, e, 0);
            }
        } else {
            syntax_err = slapi_entry_syntax_check(NULL, e, 0);
        }

        /* Check attribute syntax */
        if (syntax_err != 0) {
            import_log_notice(job, SLAPI_LOG_WARNING, "bdb_import_producer",
                              "Skipping entry \"%s\" which violates attribute syntax, ending line %d of "
                              "file \"%s\"",
                              slapi_entry_get_dn(e), curr_lineno, curr_filename);
            slapi_entry_free(e);

            job->skipped++;
            continue;
        }

        /* generate uniqueid if necessary */
        if (bdb_import_generate_uniqueid(job, e) != UID_SUCCESS) {
            goto error;
        }

        if (g_get_global_lastmod()) {
            bdb_import_add_created_attrs(e);
        }
        /* Add nsTombstoneCSN to tombstone entries unless it's already present */
        bdb_import_generate_tombstone_csn(e);

        ep = bdb_import_make_backentry(e, id);
        if ((ep == NULL) || (ep->ep_entry == NULL)) {
            slapi_entry_free(e);
            backentry_free(&ep);
            goto error;
        }

        /* check for include/exclude subtree lists */
        if (!bdb_back_ok_to_dump(backentry_get_ndn(ep),
                                  job->include_subtrees,
                                  job->exclude_subtrees)) {
            backentry_free(&ep);
            continue;
        }

        /* not sure what this does, but it looked like it could be
         * simplified.  if it's broken, it's my fault.  -robey
         */
        if (slapi_entry_attr_find(ep->ep_entry, "userpassword", &attr) == 0) {
            Slapi_Value **va = attr_get_present_values(attr);

            pw_encodevals((Slapi_Value **)va); /* jcm - cast away const */
        }

        if (job->flags & FLAG_ABORT) {
            backentry_free(&ep);
            goto error;
        }

        /* if usn_value is available AND the entry does not have it, */
        if (job->usn_value && slapi_entry_attr_find(ep->ep_entry,
                                                    SLAPI_ATTR_ENTRYUSN, &attr)) {
            slapi_entry_add_value(ep->ep_entry, SLAPI_ATTR_ENTRYUSN,
                                  job->usn_value);
        }

        /* Now we have this new entry, all decoded
         * Next thing we need to do is:
         * (1) see if the appropriate fifo location contains an
         *     entry which had been processed by the indexers.
         *     If so, proceed.
         *     If not, spin waiting for it to become free.
         * (2) free the old entry and store the new one there.
         * (3) Update the job progress indicators so the indexers
         *     can use the new entry.
         */
        idx = id % job->fifo.size;
        old_ep = job->fifo.item[idx].entry;
        if (old_ep) {
            /* for the slot to be recycled, it needs to be already absorbed
             * by the foreman (id >= ready_EID), and all the workers need to
             * be finished with it (refcount = 0).
             */
            while (((old_ep->ep_refcnt > 0) ||
                    (old_ep->ep_id >= job->ready_EID)) &&
                   (info->command != ABORT) && !(job->flags & FLAG_ABORT)) {
                info->state = WAITING;
                DS_Sleep(sleeptime);
            }
            if (job->flags & FLAG_ABORT) {
                backentry_free(&ep);
                goto error;
            }
            info->state = RUNNING;
            PR_ASSERT(old_ep == job->fifo.item[idx].entry);
            job->fifo.item[idx].entry = NULL;
            if (job->fifo.c_bsize > job->fifo.item[idx].esize)
                job->fifo.c_bsize -= job->fifo.item[idx].esize;
            else
                job->fifo.c_bsize = 0;
            backentry_free(&old_ep);
        }

        newesize = (slapi_entry_size(ep->ep_entry) + sizeof(struct backentry));
        /* Check to see if we have the space in the fifo */
        /* If not, make it bigger if possible */
        if (bdb_import_fifo_validate_capacity_or_expand(job, newesize) == 1) {
            import_log_notice(job, SLAPI_LOG_WARNING, "bdb_import_producer", "Skipping entry \"%s\" "
                                                                         "ending line %d of file \"%s\"",
                              slapi_entry_get_dn(e), curr_lineno, curr_filename);
            import_log_notice(job, SLAPI_LOG_WARNING, "bdb_import_producer",
                              "REASON: entry too large (%lu bytes) for the buffer size (%lu bytes), "
                              "and we were UNABLE to expand buffer.",
                              (long unsigned int)newesize, (long unsigned int)job->fifo.bsize);
            backentry_free(&ep);
            job->skipped++;
            continue;
        }
        /* Now check if fifo has enough space for the new entry */
        if ((job->fifo.c_bsize + newesize) > job->fifo.bsize) {
            bdb_import_wait_for_space_in_fifo(job, newesize);
        }

        /* We have enough space */
        job->fifo.item[idx].filename = curr_filename;
        job->fifo.item[idx].line = curr_lineno;
        job->fifo.item[idx].entry = ep;
        job->fifo.item[idx].bad = 0;
        job->fifo.item[idx].esize = newesize;

        /* Add the entry size to total fifo size */
        job->fifo.c_bsize += ep->ep_entry ? job->fifo.item[idx].esize : 0;

        /* Update the job to show our progress */
        job->lead_ID = id;
        if ((id - info->first_ID) <= job->fifo.size) {
            job->trailing_ID = info->first_ID;
        } else {
            job->trailing_ID = id - job->fifo.size;
        }

        /* Update our progress meter too */
        info->last_ID_processed = id;
        id++;
        if (job->flags & FLAG_ABORT) {
            goto error;
        }
        if (info->command == STOP) {
            if (fd >= 0)
                close(fd);
            finished = 1;
        }
    }

    /* capture skipped entry warnings for this task */
    if((job) && (job->skipped)) {
        slapi_task_set_warning(job->task, WARN_SKIPPED_IMPORT_ENTRY);
    }

    slapi_value_free(&(job->usn_value));
    bdb_import_free_ldif(&c);
    info->state = FINISHED;
    return;

error:
    slapi_value_free(&(job->usn_value));
    info->state = ABORTED;
    bdb_import_free_ldif(&c);
}

static int
bdb_index_set_entry_to_fifo(ImportWorkerInfo *info, Slapi_Entry *e, ID id, ID *total_id, int curr_entry)
{
    int rc = -1;
    ImportJob *job = info->job;
    int idx;
    struct backentry *ep = NULL, *old_ep = NULL;
    size_t newesize = 0;
    Slapi_Attr *attr = NULL;
    PRIntervalTime sleeptime = PR_MillisecondsToInterval(import_sleep_time);

    /* generate uniqueid if necessary */
    if (bdb_import_generate_uniqueid(job, e) != UID_SUCCESS) {
        goto bail;
    }

    ep = bdb_import_make_backentry(e, id);
    if (NULL == ep) {
        goto bail;
    }

    /* not sure what this does, but it looked like it could be
     * simplified.  if it's broken, it's my fault.  -robey
     */
    if (slapi_entry_attr_find(ep->ep_entry, "userpassword", &attr) == 0) {
        Slapi_Value **va = attr_get_present_values(attr);

        pw_encodevals((Slapi_Value **)va); /* jcm - cast away const */
    }

    if (job->flags & FLAG_ABORT) {
        backentry_free(&ep);
        goto bail;
    }

    /* Now we have this new entry, all decoded
     * Next thing we need to do is:
     * (1) see if the appropriate fifo location contains an
     *     entry which had been processed by the indexers.
     *     If so, proceed.
     *     If not, spin waiting for it to become free.
     * (2) free the old entry and store the new one there.
     * (3) Update the job progress indicators so the indexers
     *     can use the new entry.
     */
    idx = (*total_id) % job->fifo.size;
    old_ep = job->fifo.item[idx].entry;
    if (old_ep) {
        /* for the slot to be recycled, it needs to be already absorbed
         * by the foreman ((*total_id) >= ready_EID), and all the workers
         * need to be finished with it (refcount = 0).
         */
        while (((old_ep->ep_refcnt > 0) || (old_ep->ep_id >= job->ready_EID)) && (info->command != ABORT) && !(job->flags & FLAG_ABORT)) {
            info->state = WAITING;
            DS_Sleep(sleeptime);
        }
        if (job->flags & FLAG_ABORT) {
            backentry_free(&ep);
            goto bail;
        }

        info->state = RUNNING;
        PR_ASSERT(old_ep == job->fifo.item[idx].entry);
        job->fifo.item[idx].entry = NULL;
        if (job->fifo.c_bsize > job->fifo.item[idx].esize) {
            job->fifo.c_bsize -= job->fifo.item[idx].esize;
        } else {
            job->fifo.c_bsize = 0;
        }
        backentry_free(&old_ep);
    }

    newesize = (slapi_entry_size(ep->ep_entry) + sizeof(struct backentry));
    if (bdb_import_fifo_validate_capacity_or_expand(job, newesize) == 1) {
        import_log_notice(job, SLAPI_LOG_WARNING, "bdb_index_set_entry_to_fifo", "Skipping entry \"%s\"",
                          slapi_entry_get_dn(e));
        import_log_notice(job, SLAPI_LOG_WARNING, "bdb_index_set_entry_to_fifo", "REASON: entry too large (%lu bytes) for "
                                                                             "the buffer size (%lu bytes), and we were UNABLE to expand buffer.",
                          (long unsigned int)newesize, (long unsigned int)job->fifo.bsize);
        backentry_free(&ep);
        job->skipped++;
        rc = 0; /* go to the next loop */
    }
    /* Now check if fifo has enough space for the new entry */
    if ((job->fifo.c_bsize + newesize) > job->fifo.bsize) {
        bdb_import_wait_for_space_in_fifo(job, newesize);
    }

    /* We have enough space */
    job->fifo.item[idx].filename = ID2ENTRY LDBM_FILENAME_SUFFIX;
    job->fifo.item[idx].line = curr_entry;
    job->fifo.item[idx].entry = ep;
    job->fifo.item[idx].bad = 0;
    job->fifo.item[idx].esize = newesize;

    /* Add the entry size to total fifo size */
    job->fifo.c_bsize += ep->ep_entry ? job->fifo.item[idx].esize : 0;

    /* Update the job to show our progress */
    job->lead_ID = *total_id;
    if ((*total_id - info->first_ID) <= job->fifo.size) {
        job->trailing_ID = info->first_ID;
    } else {
        job->trailing_ID = *total_id - job->fifo.size;
    }

    /* Update our progress meter too */
    info->last_ID_processed = *total_id;
    (*total_id)++;
    rc = 0; /* done */
bail:
    return rc;
}

/* producer thread for re-indexing:
 * read id2entry, parsing entries (str2entry) (needed???), assigning
 * them IDs (again, needed???) and queueing them on the entry FIFO.
 * other threads will do the indexing -- same as in import.
 */
void
bdb_index_producer(void *param)
{
    ImportWorkerInfo *info = (ImportWorkerInfo *)param;
    ImportJob *job = info->job;
    ID id = job->first_ID;
    Slapi_Entry *e = NULL;
    ldbm_instance *inst = job->inst;
    PRIntervalTime sleeptime;
    int finished = 0;
    int rc = 0;

    /* vars for Berkeley DB */
    DB_ENV *env = NULL;
    char *id2entry = NULL;
    char *tmpid2entry = NULL;
    DB *db = NULL;
    DB *tmp_db = NULL;
    DBC *dbc = NULL;
    DBT key = {0};
    DBT data = {0};
    int db_rval = -1;
    backend *be = inst->inst_be;
    int isfirst = 1;
    int curr_entry = 0;

    PR_ASSERT(info != NULL);
    PR_ASSERT(inst != NULL);
    PR_ASSERT(be != NULL);

    if (job->flags & FLAG_ABORT)
        goto error;

    sleeptime = PR_MillisecondsToInterval(import_sleep_time);

    /* pause until we're told to run */
    while ((info->command == PAUSE) && !(job->flags & FLAG_ABORT)) {
        info->state = WAITING;
        DS_Sleep(sleeptime);
    }
    info->state = RUNNING;

    /* open id2entry with dedicated db env and db handler */
    if (bdb_get_aux_id2entry(be, &db, &env, &id2entry) != 0 ||
        db == NULL || env == NULL) {
        slapi_log_err(SLAPI_LOG_ERR, "bdb_index_producer", "Could not open id2entry\n");
        goto error;
    }
    if (job->flags & FLAG_DN2RDN) {
        /* open new id2entry for the rdn format entries */
        if (bdb_get_aux_id2entry_ext(be, &tmp_db, &env, &tmpid2entry,
                                         DBLAYER_AUX_ID2ENTRY_TMP) != 0 ||
            tmp_db == NULL || env == NULL) {
            slapi_log_err(SLAPI_LOG_ERR, "bdb_index_producer", "Could not open new id2entry\n");
            goto error;
        }
    }

    /* get a cursor to we can walk over the table */
    db_rval = db->cursor(db, NULL, &dbc, 0);
    if (db_rval || !dbc) {
        slapi_log_err(SLAPI_LOG_ERR,
                      "bdb_index_producer", "Failed to get cursor for reindexing\n");
        dblayer_release_id2entry(be, db);
        goto error;
    }

    /* we loop around reading the input files and processing each entry
     * as we read it.
     */
    finished = 0;
    while (!finished) {
        ID temp_id;

        if (job->flags & FLAG_ABORT) {
            goto error;
        }
        while ((info->command == PAUSE) && !(job->flags & FLAG_ABORT)) {
            info->state = WAITING;
            DS_Sleep(sleeptime);
        }
        info->state = RUNNING;

        key.flags = DB_DBT_MALLOC;
        data.flags = DB_DBT_MALLOC;
        if (isfirst) {
            db_rval = dbc->c_get(dbc, &key, &data, DB_FIRST);
            isfirst = 0;
        } else {
            db_rval = dbc->c_get(dbc, &key, &data, DB_NEXT);
        }

        if (0 != db_rval) {
            if (DB_NOTFOUND != db_rval) {
                slapi_log_err(SLAPI_LOG_ERR, "bdb_index_producer",
                              "%s: Failed to read database, errno=%d (%s)\n",
                              inst->inst_name, db_rval,
                              dblayer_strerror(db_rval));
                if (job->task) {
                    slapi_task_log_notice(job->task,
                                          "%s: Failed to read database, err %d (%s)",
                                          inst->inst_name, db_rval,
                                          dblayer_strerror(db_rval));
                }
            }
            break;
        }
        curr_entry++;
        temp_id = id_stored_to_internal((char *)key.data);

        /* call post-entry plugin */
        plugin_call_entryfetch_plugins((char **)&data.dptr, &data.dsize);

        char *rdn = NULL;

        /* rdn is allocated in get_value_from_string */
        rc = get_value_from_string((const char *)data.dptr, "rdn", &rdn);
        if (rc) {
            /* data.dptr may not include rdn: ..., try "dn: ..." */
            e = slapi_str2entry(data.dptr, SLAPI_STR2ENTRY_NO_ENTRYDN);
            if (job->flags & FLAG_DN2RDN) {
                int len = 0;
                int options = SLAPI_DUMP_STATEINFO | SLAPI_DUMP_UNIQUEID |
                              SLAPI_DUMP_RDN_ENTRY;
                slapi_ch_free(&(data.data));
                data.dptr = slapi_entry2str_with_options(e, &len, options);
                data.dsize = len + 1;

                /* store it in the new id2entry db file */
                rc = tmp_db->put(tmp_db, NULL, &key, &data, 0);
                if (rc) {
                    slapi_log_err(SLAPI_LOG_TRACE,
                                  "bdb_index_producer", "Converting an entry "
                                  "from dn format to rdn format failed "
                                  "(dn: %s, ID: %d)\n",
                                  slapi_entry_get_dn_const(e), temp_id);
                    slapi_ch_free(&(data.data));
                    goto error;
                }
            }
        } else {
            char *normdn = NULL;
            struct backdn *bdn = dncache_find_id(&inst->inst_dncache, temp_id);
            if (bdn) {
                /* don't free dn */
                normdn = (char *)slapi_sdn_get_dn(bdn->dn_sdn);
                CACHE_RETURN(&inst->inst_dncache, &bdn);
            } else {
                Slapi_DN *sdn = NULL;
                rc = entryrdn_lookup_dn(be, rdn, temp_id, &normdn, NULL, NULL);
                if (rc) {
                    /* We cannot use the entryrdn index;
                     * Compose dn from the entries in id2entry */
                    Slapi_RDN psrdn = {0};
                    char *pid_str = NULL;
                    char *pdn = NULL;

                    slapi_log_err(SLAPI_LOG_TRACE,
                                  "bdb_index_producer", "entryrdn is not available; "
                                  "composing dn (rdn: %s, ID: %d)\n",
                                  rdn, temp_id);
                    rc = get_value_from_string((const char *)data.dptr,
                                               LDBM_PARENTID_STR, &pid_str);
                    if (rc) {
                        rc = 0; /* assume this is a suffix */
                    } else {
                        ID pid = (ID)strtol(pid_str, (char **)NULL, 10);
                        slapi_ch_free_string(&pid_str);
                        /* if pid is larger than the current pid temp_id,
                            * the parent entry hasn't */
                        rc = bdb_import_get_and_add_parent_rdns(info, inst, db,
                                                                pid, &id,
                                                                &psrdn,
                                                                &curr_entry);
                        if (rc) {
                            slapi_log_err(SLAPI_LOG_ERR, "bdb_index_producer",
                                          "Failed to compose dn for (rdn: %s, ID: %d)\n",
                                          rdn, temp_id);
                            slapi_ch_free_string(&rdn);
                            slapi_rdn_done(&psrdn);
                            continue;
                        }
                        /* Generate DN string from Slapi_RDN */
                        rc = slapi_rdn_get_dn(&psrdn, &pdn);
                        slapi_rdn_done(&psrdn);
                        if (rc) {
                            slapi_log_err(SLAPI_LOG_ERR, "bdb_index_producer",
                                          "Failed to compose dn for (rdn: %s, ID: %d) from Slapi_RDN\n",
                                          rdn, temp_id);
                            slapi_ch_free_string(&rdn);
                            continue;
                        }
                    }
                    normdn = slapi_ch_smprintf("%s%s%s",
                                               rdn, pdn ? "," : "", pdn ? pdn : "");
                    slapi_ch_free_string(&pdn);
                }
                /* dn is not dup'ed in slapi_sdn_new_dn_byref.
                 * It's set to bdn and put in the dn cache. */
                sdn = slapi_sdn_new_normdn_byval((const char *)normdn);
                bdn = backdn_init(sdn, temp_id, 0);
                CACHE_ADD(&inst->inst_dncache, bdn, NULL);
                CACHE_RETURN(&inst->inst_dncache, &bdn);
                slapi_log_err(SLAPI_LOG_CACHE, "bdb_index_producer - ",
                              "entryrdn_lookup_dn returned: %s, "
                              "and set to dn cache\n",
                              normdn);
            }
            e = slapi_str2entry_ext(normdn, NULL, data.dptr,
                                    SLAPI_STR2ENTRY_NO_ENTRYDN);
            slapi_ch_free_string(&rdn);
            slapi_ch_free_string(&normdn);
        }

        slapi_ch_free(&(key.data));
        slapi_ch_free(&(data.data));

        rc = bdb_index_set_entry_to_fifo(info, e, temp_id, &id, curr_entry);
        if (rc) {
            goto error;
        }
        if (job->flags & FLAG_ABORT) {
            goto error;
        }
        if (info->command == STOP) {
            finished = 1;
        }
    }

    dbc->c_close(dbc);
    dbc = NULL;
    db->close(db, 0);
    if (job->flags & FLAG_DN2RDN) {
        /* remove id2entry, then rename tmp to id2entry */
        tmp_db->close(tmp_db, 0);
        rc = db_create(&db, env, 0);
        if (rc) {
            slapi_log_err(SLAPI_LOG_ERR, "bdb_index_producer",
                          "Creating db handle to remove %s failed.\n", id2entry);
            goto bail;
        }
        rc = db->remove(db, id2entry, NULL, 0);
        if (rc) {
            slapi_log_err(SLAPI_LOG_ERR, "bdb_index_producer",
                          "Removing %s failed.\n", id2entry);
            goto bail;
        }
        rc = db_create(&db, env, 0);
        if (rc) {
            slapi_log_err(SLAPI_LOG_ERR, "bdb_index_producer",
                          "Creating db handle to rename %s to %s failed.\n",
                          tmpid2entry, id2entry);
            goto bail;
        }
        rc = db->rename(db, tmpid2entry, NULL, id2entry, 0);
        if (rc) {
            slapi_log_err(SLAPI_LOG_ERR, "bdb_index_producer",
                          "Renaming %s to %s failed.\n",
                          tmpid2entry, id2entry);
            goto bail;
        }
    }
    bdb_release_aux_id2entry(be, NULL, env);
    slapi_ch_free_string(&id2entry);
    slapi_ch_free_string(&tmpid2entry);
    info->state = FINISHED;
    return;

error:
    if (dbc) {
        dbc->c_close(dbc);
    }
    if (job->flags & FLAG_DN2RDN) {
        if (tmp_db) {
            tmp_db->close(tmp_db, 0);
            rc = db_create(&tmp_db, env, 0);
            if (rc) {
                slapi_log_err(SLAPI_LOG_ERR, "bdb_index_producer",
                              "Creating db handle to remove %s s failed.\n",
                              tmpid2entry);
                goto bail;
            }
            /* remove tmp */
            rc = tmp_db->remove(tmp_db, tmpid2entry, NULL, 0);
            if (rc) {
                slapi_log_err(SLAPI_LOG_ERR, "bdb_index_producer",
                              "Removing %s failed.\n", tmpid2entry);
                goto bail;
            }
        }
    }
bail:
    bdb_release_aux_id2entry(be, db, env);
    slapi_ch_free_string(&id2entry);
    slapi_ch_free_string(&tmpid2entry);
    info->state = ABORTED;
}

struct upgradedn_attr
{
    char *ud_type;
    char *ud_value;
    struct upgradedn_attr *ud_next;
    int ud_flags;
#define OLD_DN_NORMALIZE 0x1
};

static void
bdb_upgradedn_free_list(struct upgradedn_attr **ud_list)
{
    struct upgradedn_attr *ptr = *ud_list;

    while (ptr) {
        struct upgradedn_attr *next = ptr->ud_next;
        slapi_ch_free_string(&ptr->ud_type);
        slapi_ch_free_string(&ptr->ud_value);
        slapi_ch_free((void **)&ptr);
        ptr = next;
    }
    *ud_list = NULL;
    return;
}

static void
bdb_upgradedn_add_to_list(struct upgradedn_attr **ud_list,
                      char *type,
                      char *value,
                      int flag)
{
    struct upgradedn_attr *elem =
        (struct upgradedn_attr *)slapi_ch_malloc(sizeof(struct upgradedn_attr));
    elem->ud_type = type;
    elem->ud_value = value;
    elem->ud_flags = flag;
    elem->ud_next = *ud_list;
    *ud_list = elem;
    return;
}

/*
 * Return value: count of max consecutive spaces
 */
static int
bdb_has_spaces(const char *str)
{
    char *p = (char *)str;
    char *np;
    char *endp = p + strlen(str);
    int wcnt;
    int maxwcnt = 0;
next:
    if ((np = strchr(p, ' ')) || (np = strchr(p, '\t'))) {
        wcnt = 0;
        while ((np < endp) && isspace(*np)) {
            wcnt++;
            np++;
        }
        if (maxwcnt < wcnt) {
            maxwcnt = wcnt;
        }
        p = np;
        goto next;
    } else {
        goto bail;
    }
bail:
    return maxwcnt;
}

static int
bdb_add_IDs_to_IDarray(ID ***dn_norm_sp_conflict, int *max, int i, char *strids)
{
    char *p, *next, *start;
    ID my_id;
    ID **conflict;
    ID *idp;
    ID *endp;
    size_t len;

    if ((NULL == dn_norm_sp_conflict) || (NULL == max) || (0 == *max)) {
        return 1;
    }
    p = PL_strchr(strids, ':');
    if (NULL == p) {
        slapi_log_err(SLAPI_LOG_ERR, "bdb_add_IDs_to_IDarray",
                      "Format error: no ':' in %s\n", strids);
        return 1;
    }
    *p = '\0';
    my_id = (ID)strtol(strids, (char **)NULL, 10);
    if (!my_id) {
        slapi_log_err(SLAPI_LOG_ERR, "bdb_add_IDs_to_IDarray",
                      "Invalid ID in %s\n", strids);
        return 1;
    }

    if (NULL == *dn_norm_sp_conflict) {
        *dn_norm_sp_conflict = (ID **)slapi_ch_malloc(sizeof(ID *) * *max);
    } else if (*max == i + 1) {
        *max *= 2;
        *dn_norm_sp_conflict = (ID **)slapi_ch_realloc((char *)*dn_norm_sp_conflict,
                                                       sizeof(ID *) * *max);
    }
    conflict = *dn_norm_sp_conflict;

    len = strlen(strids);
    while (isspace(*(++p)))
        ;
    start = p;
    /* since the format is "ID ID ID ...", max count is len/2 + 1 and +1 for my_id */
    conflict[i] = (ID *)slapi_ch_calloc((len / 2 + 2), sizeof(ID));
    idp = conflict[i];
    endp = idp + len / 2 + 2;
    *idp++ = my_id;
    for (p = strtok_r(start, " \n", &next); p && (idp < endp);
         p = strtok_r(NULL, " \n", &next), idp++) {
        *idp = (ID)strtol(p, (char **)NULL, 10);
    }
    if (idp < endp) {
        *idp = 0;
    } else if (idp == endp) {
        conflict[i] = (ID *)slapi_ch_realloc((char *)conflict[i],
                                             (len / 2 + 3) * sizeof(ID));
        idp = conflict[i];
        *(idp + len / 2 + 2) = 0;
    }
    conflict[i + 1] = NULL;
    return 0;
}

static void
bdb_free_IDarray(ID ***dn_norm_sp_conflict)
{
    int i;
    if ((NULL == dn_norm_sp_conflict) || (NULL == *dn_norm_sp_conflict)) {
        return;
    }
    for (i = 0; (*dn_norm_sp_conflict)[i]; i++) {
        slapi_ch_free((void **)&(*dn_norm_sp_conflict)[i]);
    }
    slapi_ch_free((void **)dn_norm_sp_conflict);
}

/*
 * dn_norm_sp_conflicts is a double array of IDs.
 * Format:
 * primary_ID0: conflict_ID ...
 * primary_ID1: conflict_ID ...
 * ...
 *
 * bdb_is_conflict_ID looks for ghe given id in hte conflict_ID lists
 * If found, its primary_ID is returned.
 * Otherwise, 0 is returned.
 */
static ID
bdb_is_conflict_ID(ID **dn_norm_sp_conflicts, int max, ID id)
{
    int i;
    ID *idp;
    for (i = 0; i < max; i++) {
        for (idp = dn_norm_sp_conflicts[i]; idp && *idp; idp++) {
            if (*idp == id) {
                return *dn_norm_sp_conflicts[i];
            }
        }
    }
    return 0;
}

/*
 * Producer thread for upgrading dn format
 * FLAG_UPGRADEDNFORMAT | FLAG_DRYRUN -- check the necessity of dn upgrade
 * FLAG_UPGRADEDNFORMAT -- execute dn upgrade
 *
 * Read id2entry,
 * Check the DN syntax attributes if it contains '\' or not AND
 * Check the RDNs of the attributes if the value is surrounded by
 * double-quotes or not.
 * If both are false, skip the entry and go to next
 * If either is true, create an entry which contains a correctly normalized
 *     DN attribute values in e_attr list and the original entrydn in the
 *     deleted attribute list e_aux_attrs.
 *
 * If FLAG_UPGRADEDNFORMAT is set, worker_threads for indexing DN syntax
 * attributes (+ cn & ou) are brought up.  Foreman thread updates entrydn
 * or entryrd index as well as the entry itself in the id2entry.db#.
 *
 * Note: QUIT state for info->state is introduced for DRYRUN mode to
 *       distinguish the intentional QUIT (found the dn upgrade candidate)
 *       from ABORTED (aborted or error) and FINISHED (scan all the entries
 *       and found no candidate to upgrade)
 */
/*
 * FLAG_UPGRADEDNFORMAT: need to take care space reduction
 * dn: cn=TEST   USER0 --> dn: cn=TEST USER0
 * If multiple DNs are found having different count of spaces,
 * remove the second and later with exporting them into ldif file.
 * In the dry run, it retrieves all the entries having spaces in dn and
 * store the DN and OID in a file.  Mark, conflicts if any.
 * In the real run, store only no conflict entries and first conflicted one.
 * The rest are stored in an ldif file.
 *
 * Cases:
 *   FLAG_DRYRUN | FLAG_UPGRADEDNFORMAT | FLAG_UPGRADEDNFORMAT_V1
 *     ==> 1 & 2-1
 *   FLAG_DRYRUN | FLAG_UPGRADEDNFORMAT_V1
 *     ==> 2-1
 *   FLAG_UPGRADEDNFORMAT | FLAG_UPGRADEDNFORMAT_V1
 *     ==> 1 & 2-2,3
 *   FLAG_UPGRADEDNFORMAT_V1
 *     ==> 2-2,3
 *
 *       1) dn normalization
 *       2) space handling
 *       2-1) upgradedn dry-run: output into a file (in the instance db dir?)
 *            format:
 *            <original dn>:OID
 *       2-2) upgrade script sorts the file; retrieve duplicated DNs
 *            <dn>:OID0
 *            <dupped dn>:OID1
 *            <dupped dn>:OID2
 *
 *            format:
 *            OID0:OID1 OID2 ...
 *       2-3) upgradedn: compare the OID with the OID1,OID2,
 *            if match, rename the rdn value to "value <entryid>".
 */
void
bdb_upgradedn_producer(void *param)
{
    ImportWorkerInfo *info = (ImportWorkerInfo *)param;
    ImportJob *job = info->job;
    ID id = job->first_ID;
    Slapi_Entry *e = NULL;
    struct backentry *ep = NULL, *old_ep = NULL;
    ldbm_instance *inst = job->inst;
    PRIntervalTime sleeptime;
    int finished = 0;
    int idx;
    int rc = 0;
    Slapi_Attr *a = NULL;
    Slapi_DN *sdn = NULL;
    char *workdn = NULL;
    struct upgradedn_attr *ud_list = NULL;
    char **ud_vals = NULL;
    char **ud_valp = NULL;
    struct upgradedn_attr *ud_ptr = NULL;
    Slapi_Attr *ud_attr = NULL;
    char *ecopy = NULL;
    char *normdn = NULL;
    char *rdn = NULL;       /* original rdn */
    int is_dryrun = 0;      /* FLAG_DRYRUN */
    int chk_dn_norm = 0;    /* FLAG_UPGRADEDNFORMAT */
    int chk_dn_norm_sp = 0; /* FLAG_UPGRADEDNFORMAT_V1 */
    ID **dn_norm_sp_conflicts = NULL;
    int do_dn_norm = 0;    /* do dn_norm */
    int do_dn_norm_sp = 0; /* do dn_norm_sp */
    int rdn_bdb_has_spaces = 0;
    int info_state = 0; /* state to add to info->state (for dryrun only) */
    int skipit = 0;
    ID pid;
    struct backdn *bdn = NULL;

    /* vars for Berkeley DB */
    DB_ENV *env = NULL;
    DB *db = NULL;
    DBC *dbc = NULL;
    DBT key = {0};
    DBT data = {0};
    int db_rval = -1;
    backend *be = inst->inst_be;
    int isfirst = 1;
    int curr_entry = 0;
    size_t newesize = 0;

    PR_ASSERT(info != NULL);
    PR_ASSERT(inst != NULL);
    PR_ASSERT(be != NULL);

    if (job->flags & FLAG_ABORT) {
        goto error;
    }

    is_dryrun = job->flags & FLAG_DRYRUN;
    chk_dn_norm = job->flags & FLAG_UPGRADEDNFORMAT;
    chk_dn_norm_sp = job->flags & FLAG_UPGRADEDNFORMAT_V1;

    if (!chk_dn_norm && !chk_dn_norm_sp) {
        /* Nothing to do... */
        slapi_log_err(SLAPI_LOG_INFO, "bdb_upgradedn_producer",
                      "UpgradeDnFormat is not required.\n");
        info->state = FINISHED;
        goto done;
    }

    sleeptime = PR_MillisecondsToInterval(import_sleep_time);

    /* pause until we're told to run */
    while ((info->command == PAUSE) && !(job->flags & FLAG_ABORT)) {
        info->state = WAITING;
        DS_Sleep(sleeptime);
    }
    info->state = RUNNING;

    /* open id2entry with dedicated db env and db handler */
    if (bdb_get_aux_id2entry(be, &db, &env, NULL) != 0 || db == NULL ||
        env == NULL) {
        slapi_log_err(SLAPI_LOG_ERR, "bdb_upgradedn_producer",
                      "Could not open id2entry\n");
        goto error;
    }

    /* get a cursor to we can walk over the table */
    db_rval = db->cursor(db, NULL, &dbc, 0);
    if (db_rval || !dbc) {
        slapi_log_err(SLAPI_LOG_ERR, "bdb_upgradedn_producer",
                      "Failed to get cursor for reindexing\n");
        dblayer_release_id2entry(be, db);
        goto error;
    }

    /* we loop around reading the input files and processing each entry
     * as we read it.
     */
    finished = 0;
    while (!finished) {
        ID temp_id;
        int dn_in_cache;

        if (job->flags & FLAG_ABORT) {
            goto error;
        }
        while ((info->command == PAUSE) && !(job->flags & FLAG_ABORT)) {
            info->state = WAITING;
            DS_Sleep(sleeptime);
        }
        info->state = RUNNING;

        slapi_ch_free(&(data.data));
        key.flags = DB_DBT_MALLOC;
        data.flags = DB_DBT_MALLOC;
        if (isfirst) {
            db_rval = dbc->c_get(dbc, &key, &data, DB_FIRST);
            isfirst = 0;
        } else {
            db_rval = dbc->c_get(dbc, &key, &data, DB_NEXT);
        }

        if (0 != db_rval) {
            if (DB_NOTFOUND == db_rval) {
                slapi_log_err(SLAPI_LOG_INFO, "bdb_upgradedn_producer",
                              "%s: Finished reading database\n", inst->inst_name);
                if (job->task) {
                    slapi_task_log_notice(job->task,
                                          "%s: Finished reading database", inst->inst_name);
                }
            } else {
                slapi_log_err(SLAPI_LOG_ERR, "bdb_upgradedn_producer", "%s: Failed to read database, "
                                                                   "errno=%d (%s)\n",
                              inst->inst_name, db_rval,
                              dblayer_strerror(db_rval));
                if (job->task) {
                    slapi_task_log_notice(job->task,
                                          "%s: Failed to read database, err %d (%s)",
                                          inst->inst_name, db_rval,
                                          dblayer_strerror(db_rval));
                }
            }
            finished = 1;
            break; /* error or done */
        }
        curr_entry++;
        temp_id = id_stored_to_internal((char *)key.data);
        slapi_ch_free(&(key.data));

        /* call post-entry plugin */
        plugin_call_entryfetch_plugins((char **)&data.dptr, &data.dsize);

        slapi_ch_free_string(&ecopy);
        ecopy = (char *)slapi_ch_malloc(data.dsize + 1);
        memcpy(ecopy, data.dptr, data.dsize);
        *(ecopy + data.dsize) = '\0';
        normdn = NULL;
        do_dn_norm = 0;
        do_dn_norm_sp = 0;
        rdn_bdb_has_spaces = 0;
        dn_in_cache = 0;

        /* original rdn is allocated in get_value_from_string */
        rc = get_value_from_string((const char *)data.dptr, "rdn", &rdn);
        if (rc) {
            /* data.dptr may not include rdn: ..., try "dn: ..." */
            e = slapi_str2entry(data.dptr,
                                SLAPI_STR2ENTRY_USE_OBSOLETE_DNFORMAT);
        } else {
            bdn = dncache_find_id(&inst->inst_dncache, temp_id);
            if (bdn) {
                /* don't free normdn */
                normdn = (char *)slapi_sdn_get_dn(bdn->dn_sdn);
                CACHE_RETURN(&inst->inst_dncache, &bdn);
                dn_in_cache = 1;
            } else {
                /* free normdn */
                rc = entryrdn_lookup_dn(be, rdn, temp_id,
                                        (char **)&normdn, NULL, NULL);
                if (rc) {
                    /* We cannot use the entryrdn index;
                     * Compose dn from the entries in id2entry */
                    Slapi_RDN psrdn = {0};
                    char *pid_str = NULL;
                    char *pdn = NULL;

                    slapi_log_err(SLAPI_LOG_TRACE, "bdb_upgradedn_producer",
                                  "entryrdn is not available; composing dn (rdn: %s, ID: %d)\n",
                                  rdn, temp_id);
                    rc = get_value_from_string((const char *)data.dptr,
                                               LDBM_PARENTID_STR, &pid_str);
                    if (rc) {
                        rc = 0; /* assume this is a suffix */
                    } else {
                        pid = (ID)strtol(pid_str, (char **)NULL, 10);
                        slapi_ch_free_string(&pid_str);
                        /* if pid is larger than the current pid temp_id,
                         * the parent entry hasn't */
                        rc = bdb_import_get_and_add_parent_rdns(info, inst, db,
                                                                pid, &id,
                                                                &psrdn,
                                                                &curr_entry);
                        if (rc) {
                            slapi_log_err(SLAPI_LOG_ERR,
                                          "upgradedn: Failed to compose dn for "
                                          "(rdn: %s, ID: %d)\n",
                                          rdn, temp_id);
                            slapi_ch_free_string(&rdn);
                            slapi_rdn_done(&psrdn);
                            continue;
                        }
                        /* Generate DN string from Slapi_RDN */
                        rc = slapi_rdn_get_dn(&psrdn, &pdn);
                        slapi_rdn_done(&psrdn);
                        if (rc) {
                            slapi_log_err(SLAPI_LOG_ERR, "bdb_upgradedn_producer",
                                          "Failed to compose dn for (rdn: %s, ID: %d) from Slapi_RDN\n",
                                          rdn, temp_id);
                            slapi_ch_free_string(&rdn);
                            continue;
                        }
                    }
                    /* free normdn */
                    normdn = slapi_ch_smprintf("%s%s%s",
                                               rdn, pdn ? "," : "", pdn ? pdn : "");
                    slapi_ch_free_string(&pdn);
                }
                if (is_dryrun) {
                    /* if not dryrun, we may change the DN, In such case,
                        * we need to put the new value to cache.*/
                    /* dn is dup'ed in slapi_sdn_new_dn_byval.
                        * It's set to bdn and put in the dn cache. */
                    /* normdn is allocated in this scope.
                        * Thus, we can just passin. */
                    sdn = slapi_sdn_new_normdn_passin(normdn);
                    bdn = backdn_init(sdn, temp_id, 0);
                    CACHE_ADD(&inst->inst_dncache, bdn, NULL);
                    CACHE_RETURN(&inst->inst_dncache, &bdn);
                    /* don't free this normdn  */
                    normdn = (char *)slapi_sdn_get_dn(sdn);
                    slapi_log_err(SLAPI_LOG_CACHE, "bdb_upgradedn_producer",
                                  "entryrdn_lookup_dn returned: %s, "
                                  "and set to dn cache\n",
                                  normdn);
                    dn_in_cache = 1;
                }
            }
            e = slapi_str2entry_ext(normdn, NULL, data.dptr,
                                    SLAPI_STR2ENTRY_USE_OBSOLETE_DNFORMAT);
            slapi_ch_free_string(&rdn);
        }

        if (NULL == e) {
            if (job->task) {
                slapi_task_log_notice(job->task,
                                      "%s: WARNING: skipping badly formatted entry (id %lu)",
                                      inst->inst_name, (u_long)temp_id);
            }
            slapi_log_err(SLAPI_LOG_WARNING, "bdb_upgradedn_producer",
                          "%s: Skipping badly formatted entry (id %lu)\n",
                          inst->inst_name, (u_long)temp_id);
            slapi_ch_free_string(&rdn);
            continue;
        }

        /* From here, e != NULL */
        /*
         * treat dn specially since the entry was generated with the flag
         * SLAPI_STR2ENTRY_USE_OBSOLETE_DNFORMAT
         * -- normalize it with the new format
         */
        if (!normdn) {
            /* No rdn in id2entry or entrydn */
            normdn = (char *)slapi_sdn_get_dn(&(e->e_sdn));
        }

        /*
         * If dryrun && check_dn_norm_sp,
         * check if rdn's containing multi spaces exist or not.
         * If any, output the DN:ID into a file INST_dn_norm_sp.txt in the
         * ldifdir. We have to continue checking all the entries.
         */
        if (chk_dn_norm_sp) {
            char *dn_id;
            char *path; /* <ldifdir>/<inst>_dn_norm_sp.txt is used for
                           the temp work file */
            /* open "path" once, and set FILE* to upgradefd */
            if (NULL == job->upgradefd) {
                /* Disable gcc -fanalyzer false positive about job->upgradefd */
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wanalyzer-malloc-leak"
#pragma GCC diagnostic ignored "-Wanalyzer-file-leak"

                char *ldifdir = config_get_ldifdir();
                if (ldifdir) {
                    path = slapi_ch_smprintf("%s/%s_dn_norm_sp.txt",
                                             ldifdir, inst->inst_name);
                    slapi_ch_free_string(&ldifdir);
                } else {
                    path = slapi_ch_smprintf("/var/tmp/%s_dn_norm_sp.txt",
                                             inst->inst_name);
                }
                if (is_dryrun) {
                    job->upgradefd = fopen(path, "w");
                    if (NULL == job->upgradefd) {
                        if (job->task) {
                            slapi_task_log_notice(job->task,
                                                  "%s: No DNs to fix.\n", inst->inst_name);
                        }
                        slapi_log_err(SLAPI_LOG_ERR, "bdb_upgradedn_producer",
                                      "%s: No DNs to fix.\n", inst->inst_name);
                        slapi_ch_free_string(&path);
                        goto bail;
                    }
                } else {
                    job->upgradefd = fopen(path, "r");
                    if (NULL == job->upgradefd) {
                        if (job->task) {
                            slapi_task_log_notice(job->task,
                                                  "%s: Error: failed to open a file \"%s\"",
                                                  inst->inst_name, path);
                        }
                        slapi_log_err(SLAPI_LOG_ERR, "bdb_upgradedn_producer",
                                      "%s: Error: failed to open a file \"%s\"\n",
                                      inst->inst_name, path);
                        slapi_ch_free_string(&path);
                        goto error;
                    }
                }
#pragma GCC diagnostic pop
            }
            slapi_ch_free_string(&path);
            if (is_dryrun) {
                rdn_bdb_has_spaces = bdb_has_spaces(rdn);
                if (rdn_bdb_has_spaces > 0) {
                    dn_id = slapi_ch_smprintf("%s:%u\n",
                                              slapi_entry_get_dn_const(e), temp_id);
                    if (EOF == fputs(dn_id, job->upgradefd)) {
                        if (job->task) {
                            slapi_task_log_notice(job->task,
                                                  "%s: Error: failed to write a line \"%s\"",
                                                  inst->inst_name, dn_id);
                        }
                        slapi_log_err(SLAPI_LOG_ERR, "bdb_upgradedn_producer",
                                      "%s: Error: failed to write a line \"%s\"\n",
                                      inst->inst_name, dn_id);
                        slapi_ch_free_string(&dn_id);
                        goto error;
                    }
                    slapi_ch_free_string(&dn_id);
                    if (rdn_bdb_has_spaces > 1) {
                        /* If an rdn containing multi spaces exists,
                         * let's check the conflict. */
                        do_dn_norm_sp = 1;
                    }
                }
            } else { /* !is_dryrun */
                /* check the oid and parentid. */
                /* Set conflict list once, and refer it laster. */
                static int my_idx = 0;
                ID alt_id;
                if (NULL == dn_norm_sp_conflicts) {
                    char buf[BUFSIZ];
                    int my_max = 8;
                    while (fgets(buf, sizeof(buf) - 1, job->upgradefd)) {
                        /* search "OID0: OID1 OID2 ... */
                        if (!isdigit(*buf) || (NULL == PL_strchr(buf, ':'))) {
                            continue;
                        }
                        if (bdb_add_IDs_to_IDarray(&dn_norm_sp_conflicts, &my_max,
                                               my_idx, buf)) {
                            slapi_log_err(SLAPI_LOG_ERR, "bdb_upgradedn_producer",
                                          "Failed to set IDs %s to conflict list\n", buf);
                            goto error;
                        }
                        my_idx++;
                    }
                }
                alt_id = bdb_is_conflict_ID(dn_norm_sp_conflicts, my_idx, temp_id);
                if (alt_id) {
                    if (alt_id != temp_id) {
                        char *newrdn = slapi_create_dn_string("%s %u", rdn, temp_id);
                        char *parentdn = slapi_dn_parent(normdn);
                        /* This entry is a conflict of alt_id */
                        slapi_log_err(SLAPI_LOG_NOTICE, "bdb_upgradedn_producer",
                                      "Entry %s (%u) is a conflict of (%u)\n",
                                      normdn, temp_id, alt_id);
                        slapi_log_err(SLAPI_LOG_NOTICE, "bdb_upgradedn_producer",
                                      "Renaming \"%s\" to \"%s\"\n", rdn, newrdn);
                        if (!dn_in_cache) {
                            /* If not in dn cache, normdn needs to be freed. */
                            slapi_ch_free_string(&normdn);
                        }
                        normdn = slapi_ch_smprintf("%s,%s", newrdn, parentdn);
                        slapi_ch_free_string(&newrdn);
                        slapi_ch_free_string(&parentdn);
                        /* Reset DN and RDN in the entry */
                        slapi_sdn_done(&(e->e_sdn));
                        slapi_sdn_init_normdn_byval(&(e->e_sdn), normdn);
                    }
                    info_state |= DN_NORM_SP;
                    bdb_upgradedn_add_to_list(&ud_list,
                                          slapi_ch_strdup(LDBM_ENTRYRDN_STR),
                                          slapi_ch_strdup(rdn), 0);
                    rc = slapi_entry_add_rdn_values(e);
                    if (rc) {
                        slapi_log_err(SLAPI_LOG_ERR, "bdb_upgradedn_producer",
                                      "%s: Failed to add rdn values to an entry: %s (id %lu)\n",
                                      inst->inst_name, normdn, (u_long)temp_id);
                        goto error;
                    }
                } /* !alt_id */
            }     /* !is_dryrun */
        }         /* if (chk_dn_norm_sp) */

        /* dn is dup'ed in slapi_sdn_new_dn_byval.
         * It's set to bdn and put in the dn cache. */
        /* Waited to put normdn into dncache until it could be modified in
         * chk_dn_norm_sp. */
        if (!dn_in_cache) {
            sdn = slapi_sdn_new_normdn_passin(normdn);
            bdn = backdn_init(sdn, temp_id, 0);
            CACHE_ADD(&inst->inst_dncache, bdn, NULL);
            CACHE_RETURN(&inst->inst_dncache, &bdn);
            slapi_log_err(SLAPI_LOG_CACHE, "bdb_upgradedn_producer",
                          "set dn %s to dn cache\n", normdn);
        }
        /* Check DN syntax attr values if it contains '\\' or not */
        /* Start from the rdn */
        if (chk_dn_norm) {
            char *endrdn = NULL;
            char *rdnp = NULL;
            endrdn = rdn + strlen(rdn) - 1;

            rdnp = PL_strchr(rdn, '=');
            if (NULL == rdnp) {
                slapi_log_err(SLAPI_LOG_WARNING, "bdb_upgradedn_producer",
                              "%s: Skipping an entry with corrupted RDN \"%s\" (id %lu)\n",
                              inst->inst_name, rdn, (u_long)temp_id);
                slapi_entry_free(e);
                e = NULL;
                continue;
            }
            /* rdn contains '\\'.  We have to update the value */
            if (PL_strchr(rdnp, '\\')) {
                do_dn_norm = 1;
            } else {
                while ((++rdnp <= endrdn) && (*rdnp == ' ' || *rdnp == '\t'))
                    ;
                /* DN contains an RDN <type>="<value>" ? */
                if ((rdnp != endrdn) && ('"' == *rdnp) && ('"' == *endrdn)) {
                    do_dn_norm = 1;
                }
            }
            if (do_dn_norm) {
                bdb_upgradedn_add_to_list(&ud_list,
                                      slapi_ch_strdup(LDBM_ENTRYRDN_STR),
                                      slapi_ch_strdup(rdn), 0);
                slapi_log_err(SLAPI_LOG_TRACE, "bdb_upgradedn_producer",
                              "%s: Found upgradedn candidate: (id %lu)\n",
                              inst->inst_name, (u_long)temp_id);
                /*
                 * In case rdn is type="<RDN>" or type=<\D\N>,
                 * add the rdn value if it's not there.
                 */
                rc = slapi_entry_add_rdn_values(e);
                if (rc) {
                    slapi_log_err(SLAPI_LOG_ERR, "bdb_upgradedn_producer",
                                  "%s: Failed to add rdn values to an entry: %s (id %lu)\n",
                                  inst->inst_name, normdn, (u_long)temp_id);
                    slapi_entry_free(e);
                    e = NULL;
                    continue;
                }
            }
            /* checking the DN sintax values in the attribute list */
            for (a = e->e_attrs; a; a = a->a_next) {
                if (!slapi_attr_is_dn_syntax_attr(a)) {
                    continue; /* not a syntax dn attr */
                }

                /* dn syntax attr */
                rc = get_values_from_string((const char *)ecopy,
                                            a->a_type, &ud_vals);
                if (rc || (NULL == ud_vals)) {
                    continue; /* empty; ignore it */
                }

                for (ud_valp = ud_vals; ud_valp && *ud_valp; ud_valp++) {
                    char **rdns = NULL;
                    char **rdnsp = NULL;
                    char *valueptr = NULL;
                    char *endvalue = NULL;
                    int isentrydn = 0;

                    /* Also check RDN contains double quoted values */
                    if (strcasecmp(a->a_type, "entrydn")) {
                        /* except entrydn */
                        workdn = slapi_ch_strdup(*ud_valp);
                        isentrydn = 0;
                    } else {
                        /* entrydn: Get Slapi DN */
                        sdn = slapi_entry_get_sdn(e);
                        workdn = slapi_ch_strdup(slapi_sdn_get_dn(sdn));
                        isentrydn = 1;
                    }
                    rdns = slapi_ldap_explode_dn(workdn, 0);
                    skipit = 0;
                    for (rdnsp = rdns; rdnsp && *rdnsp; rdnsp++) {
                        valueptr = PL_strchr(*rdnsp, '=');
                        if (NULL == valueptr) {
                            skipit = 1;
                            break;
                        }
                        endvalue = *rdnsp + strlen(*rdnsp) - 1;
                        while ((++valueptr <= endvalue) &&
                               ((' ' == *valueptr) || ('\t' == *valueptr)))
                            ;
                        if (0 == strlen(valueptr)) {
                            skipit = 1;
                            break;
                        }
                        /* DN syntax value contains an RDN <type>="<value>" or
                         * '\\' in the value ?
                         * If yes, let's upgrade the dn format. */
                        if ((('"' == *valueptr) && ('"' == *endvalue)) ||
                            PL_strchr(valueptr, '\\')) {
                            do_dn_norm = 1;
                            bdb_upgradedn_add_to_list(&ud_list,
                                                  slapi_ch_strdup(a->a_type),
                                                  slapi_ch_strdup(*ud_valp),
                                                  isentrydn ? 0 : OLD_DN_NORMALIZE);
                            slapi_log_err(SLAPI_LOG_TRACE, "bdb_upgradedn_producer",
                                          "%s: Found upgradedn candidate: %s (id %lu)\n",
                                          inst->inst_name, valueptr, (u_long)temp_id);
                            break;
                        }
                        /*
                         * else if (the rdn contains multiple spaces)?
                         * if yes, they are reduced to one.
                         * SET HAVE_MULTI_SPACES???
                         */
                    } /* for (rdnsp = rdns; rdnsp && *rdnsp; rdnsp++) */
                    if (rdns) {
                        slapi_ldap_value_free(rdns);
                    } else {
                        skipit = 1;
                    }
                    if (skipit) {
                        break;
                    }
                    slapi_ch_free_string(&workdn);
                } /* for (ud_valp = ud_vals; ud_valp && *ud_valp; ud_valp++) */
                charray_free(ud_vals);
                ud_vals = NULL;
                if (skipit) {
                    slapi_log_err(SLAPI_LOG_WARNING, "bdb_upgradedn_producer",
                                  "%s: Skipping an entry with a corrupted dn (syntax value): %s (id %lu)\n",
                                  inst->inst_name, workdn ? workdn : "unknown", (u_long)temp_id);
                    slapi_ch_free_string(&workdn);
                    bdb_upgradedn_free_list(&ud_list);
                    break;
                }
            } /* for (a = e->e_attrs; a; a = a->a_next)  */
            if (skipit) {
                bdb_upgradedn_free_list(&ud_list);
                slapi_entry_free(e);
                e = NULL;
                continue;
            }
        } /* end of if (chk_do_norm) */
        slapi_ch_free_string(&rdn);

        if (is_dryrun) {
            if (do_dn_norm) {
                info_state |= DN_NORM;
                /*
                 * If dryrun AND (found we need to do dn norm) AND
                 * (no need to check spaces),
                 * then we can quit here to return.
                 */
                if (!chk_dn_norm_sp) {
                    finished = 0; /* make it sure ... */
                    bdb_upgradedn_free_list(&ud_list);
                    slapi_entry_free(e);
                    e = NULL;
                    /* found upgrade dn candidates */
                    goto bail;
                }
            }
            if (do_dn_norm_sp) {
                info_state |= DN_NORM_SP;
            }
            /* We don't have to update dn syntax values. */
            bdb_upgradedn_free_list(&ud_list);
            slapi_entry_free(e);
            e = NULL;
            continue;
        }

        skipit = 0;
        for (ud_ptr = ud_list; ud_ptr; ud_ptr = ud_ptr->ud_next) {
            Slapi_Value *value = NULL;
            /* Move the current value to e_aux_attrs. */
            /* entryrdn is special since it does not have an attribute in db */
            if (0 == strcmp(ud_ptr->ud_type, LDBM_ENTRYRDN_STR)) {
                /* entrydn contains half normalized value in id2entry,
                   thus we have to replace it in id2entry.
                   The other DN syntax attribute values store
                   the originals.  They are taken care by the normalizer.
                 */
                a = slapi_attr_new();
                slapi_attr_init(a, ud_ptr->ud_type);
                value = slapi_value_new_string(ud_ptr->ud_value);
                slapi_attr_add_value(a, value);
                slapi_value_free(&value);
                attrlist_add(&e->e_aux_attrs, a);
            } else { /* except "entryrdn" */
                ud_attr = attrlist_find(e->e_attrs, ud_ptr->ud_type);
                if (ud_attr) {
                    /* We have to normalize the orignal string to generate
                       the key in the index.
                     */
                    a = attrlist_find(e->e_aux_attrs, ud_ptr->ud_type);
                    if (!a) {
                        a = slapi_attr_new();
                        slapi_attr_init(a, ud_ptr->ud_type);
                    } else {
                        a = attrlist_remove(&e->e_aux_attrs,
                                            ud_ptr->ud_type);
                    }
                    slapi_dn_normalize_case_original(ud_ptr->ud_value);
                    value = slapi_value_new_string(ud_ptr->ud_value);
                    slapi_attr_add_value(a, value);
                    slapi_value_free(&value);
                    attrlist_add(&e->e_aux_attrs, a);
                }
            }
        }
        bdb_upgradedn_free_list(&ud_list);

        ep = bdb_import_make_backentry(e, temp_id);
        if (!ep) {
            slapi_entry_free(e);
            e = NULL;
            goto error;
        }

        /* Add the newly case-normalized dn to entrydn in the e_attrs list. */
        add_update_entrydn_operational_attributes(ep);

        if (job->flags & FLAG_ABORT)
            goto error;

        /* Now we have this new entry, all decoded
         * Next thing we need to do is:
         * (1) see if the appropriate fifo location contains an
         *     entry which had been processed by the indexers.
         *     If so, proceed.
         *     If not, spin waiting for it to become free.
         * (2) free the old entry and store the new one there.
         * (3) Update the job progress indicators so the indexers
         *     can use the new entry.
         */
        idx = id % job->fifo.size;
        old_ep = job->fifo.item[idx].entry;
        if (old_ep) {
            /* for the slot to be recycled, it needs to be already absorbed
             * by the foreman (id >= ready_EID), and all the workers need to
             * be finished with it (refcount = 0).
             */
            while (((old_ep->ep_refcnt > 0) ||
                    (old_ep->ep_id >= job->ready_EID)) &&
                   (info->command != ABORT) && !(job->flags & FLAG_ABORT)) {
                info->state = WAITING;
                DS_Sleep(sleeptime);
            }
            if (job->flags & FLAG_ABORT)
                goto error;

            info->state = RUNNING;
            PR_ASSERT(old_ep == job->fifo.item[idx].entry);
            job->fifo.item[idx].entry = NULL;
            if (job->fifo.c_bsize > job->fifo.item[idx].esize)
                job->fifo.c_bsize -= job->fifo.item[idx].esize;
            else
                job->fifo.c_bsize = 0;
            backentry_free(&old_ep);
        }

        newesize = (slapi_entry_size(ep->ep_entry) + sizeof(struct backentry));
        if (bdb_import_fifo_validate_capacity_or_expand(job, newesize) == 1) {
            import_log_notice(job, SLAPI_LOG_NOTICE, "bdb_upgradedn_producer", "Skipping entry \"%s\"",
                              slapi_entry_get_dn(e));
            import_log_notice(job, SLAPI_LOG_NOTICE, "bdb_upgradedn_producer",
                              "REASON: entry too large (%lu bytes) for "
                              "the buffer size (%lu bytes), and we were UNABLE to expand buffer.",
                              (long unsigned int)newesize, (long unsigned int)job->fifo.bsize);
            backentry_free(&ep);
            job->skipped++;
            continue;
        }
        /* Now check if fifo has enough space for the new entry */
        if ((job->fifo.c_bsize + newesize) > job->fifo.bsize) {
            bdb_import_wait_for_space_in_fifo(job, newesize);
        }

        /* We have enough space */
        job->fifo.item[idx].filename = ID2ENTRY LDBM_FILENAME_SUFFIX;
        job->fifo.item[idx].line = curr_entry;
        job->fifo.item[idx].entry = ep;
        job->fifo.item[idx].bad = 0;
        job->fifo.item[idx].esize = newesize;

        /* Add the entry size to total fifo size */
        job->fifo.c_bsize += ep->ep_entry ? job->fifo.item[idx].esize : 0;

        /* Update the job to show our progress */
        job->lead_ID = id;
        if ((id - info->first_ID) <= job->fifo.size) {
            job->trailing_ID = info->first_ID;
        } else {
            job->trailing_ID = id - job->fifo.size;
        }

        /* Update our progress meter too */
        info->last_ID_processed = id;
        id++;
        if (job->flags & FLAG_ABORT)
            goto error;
        if (info->command == STOP) {
            finished = 1;
        }
    }
bail:
    dbc->c_close(dbc);
    bdb_release_aux_id2entry(be, db, env);
    info->state = FINISHED | info_state;
    goto done;

error:
    if (dbc) {
        dbc->c_close(dbc);
    }
    bdb_release_aux_id2entry(be, db, env);
    info->state = ABORTED;

done:
    bdb_free_IDarray(&dn_norm_sp_conflicts);
    slapi_ch_free_string(&ecopy);
    slapi_ch_free(&(data.data));
    slapi_ch_free_string(&rdn);
    if (job->upgradefd) {
        fclose(job->upgradefd);
    }
}

static void
bdb_import_wait_for_space_in_fifo(ImportJob *job, size_t new_esize)
{
    struct backentry *temp_ep = NULL;
    size_t i;
    int slot_found;
    PRIntervalTime sleeptime;

    sleeptime = PR_MillisecondsToInterval(import_sleep_time);

    /* Now check if fifo has enough space for the new entry */
    while ((job->fifo.c_bsize + new_esize) > job->fifo.bsize && !(job->flags & FLAG_ABORT)) {
        for (i = 0, slot_found = 0; i < job->fifo.size; i++) {
            temp_ep = job->fifo.item[i].entry;
            if (temp_ep) {
                if (temp_ep->ep_refcnt == 0 && temp_ep->ep_id <= job->ready_EID) {
                    job->fifo.item[i].entry = NULL;
                    if (job->fifo.c_bsize > job->fifo.item[i].esize) {
                        job->fifo.c_bsize -= job->fifo.item[i].esize;
                    } else {
                        job->fifo.c_bsize = 0;
                    }
                    backentry_free(&temp_ep);
                    slot_found = 1;
                }
            }
        }
        if (slot_found == 0)
            DS_Sleep(sleeptime);
    }
}

/* helper function for the foreman: */
static int
bdb_foreman_do_parentid(ImportJob *job, FifoItem *fi, struct attrinfo *parentid_ai)
{
    backend *be = job->inst->inst_be;
    Slapi_Value **svals = NULL;
    Slapi_Attr *attr = NULL;
    int idl_disposition = 0;
    int ret = 0;
    struct backentry *entry = fi->entry;

    if (job->flags & (FLAG_UPGRADEDNFORMAT | FLAG_UPGRADEDNFORMAT_V1)) {
        /* Get the parentid attribute value from deleted attr list */
        Slapi_Value *value = NULL;
        Slapi_Attr *pid_to_del =
            attrlist_remove(&entry->ep_entry->e_aux_attrs, "parentid");
        if (pid_to_del) {
            /* Delete it. */
            ret = slapi_attr_first_value(pid_to_del, &value);
            if (ret < 0) {
                import_log_notice(job, SLAPI_LOG_ERR, "bdb_foreman_do_parentid",
                                  "Error: retrieving parentid value (error %d)",
                                  ret);
            } else {
                const struct berval *bval =
                    slapi_value_get_berval((const Slapi_Value *)value);
                ret = index_addordel_string(be, "parentid",
                                            bval->bv_val, entry->ep_id,
                                            BE_INDEX_DEL | BE_INDEX_EQUALITY | BE_INDEX_NORMALIZED,
                                            NULL);
                if (ret) {
                    import_log_notice(job, SLAPI_LOG_ERR, "bdb_foreman_do_parentid",
                                      "Error: deleting %s from  parentid index "
                                      "(error %d: %s)",
                                      bval->bv_val, ret, dblayer_strerror(ret));
                    return ret;
                }
            }
            slapi_attr_free(&pid_to_del);
        }
    }

    if (slapi_entry_attr_find(entry->ep_entry, LDBM_PARENTID_STR, &attr) == 0) {
        svals = attr_get_present_values(attr);
        ret = index_addordel_values_ext_sv(be, LDBM_PARENTID_STR, svals, NULL,
                                           entry->ep_id, BE_INDEX_ADD,
                                           NULL, &idl_disposition, NULL);
        if (ret != 0) {
            import_log_notice(job, SLAPI_LOG_ERR, "bdb_foreman_do_parentid",
                              "Can't update parentid index (error %d)", ret);
            return ret;
        }
    }

    return 0;
}

/* helper function for the foreman: */
static int
bdb_foreman_do_entryrdn(ImportJob *job, FifoItem *fi)
{
    backend *be = job->inst->inst_be;
    int ret = 0;
    struct backentry *entry = fi->entry;

    if (job->flags & (FLAG_UPGRADEDNFORMAT | FLAG_UPGRADEDNFORMAT_V1)) {
        /* Get the entrydn attribute value from deleted attr list */
        Slapi_Value *value = NULL;
        Slapi_Attr *entryrdn_to_del = NULL;
        entryrdn_to_del = attrlist_remove(&entry->ep_entry->e_aux_attrs,
                                          LDBM_ENTRYRDN_STR);
        if (entryrdn_to_del) {
            /* Delete it. */
            ret = slapi_attr_first_value(entryrdn_to_del, &value);
            if (ret < 0) {
                import_log_notice(job, SLAPI_LOG_ERR, "bdb_foreman_do_entryrdn",
                                  "Error: retrieving entryrdn value (error %d)",
                                  ret);
            } else {
                const struct berval *bval =
                    slapi_value_get_berval((const Slapi_Value *)value);
                ret = entryrdn_index_entry(be, entry, BE_INDEX_DEL, NULL);
                if (ret) {
                    import_log_notice(job, SLAPI_LOG_ERR, "bdb_foreman_do_entryrdn",
                                      "Error: deleting %s from  entrydn index "
                                      "(error %d: %s)",
                                      bval->bv_val, ret, dblayer_strerror(ret));
                    return ret;
                }
            }
            slapi_attr_free(&entryrdn_to_del);
            /* Waited to update e_srdn to delete the old entryrdn.
             * Now updated it to adjust to the new s_dn. */
            slapi_rdn_set_all_dn(&(entry->ep_entry->e_srdn),
                                 slapi_entry_get_dn_const(entry->ep_entry));
        }
    }
    ret = entryrdn_index_entry(be, entry, BE_INDEX_ADD, NULL);
    if (LDBM_ERROR_FOUND_DUPDN == ret) {
        import_log_notice(job, SLAPI_LOG_ERR, "bdb_foreman_do_entryrdn",
                          "Duplicated DN detected: \"%s\": Entry ID: (%d)",
                          slapi_entry_get_dn(entry->ep_entry), entry->ep_id);
        return ret;
    } else if (0 != ret) {
        import_log_notice(job, SLAPI_LOG_ERR, "bdb_foreman_do_entryrdn",
                          "Error writing entryrdn index (error %d: %s)",
                          ret, dblayer_strerror(ret));
        return ret;
    }
    return 0;
}

/* foreman thread:
 * i go through the FIFO just like the other worker threads, but i'm
 * responsible for the interrelated indexes: entrydn, entryrdn, id2entry,
 * and the operational attributes (plus the parentid index).
 */
void
bdb_import_foreman(void *param)
{
    ImportWorkerInfo *info = (ImportWorkerInfo *)param;
    ImportJob *job = info->job;
    ldbm_instance *inst = job->inst;
    backend *be = inst->inst_be;
    PRIntervalTime sleeptime;
    int finished = 0;
    ID id = info->first_ID;
    int ret = 0;
    struct attrinfo *parentid_ai;
    Slapi_PBlock *pb = slapi_pblock_new();

    PR_ASSERT(info != NULL);
    PR_ASSERT(inst != NULL);

    if (job->flags & FLAG_ABORT) {
        goto error;
    }

    /* the pblock is used only by bdb_add_op_attrs */
    slapi_pblock_set(pb, SLAPI_BACKEND, be);
    sleeptime = PR_MillisecondsToInterval(import_sleep_time);
    info->state = RUNNING;

    ainfo_get(be, LDBM_PARENTID_STR, &parentid_ai);

    while (!finished) {
        FifoItem *fi = NULL;
        int parent_status = 0;

        if (job->flags & FLAG_ABORT) {
            goto error;
        }

        while (((info->command == PAUSE) || (id > job->lead_ID)) &&
               (info->command != STOP) && (info->command != ABORT) &&
               !(job->flags & FLAG_ABORT)) {
            /* Check to see if we've been told to stop */
            info->state = WAITING;
            DS_Sleep(sleeptime);
        }
        if (info->command == STOP) {
            finished = 1;
            continue;
        }
        if (job->flags & FLAG_ABORT) {
            goto error;
        }

        info->state = RUNNING;

        /* Read that entry from the cache */
        fi = bdb_import_fifo_fetch(job, id, 0);
        if (NULL == fi) {
            import_log_notice(job, SLAPI_LOG_WARNING, "bdb_import_foreman",
                              "Entry id %d is missing", id);
            continue;
        }
        if (NULL == fi->entry) {
            import_log_notice(job, SLAPI_LOG_WARNING, "bdb_import_foreman",
                              "Entry for id %d is missing", id);
            continue;
        }
        if (job->flags & FLAG_UPGRADEDNFORMAT_V1) {
            /* insert into the entryrdn index */
            (void) bdb_foreman_do_entryrdn(job, fi);
            goto next;
        }
        /* first, fill in any operational attributes */
        /* bdb_add_op_attrs wants a pblock for some reason. */
        if (job->flags & FLAG_UPGRADEDNFORMAT) {
            /* Upgrade dn format may alter the DIT structure. */
            /* It requires a special treatment for that. */
            parent_status = IMPORT_ADD_OP_ATTRS_SAVE_OLD_PID;
        }
        if (bdb_add_op_attrs(pb, inst->inst_li, fi->entry, &parent_status) != 0) {
            import_log_notice(job, SLAPI_LOG_ERR, "bdb_import_foreman",
                              "Could not add op attrs to entry ending at line %d of file \"%s\"",
                              fi->line, fi->filename);
            goto error;
        }

        /*
         * Only check for a parent and add to the entry2dn index
         */
        if (job->flags & FLAG_ABORT) {
            goto error;
        }

        if (parent_status == IMPORT_ADD_OP_ATTRS_NO_PARENT) {
            /* If this entry is a suffix entry, this is not a problem */
            /* However, if it is not, this is an error---it means that
             * someone tried to import an entry before importing its parent
             * we reject the entry but carry on since we've not stored
             * anything related to this entry.
             */
#define RUVRDN SLAPI_ATTR_UNIQUEID "=" RUV_STORAGE_ENTRY_UNIQUEID
            if (!slapi_be_issuffix(inst->inst_be, backentry_get_sdn(fi->entry)) &&
                strcasecmp(slapi_entry_get_nrdn_const(fi->entry->ep_entry), RUVRDN) /* NOT nsuniqueid=ffffffff-... */) {
                import_log_notice(job, SLAPI_LOG_WARNING, "bdb_import_foreman",
                                  "Skipping entry \"%s\" which has no parent, ending at line %d "
                                  "of file \"%s\"",
                                  slapi_entry_get_dn(fi->entry->ep_entry), fi->line, fi->filename);
                /* skip this one */
                fi->bad = FIFOITEM_BAD;
                job->skipped++;
                goto cont; /* below */
            }
        }
        if (job->flags & FLAG_ABORT) {
            goto error;
        }

        /* insert into the entryrdn index */
        ret = bdb_foreman_do_entryrdn(job, fi);

        if ((job->flags & FLAG_UPGRADEDNFORMAT) && (LDBM_ERROR_FOUND_DUPDN == ret)) {
            /*
             * Duplicated DN is detected.
             *
             * Rename <DN> to nsuniqueid=<uuid>+<DN>
             * E.g., uid=tuser,dc=example,dc=com ==>
             * nsuniqueid=<uuid>+uid=tuser,dc=example,dc=com
             *
             * Note: FLAG_UPGRADEDNFORMAT only.
             */
            Slapi_Attr *orig_entrydn = NULL;
            Slapi_Attr *new_entrydn = NULL;
            Slapi_Attr *nsuniqueid = NULL;
            const char *uuidstr = NULL;
            char *new_dn = NULL;
            char *orig_dn =
                slapi_ch_strdup(slapi_entry_get_dn(fi->entry->ep_entry));
            nsuniqueid = attrlist_find(fi->entry->ep_entry->e_attrs,
                                       "nsuniqueid");
            if (nsuniqueid) {
                Slapi_Value *uival = NULL;
                slapi_attr_first_value(nsuniqueid, &uival);
                uuidstr = slapi_value_get_string(uival);
            } else {
                import_log_notice(job, SLAPI_LOG_ERR, "bdb_import_foreman",
                                  "Failed to get nsUniqueId of the duplicated entry %s; "
                                  "Entry ID: %d",
                                  orig_dn, fi->entry->ep_id);
                slapi_ch_free_string(&orig_dn);
                goto cont;
            }
            new_entrydn = slapi_attr_new();
            new_dn = slapi_create_dn_string("nsuniqueid=%s+%s",
                                            uuidstr, orig_dn);
            /* releasing original dn */
            slapi_sdn_done(&fi->entry->ep_entry->e_sdn);
            /* setting new dn; pass in */
            slapi_sdn_init_dn_passin(&fi->entry->ep_entry->e_sdn, new_dn);

            /* Replacing entrydn attribute value */
            orig_entrydn = attrlist_remove(&fi->entry->ep_entry->e_attrs,
                                           "entrydn");
            /* released in forman_do_entrydn */
            attrlist_add(&fi->entry->ep_entry->e_aux_attrs, orig_entrydn);

            /* Setting new entrydn attribute value */
            slapi_attr_init(new_entrydn, "entrydn");
            valueset_add_string(new_entrydn, &new_entrydn->a_present_values,
                                /* new_dn: duped in valueset_add_string */
                                (const char *)new_dn,
                                CSN_TYPE_UNKNOWN, NULL);
            attrlist_add(&fi->entry->ep_entry->e_attrs, new_entrydn);

            /* Try foreman_do_entryrdn, again. */
            ret = bdb_foreman_do_entryrdn(job, fi);

            if (ret) {
                import_log_notice(job, SLAPI_LOG_ERR, "bdb_import_foreman",
                                  "Failed to rename duplicated DN %s to %s; Entry ID: %d",
                                  orig_dn, new_dn, fi->entry->ep_id);
                slapi_ch_free_string(&orig_dn);
                if (-1 == ret) {
                    goto cont; /* skip entry */
                } else {
                    goto error;
                }
            } else {
                import_log_notice(job, SLAPI_LOG_WARNING, "bdb_import_foreman",
                                  "Duplicated entry %s is renamed to %s; Entry ID: %d",
                                  orig_dn, new_dn, fi->entry->ep_id);
                slapi_ch_free_string(&orig_dn);
            }
        } else if (0 != ret) {
            goto error;
        }

        if (job->flags & FLAG_ABORT) {
            goto error;
        }
    next:
        if (!(job->flags & FLAG_REINDEXING)) /* reindex reads data from id2entry */
        {
            /* insert into the id2entry index
             * (that isn't really an index -- it's the storehouse of the entries
             * themselves.)
             */
            /* id2entry_add_ext replaces an entry if it already exists.
             * therefore, the Entry ID stays the same.
             */
            ret = id2entry_add_ext(be, fi->entry, NULL, job->encrypt, NULL);
            if (ret) {
                /* DB_RUNRECOVERY usually occurs if disk fills */
                if (LDBM_OS_ERR_IS_DISKFULL(ret)) {
                    import_log_notice(job, SLAPI_LOG_ERR, "bdb_import_foreman",
                                      "OUT OF SPACE ON DISK or FILE TOO LARGE -- "
                                      "Could not store the entry ending at line %d of file \"%s\"",
                                      fi->line, fi->filename);
                } else if (ret == DB_RUNRECOVERY) {
                    import_log_notice(job, SLAPI_LOG_ERR, "bdb_import_foreman",
                                      "(LARGEFILE SUPPORT NOT ENABLED? OUT OF SPACE ON DISK?) -- "
                                      "Could not store the entry ending at line %d of file \"%s\"",
                                      fi->line, fi->filename);
                } else {
                    import_log_notice(job, SLAPI_LOG_ERR, "bdb_import_foreman",
                                      "Could not store the entry ending at line %d of file \"%s\" -- error %d",
                                      fi->line, fi->filename, ret);
                }
                goto error;
            }
        }

        if (job->flags & FLAG_ABORT) {
            goto error;
        }

        if (!slapi_entry_flag_is_set(fi->entry->ep_entry, SLAPI_ENTRY_FLAG_TOMBSTONE)) {
            /* parentid index
             * (we have to do this here, because the parentID is dependent on
             * looking up by entryrdn.)
             * Only add to the parent index if the entry is not a tombstone
             */
            ret = bdb_foreman_do_parentid(job, fi, parentid_ai);
            if (ret != 0)
                goto error;
        }

        if (!job->all_vlv_init &&
            !slapi_entry_flag_is_set(fi->entry->ep_entry,
                                     SLAPI_ENTRY_FLAG_TOMBSTONE)) {
            /* Lastly, before we're finished with the entry, pass it to the
               vlv code to see whether it's within the scope a VLV index. */
            vlv_grok_new_import_entry(fi->entry, be, &job->all_vlv_init);
        }
        if (job->flags & FLAG_ABORT) {
            goto error;
        }


        /* Remove the entry from the cache (Put in the cache in id2entry_add) */
        if (!(job->flags & FLAG_REINDEXING)) {
            /* reindex reads data from id2entry */
            CACHE_REMOVE(&inst->inst_cache, fi->entry);
        }
        fi->entry->ep_refcnt = job->number_indexers;

    cont:
        if (job->flags & FLAG_ABORT) {
            goto error;
        }

        job->ready_ID = id;
        job->ready_EID = fi->entry->ep_id;
        info->last_ID_processed = id;
        id++;

        if (job->flags & FLAG_ABORT) {
            goto error;
        }

        /* capture skipped entry warnings for this task */
        if(job->skipped) {
            slapi_task_set_warning(job->task, WARN_SKIPPED_IMPORT_ENTRY);
        }
    }


    slapi_pblock_destroy(pb);
    info->state = FINISHED;
    return;

error:
    slapi_pblock_destroy(pb);
    info->state = ABORTED;
}


/* worker thread:
 * given an attribute, this worker plows through the entry FIFO, building
 * up the attribute index.
 */
void
bdb_import_worker(void *param)
{
    ImportWorkerInfo *info = (ImportWorkerInfo *)param;
    ImportJob *job = info->job;
    ldbm_instance *inst = job->inst;
    backend *be = inst->inst_be;
    PRIntervalTime sleeptime;
    int finished = 0;
    ID id = info->first_ID;
    int ret = 0;
    int idl_disposition = 0;
    struct vlvIndex *vlv_index = NULL;
    void *substring_key_buffer = NULL;
    FifoItem *fi = NULL;
    int is_objectclass_attribute;
    int is_nsuniqueid_attribute;
    int is_nscpentrydn_attribute;
    int is_nstombstonecsn_attribute;
    void *attrlist_cursor;

    PR_ASSERT(NULL != info);
    PR_ASSERT(NULL != inst);

    if (job->flags & FLAG_ABORT) {
        goto error;
    }

    if (INDEX_VLV == info->index_info->ai->ai_indexmask) {
        vlv_index = vlv_find_indexname(info->index_info->name, be);
        if (NULL == vlv_index) {
            goto error;
        }
    }

    /*
     * If the entry is a Tombstone, then we only add it to the nsuniqeid index,
     * the nscpEntryDN index, and the idlist for (objectclass=tombstone). These
     * flags are just handy for working out what to do in this case.
     */
    is_objectclass_attribute =
        (strcasecmp(info->index_info->name, "objectclass") == 0);
    is_nsuniqueid_attribute =
        (strcasecmp(info->index_info->name, SLAPI_ATTR_UNIQUEID) == 0);
    is_nscpentrydn_attribute =
        (strcasecmp(info->index_info->name, SLAPI_ATTR_NSCP_ENTRYDN) == 0);
    is_nstombstonecsn_attribute =
        (strcasecmp(info->index_info->name, SLAPI_ATTR_TOMBSTONE_CSN) == 0);

    if (1 != idl_get_idl_new()) {
        /* Is there substring indexing going on here ? */
        if ((INDEX_SUB & info->index_info->ai->ai_indexmask) &&
            (info->index_buffer_size > 0)) {
            /* Then make a key buffer thing */
            ret = index_buffer_init(info->index_buffer_size, 0,
                                    &substring_key_buffer);
            if (0 != ret) {
                import_log_notice(job, SLAPI_LOG_ERR, "bdb_import_worker",
                                  "IMPORT FAIL 1 (error %d)", ret);
            }
        }
    }

    sleeptime = PR_MillisecondsToInterval(import_sleep_time);
    info->state = RUNNING;
    info->last_ID_processed = id - 1;

    while (!finished) {
        struct backentry *ep = NULL;
        Slapi_Value **svals = NULL;
        Slapi_Attr *attr = NULL;

        if (job->flags & FLAG_ABORT) {
            goto error;
        }

        /* entry can be NULL if it turned out to be bogus */
        while (!finished && !ep) {
            /* This worker thread must wait if the command flag is "PAUSE" or
                 * the entry corresponds to the current entry treated by the foreman
                 * thread, and the state is neither STOP nor ABORT
                 */
            while (((info->command == PAUSE) || (id > job->ready_ID)) &&
                   (info->command != STOP) && (info->command != ABORT) &&
                   !(job->flags & FLAG_ABORT)) {
                /* Check to see if we've been told to stop */
                info->state = WAITING;
                DS_Sleep(sleeptime);
            }

            if (info->command == STOP) {
                finished = 1;
                continue;
            }
            if (job->flags & FLAG_ABORT) {
                goto error;
            }

            info->state = RUNNING;

            /* Read that entry from the cache */
            fi = bdb_import_fifo_fetch(job, id, 1);
            ep = fi ? fi->entry : NULL;
            if (!ep) {
                /* skipping an entry that turned out to be bad */
                info->last_ID_processed = id;
                id++;
            }
        }
        if (finished)
            continue;
        /* Although following test is always false (the while loop implies
         *  that !(!finished && !ep) i.e finished || ep and the previous if
         *  means that we are in !finished case so we are in ep!=NULL case)
         *  it prevent static analyzer to log some false positive warning
         */
        if (!ep)
            continue;

        if (!slapi_entry_flag_is_set(ep->ep_entry,
                                     SLAPI_ENTRY_FLAG_TOMBSTONE)) {
            /* This is not a tombstone entry. */
            /* Is this a VLV index ? */

            if (job->flags & FLAG_ABORT) {
                goto error;
            }

            if (INDEX_VLV == info->index_info->ai->ai_indexmask) {
                /* Yes, call VLV code -- needs pblock to find backend */
                Slapi_PBlock *pb = slapi_pblock_new();

                PR_ASSERT(NULL != vlv_index);
                slapi_pblock_set(pb, SLAPI_BACKEND, be);
                vlv_update_index(vlv_index, NULL, inst->inst_li, pb, NULL, ep);
                slapi_pblock_destroy(pb);
            } else {
                /* No, process regular index */
                if (job->flags & (FLAG_UPGRADEDNFORMAT | FLAG_UPGRADEDNFORMAT_V1)) {
                    /* Get the attribute value from deleted attr list */
                    Slapi_Value *value = NULL;
                    const struct berval *bval = NULL;
                    Slapi_Attr *key_to_del =
                        attrlist_remove(&ep->ep_entry->e_aux_attrs,
                                        info->index_info->name);

                    if (key_to_del) {
                        int idx = 0;
                        /* Delete it. */
                        for (idx = slapi_attr_first_value(key_to_del, &value);
                             idx >= 0;
                             idx = slapi_attr_next_value(key_to_del, idx,
                                                         &value)) {
                            bval =
                                slapi_value_get_berval((const Slapi_Value *)value);
                            ret = index_addordel_string(be,
                                                        info->index_info->name,
                                                        bval->bv_val,
                                                        ep->ep_id,
                                                        BE_INDEX_DEL | BE_INDEX_EQUALITY |
                                                            BE_INDEX_NORMALIZED,
                                                        NULL);
                            if (ret) {
                                import_log_notice(job, SLAPI_LOG_ERR, "bdb_import_worker",
                                                  "Error deleting %s from %s index "
                                                  "(error %d: %s)",
                                                  bval->bv_val, info->index_info->name,
                                                  ret, dblayer_strerror(ret));
                                goto error;
                            }
                        }
                        slapi_attr_free(&key_to_del);
                    }
                }

                /* Look for the attribute we're indexing and its subtypes */
                /* For each attr write to the index */
                attrlist_cursor = NULL;
                while ((attr = attrlist_find_ex(ep->ep_entry->e_attrs,
                                                info->index_info->name,
                                                NULL,
                                                NULL,
                                                &attrlist_cursor)) != NULL) {

                    if (job->flags & FLAG_ABORT) {
                        goto error;
                    }
                    if (valueset_isempty(&(attr->a_present_values)))
                        continue;
                    svals = attr_get_present_values(attr);
                    ret = index_addordel_values_ext_sv(be, info->index_info->name,
                                                       svals, NULL, ep->ep_id, BE_INDEX_ADD | (job->encrypt ? 0 : BE_INDEX_DONT_ENCRYPT), NULL, &idl_disposition,
                                                       substring_key_buffer);

                    if (0 != ret) {
                        /* Something went wrong, eg disk filled up */
                        goto error;
                    }
                }
            }
        } else {
            /* This is a Tombstone entry... we only add it to the nsuniqueid
             * index, the nscpEntryDN index,  and the idlist for (objectclass=nstombstone).
             */
            if (job->flags & FLAG_ABORT) {
                goto error;
            }
            if (is_nsuniqueid_attribute) {
                ret = index_addordel_string(be, SLAPI_ATTR_UNIQUEID,
                                            slapi_entry_get_uniqueid(ep->ep_entry), ep->ep_id,
                                            BE_INDEX_ADD, NULL);
                if (0 != ret) {
                    /* Something went wrong, eg disk filled up */
                    goto error;
                }
            }
            if (is_objectclass_attribute) {
                ret = index_addordel_string(be, SLAPI_ATTR_OBJECTCLASS,
                                            SLAPI_ATTR_VALUE_TOMBSTONE, ep->ep_id, BE_INDEX_ADD, NULL);
                if (0 != ret) {
                    /* Something went wrong, eg disk filled up */
                    goto error;
                }
            }
            if (is_nscpentrydn_attribute) {
                attrlist_cursor = NULL;
                while ((attr = attrlist_find_ex(ep->ep_entry->e_attrs,
                                                SLAPI_ATTR_NSCP_ENTRYDN,
                                                NULL,
                                                NULL,
                                                &attrlist_cursor)) != NULL) {

                    if (job->flags & FLAG_ABORT) {
                        goto error;
                    }
                    if (valueset_isempty(&(attr->a_present_values)))
                        continue;
                    svals = attr_get_present_values(attr);
                    ret = index_addordel_values_ext_sv(be, info->index_info->name,
                                                       svals, NULL, ep->ep_id, BE_INDEX_ADD | (job->encrypt ? 0 : BE_INDEX_DONT_ENCRYPT), NULL, &idl_disposition,
                                                       substring_key_buffer);

                    if (0 != ret) {
                        /* Something went wrong, eg disk filled up */
                        goto error;
                    }
                }
            }
            if (is_nstombstonecsn_attribute) {
                const CSN *tomb_csn = entry_get_deletion_csn(ep->ep_entry);
                char tomb_csnstr[CSN_STRSIZE];

                if (tomb_csn) {
                    csn_as_string(tomb_csn, PR_FALSE, tomb_csnstr);
                    ret = index_addordel_string(be, SLAPI_ATTR_TOMBSTONE_CSN,
                                                tomb_csnstr, ep->ep_id, BE_INDEX_ADD, NULL);
                    if (0 != ret) {
                        /* Something went wrong, eg disk filled up */
                        goto error;
                    }
                }
            }
        }
        bdb_import_decref_entry(ep);
        info->last_ID_processed = id;
        id++;

        if (job->flags & FLAG_ABORT) {
            goto error;
        }
    }

    if (job->flags & FLAG_ABORT) {
        goto error;
    }


    /* If we were buffering index keys, now flush them */
    if (substring_key_buffer) {
        ret = index_buffer_flush(substring_key_buffer,
                                 inst->inst_be, NULL,
                                 info->index_info->ai);
        if (0 != ret) {
            goto error;
        }
    }
    info->state = FINISHED;
    goto done;

error:
    if (ret == DB_RUNRECOVERY) {
        slapi_log_err(SLAPI_LOG_CRIT, "bdb_import_worker",
                      "Cannot import; database recovery needed\n");
    } else if (ret == DB_LOCK_DEADLOCK) {
        /* can this occur? */
    }

    info->state = ABORTED;

done:
    if (substring_key_buffer) {
        index_buffer_terminate(be, substring_key_buffer);
    }
}


/*
 * import entries to a backend, over the wire -- entries will arrive
 * asynchronously, so this method has no "producer" thread.  instead, the
 * front-end drops new entries in as they arrive.
 *
 * this is sometimes called "fast replica initialization".
 *
 * some of this code is duplicated from ldif2ldbm, but i don't think we
 * can avoid it.
 */
static int
bdb_bulk_import_start(Slapi_PBlock *pb)
{
    struct ldbminfo *li = NULL;
    ImportJob *job = NULL;
    backend *be = NULL;
    PRThread *thread = NULL;
    int ret = 0;

    slapi_pblock_get(pb, SLAPI_BACKEND, &be);
    if (be == NULL) {
        slapi_log_err(SLAPI_LOG_ERR, "bdb_bulk_import_start", "Backend is not set\n");
        return -1;
    }
    job = CALLOC(ImportJob);
    slapi_pblock_get(pb, SLAPI_LDIF2DB_ENCRYPT, &job->encrypt);
    li = (struct ldbminfo *)(be->be_database->plg_private);
    job->inst = (ldbm_instance *)be->be_instance_info;

    /* check if an import/restore is already ongoing... */
    PR_Lock(job->inst->inst_config_mutex);
    if (job->inst->inst_flags & INST_FLAG_BUSY) {
        PR_Unlock(job->inst->inst_config_mutex);
        slapi_log_err(SLAPI_LOG_WARNING, "bdb_bulk_import_start",
                      "'%s' is already in the middle of another task and cannot be disturbed.\n",
                      job->inst->inst_name);
        FREE(job);
        return SLAPI_BI_ERR_BUSY;
    }
    job->inst->inst_flags |= INST_FLAG_BUSY;
    PR_Unlock(job->inst->inst_config_mutex);

    /* take backend offline */
    slapi_mtn_be_disable(be);

    /* get uniqueid info */
    slapi_pblock_get(pb, SLAPI_LDIF2DB_GENERATE_UNIQUEID, &job->uuid_gen_type);
    if (job->uuid_gen_type == SLAPI_UNIQUEID_GENERATE_NAME_BASED) {
        char *namespaceid;

        slapi_pblock_get(pb, SLAPI_LDIF2DB_NAMESPACEID, &namespaceid);
        job->uuid_namespace = slapi_ch_strdup(namespaceid);
    }

    job->flags = 0; /* don't use files */
    job->flags |= FLAG_INDEX_ATTRS;
    job->flags |= FLAG_ONLINE;
    job->starting_ID = 1;
    job->first_ID = 1;

    /* how much space should we allocate to index buffering? */
    job->job_index_buffer_size = bdb_import_get_index_buffer_size();
    if (job->job_index_buffer_size == 0) {
        /* 10% of the allocated cache size + one meg */
        job->job_index_buffer_size = (job->inst->inst_li->li_dbcachesize / 10) +
                                     (1024 * 1024);
    }

    pthread_mutex_init(&job->wire_lock, NULL);
    pthread_cond_init(&job->wire_cv, NULL);

    /* COPIED from ldif2ldbm.c : */

    /* shutdown this instance of the db */
    cache_clear(&job->inst->inst_cache, CACHE_TYPE_ENTRY);
    cache_clear(&job->inst->inst_dncache, CACHE_TYPE_DN);
    dblayer_instance_close(be);

    /* Delete old database files */
    bdb_delete_instance_dir(be);
    /* it's okay to fail -- it might already be gone */

    /* bdb_instance_start will init the id2entry index. */
    /* it also (finally) fills in inst_dir_name */
    ret = bdb_instance_start(be, DBLAYER_IMPORT_MODE);
    if (ret != 0)
        goto fail;

    /* END OF COPIED SECTION */

    pthread_mutex_lock(&job->wire_lock);
    vlv_init(job->inst);

    /* create thread for bdb_import_main, so we can return */
    thread = PR_CreateThread(PR_USER_THREAD, bdb_import_main, (void *)job,
                             PR_PRIORITY_NORMAL, PR_GLOBAL_THREAD,
                             PR_JOINABLE_THREAD,
                             SLAPD_DEFAULT_THREAD_STACKSIZE);
    if (thread == NULL) {
        PRErrorCode prerr = PR_GetError();
        slapi_log_err(SLAPI_LOG_ERR, "bdb_bulk_import_start",
                      "Unable to spawn import thread, " SLAPI_COMPONENT_NAME_NSPR " error %d (%s)\n",
                      prerr, slapd_pr_strerror(prerr));
        pthread_mutex_unlock(&job->wire_lock);
        ret = -2;
        goto fail;
    }

    job->main_thread = thread;

    Connection *pb_conn;
    slapi_pblock_get(pb, SLAPI_CONNECTION, &pb_conn);

    slapi_set_object_extension(li->li_bulk_import_object, pb_conn, li->li_bulk_import_handle, job);

    /* wait for the bdb_import_main to signal that it's ready for entries */
    /* (don't want to send the success code back to the LDAP client until
     * we're ready for the adds to start rolling in)
     */
    pthread_cond_wait(&job->wire_cv, &job->wire_lock);
    pthread_mutex_unlock(&job->wire_lock);

    return 0;

fail:
    PR_Lock(job->inst->inst_config_mutex);
    job->inst->inst_flags &= ~INST_FLAG_BUSY;
    PR_Unlock(job->inst->inst_config_mutex);
    bdb_import_free_job(job);
    FREE(job);
    return ret;
}

/* returns 0 on success, or < 0 on error
 *
 * on error, the import process is aborted -- so if this returns an error,
 * don't try to queue any more entries or you'll be sorry.  The caller
 * is also responsible for free'ing the passed in entry on error.  The
 * entry will be consumed on success.
 */
static int
bdb_bulk_import_queue(ImportJob *job, Slapi_Entry *entry)
{
    struct backentry *ep = NULL, *old_ep = NULL;
    int idx;
    ID id = 0;
    Slapi_Attr *attr = NULL;
    size_t newesize = 0;

    if (!entry) {
        return -1;
    }

    /* The import is aborted, just ignore that entry */
    if (job->flags & FLAG_ABORT) {
        return -1;
    }

    pthread_mutex_lock(&job->wire_lock);
    /* Let's do this inside the lock !*/
    id = job->lead_ID + 1;
    /* generate uniqueid if necessary */
    if (bdb_import_generate_uniqueid(job, entry) != UID_SUCCESS) {
        import_abort_all(job, 1);
        pthread_mutex_unlock(&job->wire_lock);
        return -1;
    }

    /* make into backentry */
    ep = bdb_import_make_backentry(entry, id);
    if ((ep == NULL) || (ep->ep_entry == NULL)) {
        import_abort_all(job, 1);
        backentry_free(&ep); /* release the backend wrapper, here */
        pthread_mutex_unlock(&job->wire_lock);
        return -1;
    }

    /* encode the password */
    if (slapi_entry_attr_find(ep->ep_entry, "userpassword", &attr) == 0) {
        Slapi_Value **va = attr_get_present_values(attr);

        pw_encodevals((Slapi_Value **)va); /* jcm - had to cast away const */
    }

    /* if usn_value is available AND the entry does not have it, */
    if (job->usn_value && slapi_entry_attr_find(ep->ep_entry,
                                                SLAPI_ATTR_ENTRYUSN, &attr)) {
        slapi_entry_add_value(ep->ep_entry, SLAPI_ATTR_ENTRYUSN,
                              job->usn_value);
    }

    /* Now we have this new entry, all decoded
     * Next thing we need to do is:
     * (1) see if the appropriate fifo location contains an
     *     entry which had been processed by the indexers.
     *     If so, proceed.
     *     If not, spin waiting for it to become free.
     * (2) free the old entry and store the new one there.
     * (3) Update the job progress indicators so the indexers
     *     can use the new entry.
     */
    idx = id % job->fifo.size;
    old_ep = job->fifo.item[idx].entry;
    if (old_ep) {
        while ((old_ep->ep_refcnt > 0) && !(job->flags & FLAG_ABORT)) {
            DS_Sleep(PR_MillisecondsToInterval(import_sleep_time));
        }

        /* the producer could be running thru the fifo while
         * everyone else is cycling to a new pass...
         * double-check that this entry is < ready_EID
         */
        while ((old_ep->ep_id >= job->ready_EID) && !(job->flags & FLAG_ABORT)) {
            DS_Sleep(PR_MillisecondsToInterval(import_sleep_time));
        }

        if (job->flags & FLAG_ABORT) {
            backentry_clear_entry(ep); /* entry is released in the frontend on failure*/
            backentry_free(&ep);       /* release the backend wrapper, here */
            pthread_mutex_unlock(&job->wire_lock);
            return -2;
        }

        PR_ASSERT(old_ep == job->fifo.item[idx].entry);
        job->fifo.item[idx].entry = NULL;
        if (job->fifo.c_bsize > job->fifo.item[idx].esize)
            job->fifo.c_bsize -= job->fifo.item[idx].esize;
        else
            job->fifo.c_bsize = 0;
        backentry_free(&old_ep);
    }
    /* Is this a tombstone? If so, need a special treatment */
    if (ep->ep_entry->e_flags & SLAPI_ENTRY_FLAG_TOMBSTONE) {
        char *tombstone_rdn =
            slapi_ch_strdup(slapi_entry_get_dn_const(ep->ep_entry));
        if ((0 == PL_strncasecmp(tombstone_rdn, SLAPI_ATTR_UNIQUEID,
                                 sizeof(SLAPI_ATTR_UNIQUEID) - 1)) &&
            /* dn starts with "nsuniqueid=" */
            (NULL == PL_strstr(tombstone_rdn, RUV_STORAGE_ENTRY_UNIQUEID))) {
            /* and this is not an RUV */
            char *sepp = PL_strchr(tombstone_rdn, ',');
            /* dn looks like this:
             * nsuniqueid=042d8081-...-ca8fe9f7,uid=tuser,o=abc.com
             * create a new srdn for the original dn
             * uid=tuser,o=abc.com
             */
            if (sepp) {
                Slapi_RDN mysrdn = {0};
                if (slapi_rdn_init_all_dn(&mysrdn, sepp + 1)) {
                    slapi_log_err(SLAPI_LOG_ERR, "bdb_bulk_import_queue",
                                  "Failed to convert DN %s to RDN\n", sepp + 1);
                    slapi_ch_free_string(&tombstone_rdn);
                    /* entry is released in the frontend on failure*/
                    backentry_clear_entry(ep);
                    backentry_free(&ep); /* release the backend wrapper */
                    pthread_mutex_unlock(&job->wire_lock);
                    return -1;
                }
                sepp = PL_strchr(sepp + 1, ',');
                if (sepp) {
                    Slapi_RDN *srdn = slapi_entry_get_srdn(ep->ep_entry);
                    /* nsuniqueid=042d8081-...-ca8fe9f7,uid=tuser, */
                    /*                                           ^ */
                    *sepp = '\0';
                    slapi_rdn_replace_rdn(&mysrdn, tombstone_rdn);
                    slapi_rdn_done(srdn);
                    slapi_entry_set_srdn(ep->ep_entry, &mysrdn);
                    slapi_rdn_done(&mysrdn);
                }
            }
        }
        slapi_ch_free_string(&tombstone_rdn);
    }

    newesize = (slapi_entry_size(ep->ep_entry) + sizeof(struct backentry));
    if (bdb_import_fifo_validate_capacity_or_expand(job, newesize) == 1) {
        import_log_notice(job, SLAPI_LOG_ERR, "bdb_bulk_import_queue", "Entry too large (%lu bytes) for "
                                                                   "the effective import buffer size (%lu bytes), and we were UNABLE to expand buffer. ",
                          (long unsigned int)newesize, (long unsigned int)job->fifo.bsize);
        backentry_clear_entry(ep); /* entry is released in the frontend on failure*/
        backentry_free(&ep);       /* release the backend wrapper, here */
        pthread_mutex_unlock(&job->wire_lock);
        return -1;
    }
    /* Now check if fifo has enough space for the new entry */
    if ((job->fifo.c_bsize + newesize) > job->fifo.bsize) {
        bdb_import_wait_for_space_in_fifo(job, newesize);
    }

    /* We have enough space */
    job->fifo.item[idx].filename = "(bulk import)";
    job->fifo.item[idx].line = 0;
    job->fifo.item[idx].entry = ep;
    job->fifo.item[idx].bad = 0;
    job->fifo.item[idx].esize = newesize;

    /* Add the entry size to total fifo size */
    job->fifo.c_bsize += ep->ep_entry ? job->fifo.item[idx].esize : 0;

    /* Update the job to show our progress */
    job->lead_ID = id;
    if ((id - job->starting_ID) <= job->fifo.size) {
        job->trailing_ID = job->starting_ID;
    } else {
        job->trailing_ID = id - job->fifo.size;
    }

    pthread_mutex_unlock(&job->wire_lock);
    return 0;
}

/* plugin entry function for replica init
 *
 * For the SLAPI_BI_STATE_ADD state:
 * On success (rc=0), the entry in pb->pb_import_entry will be
 * consumed.  For any other return value, the caller is
 * responsible for freeing the entry in the pb.
 */
int
bdb_ldbm_back_wire_import(Slapi_PBlock *pb)
{
    struct ldbminfo *li;
    backend *be = NULL;
    ImportJob *job = NULL;
    PRThread *thread;
    int state;
    int rc;
    Connection *pb_conn;

    slapi_pblock_get(pb, SLAPI_CONNECTION, &pb_conn);
    slapi_pblock_get(pb, SLAPI_BACKEND, &be);
    if (be == NULL) {
        slapi_log_err(SLAPI_LOG_ERR, "bdb_ldbm_back_wire_import",
                      "Backend is not set\n");
        return -1;
    }
    li = (struct ldbminfo *)(be->be_database->plg_private);
    slapi_pblock_get(pb, SLAPI_BULK_IMPORT_STATE, &state);
    slapi_pblock_set(pb, SLAPI_LDIF2DB_ENCRYPT, &li->li_online_import_encrypt);
    if (state == SLAPI_BI_STATE_START) {
        /* starting a new import */
        rc = bdb_bulk_import_start(pb);
        if (!rc) {
            /* job must be available since bdb_bulk_import_start was successful */
            job = (ImportJob *)slapi_get_object_extension(li->li_bulk_import_object, pb_conn, li->li_bulk_import_handle);
            /* Get entryusn, if needed. */
            _get_import_entryusn(job, &(job->usn_value));
        }
        slapi_log_err(SLAPI_LOG_REPL, "bdb_ldbm_back_wire_import", "bdb_bulk_import_start returned %d\n", rc);
        return rc;
    }

    PR_ASSERT(pb_conn != NULL);
    if (pb_conn != NULL) {
        job = (ImportJob *)slapi_get_object_extension(li->li_bulk_import_object, pb_conn, li->li_bulk_import_handle);
    }

    if ((job == NULL) || (pb_conn == NULL)) {
        /* import might be aborting */
        return -1;
    }

    if (state == SLAPI_BI_STATE_ADD) {
        Slapi_Entry *pb_import_entry = NULL;
        slapi_pblock_get(pb, SLAPI_BULK_IMPORT_ENTRY, &pb_import_entry);
        /* continuing previous import */
        if (!bdb_import_entry_belongs_here(pb_import_entry, job->inst->inst_be)) {
            /* silently skip */
            /* We need to consume pb->pb_import_entry on success, so we free it here. */
            slapi_log_err(SLAPI_LOG_REPL, "bdb_ldbm_back_wire_import", "Skipping entry %s\n",
                          slapi_sdn_get_dn(slapi_entry_get_sdn(pb_import_entry)));
            slapi_entry_free(pb_import_entry);
            return 0;
        }

        rc = bdb_bulk_import_queue(job, pb_import_entry);
        slapi_log_err(SLAPI_LOG_REPL, "bdb_ldbm_back_wire_import", "bdb_bulk_import_queue returned %d with entry %s\n",
                      rc, slapi_sdn_get_dn(slapi_entry_get_sdn(pb_import_entry)));
        return rc;
    }

    thread = job->main_thread;

    if (state == SLAPI_BI_STATE_DONE) {
        slapi_value_free(&(job->usn_value));
        /* finished with an import */
        job->flags |= FLAG_PRODUCER_DONE;
        /* "job" struct may vanish at any moment after we set the DONE
         * flag, so keep a copy of the thread id in 'thread' for safekeeping.
         */
        /* wait for bdb_import_main to finish... */
        PR_JoinThread(thread);
        slapi_set_object_extension(li->li_bulk_import_object, pb_conn, li->li_bulk_import_handle, NULL);
        slapi_log_err(SLAPI_LOG_REPL, "bdb_ldbm_back_wire_import", "Bulk import is finished.\n");
        return 0;
    }

    /* ??? unknown state */
    slapi_log_err(SLAPI_LOG_ERR, "bdb_ldbm_back_wire_import",
                  "ERROR: unknown state %d\n", state);
    return -1;
}

/*
 * backup index configuration
 * this function is called from dblayer_backup (ldbm2archive)
 * [547427] index config must not change between backup and restore
 */
#define DSE_INDEX "dse_index.ldif"
#define DSE_INSTANCE "dse_instance.ldif"
#define DSE_INDEX_FILTER "(objectclass=nsIndex)"
#define DSE_INSTANCE_FILTER "(objectclass=nsBackendInstance)"
static int
bdb_dse_conf_backup_core(struct ldbminfo *li, char *dest_dir, char *file_name, char *filter)
{
    Slapi_PBlock *srch_pb = NULL;
    Slapi_Entry **entries = NULL;
    Slapi_Entry **ep = NULL;
    Slapi_Attr *attr = NULL;
    char *attr_name;
    char *filename = NULL;
    PRFileDesc *prfd = NULL;
    int rval = 0;
    int dlen = 0;
    PRInt32 prrval;
    char tmpbuf[BUFSIZ];
    char *tp = NULL;

    dlen = strlen(dest_dir);
    if (0 == dlen) {
        filename = file_name;
    } else {
        filename = slapi_ch_smprintf("%s/%s", dest_dir, file_name);
    }
    slapi_log_err(SLAPI_LOG_TRACE, "bdb_dse_conf_backup_core",
                  "(%s): backup file %s\n", filter, filename);

    /* Open the file to write */
    if ((prfd = PR_Open(filename, PR_RDWR | PR_CREATE_FILE | PR_TRUNCATE,
                        SLAPD_DEFAULT_FILE_MODE)) == NULL) {
        slapi_log_err(SLAPI_LOG_ERR, "bdb_dse_conf_backup_core",
                      "(%s): open %s failed: (%s)\n",
                      filter, filename, slapd_pr_strerror(PR_GetError()));
        rval = -1;
        goto out;
    }

    srch_pb = slapi_pblock_new();
    if (!srch_pb) {
        slapi_log_err(SLAPI_LOG_ERR, "bdb_dse_conf_backup_core",
                      "(%s): out of memory\n", filter);
        rval = -1;
        goto out;
    }

    slapi_search_internal_set_pb(srch_pb, li->li_plugin->plg_dn,
                                 LDAP_SCOPE_SUBTREE, filter, NULL, 0, NULL, NULL, li->li_identity, 0);
    slapi_search_internal_pb(srch_pb);
    slapi_pblock_get(srch_pb, SLAPI_PLUGIN_INTOP_SEARCH_ENTRIES, &entries);
    for (ep = entries; ep != NULL && *ep != NULL; ep++) {
        int32_t l = strlen(slapi_entry_get_dn_const(*ep)) + 5 /* "dn: \n" */;
        slapi_log_err(SLAPI_LOG_TRACE, "bdb_dse_conf_backup_core",
                      "dn: %s\n", slapi_entry_get_dn_const(*ep));

        if (l <= sizeof(tmpbuf))
            tp = tmpbuf;
        else
            tp = (char *)slapi_ch_malloc(l); /* should be very rare ... */
        sprintf(tp, "dn: %s\n", slapi_entry_get_dn_const(*ep));
        prrval = PR_Write(prfd, tp, l);
        if (prrval != l) {
            slapi_log_err(SLAPI_LOG_ERR, "bdb_dse_conf_backup_core",
                          "(%s): write %" PRId32 " failed: %d (%s)\n",
                          filter, l, PR_GetError(), slapd_pr_strerror(PR_GetError()));
            rval = -1;
            if (l > sizeof(tmpbuf))
                slapi_ch_free_string(&tp);
            goto out;
        }
        if (l > sizeof(tmpbuf))
            slapi_ch_free_string(&tp);

        for (slapi_entry_first_attr(*ep, &attr); attr;
             slapi_entry_next_attr(*ep, attr, &attr)) {
            int i;
            Slapi_Value *sval = NULL;
            const struct berval *attr_val;
            int attr_name_len;

            slapi_attr_get_type(attr, &attr_name);
            /* numsubordinates should not be backed up */
            if (!strcasecmp(LDBM_NUMSUBORDINATES_STR, attr_name))
                continue;
            attr_name_len = strlen(attr_name);
            for (i = slapi_attr_first_value(attr, &sval); i != -1;
                 i = slapi_attr_next_value(attr, i, &sval)) {
                attr_val = slapi_value_get_berval(sval);
                l = strlen(attr_val->bv_val) + attr_name_len + 3; /* : \n" */
                slapi_log_err(SLAPI_LOG_TRACE, "bdb_dse_conf_backup_core",
                              "%s: %s\n", attr_name, attr_val->bv_val);
                if (l <= sizeof(tmpbuf))
                    tp = tmpbuf;
                else
                    tp = (char *)slapi_ch_malloc(l);
                sprintf(tp, "%s: %s\n", attr_name, attr_val->bv_val);
                prrval = PR_Write(prfd, tp, l);
                if (prrval != l) {
                    slapi_log_err(SLAPI_LOG_ERR, "bdb_dse_conf_backup_core",
                                  "(%s): write %" PRId32 " failed: %d (%s)\n",
                                  filter, l, PR_GetError(), slapd_pr_strerror(PR_GetError()));
                    rval = -1;
                    if (l > sizeof(tmpbuf))
                        slapi_ch_free_string(&tp);
                    goto out;
                }
                if (l > sizeof(tmpbuf))
                    slapi_ch_free_string(&tp);
            }
        }
        if (ep != NULL && ep[1] != NULL) {
            prrval = PR_Write(prfd, "\n", 1);
            if (prrval != 1) {
                slapi_log_err(SLAPI_LOG_ERR, "bdb_dse_conf_backup_core",
                              "(%s): write %" PRId32 " failed: %d (%s)\n",
                              filter, l, PR_GetError(), slapd_pr_strerror(PR_GetError()));
                rval = -1;
                goto out;
            }
        }
    }

out:
    if (srch_pb) {
        slapi_free_search_results_internal(srch_pb);
        slapi_pblock_destroy(srch_pb);
    }

    if (0 != dlen) {
        slapi_ch_free_string(&filename);
    }

    if (prfd) {
        prrval = PR_Close(prfd);
        if (PR_SUCCESS != prrval) {
            slapi_log_err(SLAPI_LOG_CRIT, "bdb_dse_conf_backup_core",
                          "Failed to back up dse indexes %d (%s)\n",
                          PR_GetError(), slapd_pr_strerror(PR_GetError()));
            rval = -1;
        }
    }

    return rval;
}

int
bdb_dse_conf_backup(struct ldbminfo *li, char *dest_dir)
{
    int rval = 0;
    rval = bdb_dse_conf_backup_core(li, dest_dir, DSE_INSTANCE, DSE_INSTANCE_FILTER);
    rval |= bdb_dse_conf_backup_core(li, dest_dir, DSE_INDEX, DSE_INDEX_FILTER);
    return rval;
}

/*
 * read the backed up index configuration
 * adjust them if the current configuration is different from it.
 * this function is called from dblayer_restore (archive2ldbm)
 * these functions are placed here to borrow import_get_entry
 * [547427] index config must not change between backup and restore
 */
int
bdb_dse_conf_verify_core(struct ldbminfo *li, char *src_dir, char *file_name, char *filter, char *log_str)
{
    char *filename = NULL;
    int rval = 0;
    ldif_context c;
    int fd = -1;
    int curr_lineno = 0;
    int finished = 0;
    int backup_entry_len = 256;
    char *search_scope = NULL;
    Slapi_Entry **backup_entries = NULL;
    Slapi_Entry **bep = NULL;
    Slapi_Entry **curr_entries = NULL;

    filename = slapi_ch_smprintf("%s/%s", src_dir, file_name);

    if (PR_SUCCESS != PR_Access(filename, PR_ACCESS_READ_OK)) {
        slapi_log_err(SLAPI_LOG_WARNING, "bdb_dse_conf_verify_core",
                      "Config backup file %s not found in backup\n",
                      file_name);
        rval = 0;
        goto out;
    }

    fd = bdb_open_huge_file(filename, O_RDONLY, 0);
    if (fd < 0) {
        slapi_log_err(SLAPI_LOG_ERR, "bdb_dse_conf_verify_core",
                      "Can't open config backup file: %s\n", filename);
        rval = -1;
        goto out;
    }

    bdb_import_init_ldif(&c);
    bep = backup_entries = (Slapi_Entry **)slapi_ch_calloc(1,
                                                           backup_entry_len * sizeof(Slapi_Entry *));

    while (!finished) {
        char *estr = NULL;
        Slapi_Entry *e = NULL;
        estr = bdb_import_get_entry(&c, fd, &curr_lineno);

        if (!estr)
            break;

        e = slapi_str2entry(estr, 0);
        slapi_ch_free_string(&estr);
        if (!e) {
            slapi_log_err(SLAPI_LOG_WARNING, "bdb_dse_conf_verify_core",
                          "Skipping bad LDIF entry ending line %d of file \"%s\"\n",
                          curr_lineno, filename);
            continue;
        }
        if (bep - backup_entries >= backup_entry_len) {
            backup_entries = (Slapi_Entry **)slapi_ch_realloc((char *)backup_entries,
                                                              2 * backup_entry_len * sizeof(Slapi_Entry *));
            bep = backup_entries + backup_entry_len;
            backup_entry_len *= 2;
        }
        *bep = e;
        bep++;
    }
    /* 623986: terminate the list if we reallocated backup_entries */
    if (backup_entry_len > 256) {
        *bep = NULL;
    }

    search_scope = slapi_ch_strdup(li->li_plugin->plg_dn);

    Slapi_PBlock *srch_pb = slapi_pblock_new();

    slapi_search_internal_set_pb(srch_pb, search_scope,
                                 LDAP_SCOPE_SUBTREE, filter, NULL, 0, NULL, NULL, li->li_identity, 0);
    slapi_search_internal_pb(srch_pb);
    slapi_pblock_get(srch_pb, SLAPI_PLUGIN_INTOP_SEARCH_ENTRIES, &curr_entries);


    if (0 != slapi_entries_diff(backup_entries, curr_entries, 1 /* test_all */,
                                log_str, 1 /* force_update */, li->li_identity)) {
        slapi_log_err(SLAPI_LOG_WARNING, "bdb_dse_conf_verify_core",
                      "Current %s is different from backed up configuration; "
                      "The backup is restored.\n",
                      log_str);
    }

    slapi_free_search_results_internal(srch_pb);
    slapi_pblock_destroy(srch_pb);
    bdb_import_free_ldif(&c);
out:
    for (bep = backup_entries; bep && *bep; bep++) {
        slapi_entry_free(*bep);
    }
    slapi_ch_free((void **)&backup_entries);

    slapi_ch_free_string(&filename);

    slapi_ch_free_string(&search_scope);


    if (fd >= 0) {
        close(fd);
    }

    return rval;
}

int
bdb_dse_conf_verify(struct ldbminfo *li, char *src_dir)
{
    int rval;
    char *instance_entry_filter = NULL;

    instance_entry_filter = slapi_ch_strdup(DSE_INSTANCE_FILTER);

    rval = bdb_dse_conf_verify_core(li, src_dir, DSE_INSTANCE, instance_entry_filter,
                                "Instance Config");
    rval |= bdb_dse_conf_verify_core(li, src_dir, DSE_INDEX, DSE_INDEX_FILTER,
                                 "Index Config");

    slapi_ch_free_string(&instance_entry_filter);

    return rval;
}

static int
bdb_import_get_and_add_parent_rdns(ImportWorkerInfo *info,
                               ldbm_instance *inst,
                               DB *db,
                               ID id,
                               ID *total_id,
                               Slapi_RDN *srdn,
                               int *curr_entry)
{
    int rc = -1;
    struct backdn *bdn = NULL;
    Slapi_Entry *e = NULL;
    char *normdn = NULL;

    if (NULL == inst || NULL == srdn) {
        slapi_log_err(SLAPI_LOG_ERR, "bdb_import_get_and_add_parent_rdns",
                      "Empty %s\n", NULL == inst ? "inst" : "srdn");
        return rc;
    }

    /* first, try the dn cache */
    bdn = dncache_find_id(&inst->inst_dncache, id);
    if (bdn) {
        Slapi_RDN mysrdn = {0};
        /* Luckily, found the parent in the dn cache! */
        if (slapi_rdn_get_rdn(srdn)) { /* srdn is already in use */
            rc = slapi_rdn_init_all_dn(&mysrdn, slapi_sdn_get_dn(bdn->dn_sdn));
            if (rc) {
                slapi_log_err(SLAPI_LOG_ERR, "bdb_import_get_and_add_parent_rdns",
                              "Failed to convert DN %s to RDN\n",
                              slapi_sdn_get_dn(bdn->dn_sdn));
                slapi_rdn_done(&mysrdn);
                CACHE_RETURN(&inst->inst_dncache, &bdn);
                return rc;
            }
            rc = slapi_rdn_add_srdn_to_all_rdns(srdn, &mysrdn);
            if (rc) {
                slapi_log_err(SLAPI_LOG_ERR, "bdb_import_get_and_add_parent_rdns",
                              "Failed to merge Slapi_RDN %s to RDN\n",
                              slapi_sdn_get_dn(bdn->dn_sdn));
            }
            slapi_rdn_done(&mysrdn);
        } else { /* srdn is empty */
            rc = slapi_rdn_init_all_dn(srdn, slapi_sdn_get_dn(bdn->dn_sdn));
            if (rc) {
                slapi_log_err(SLAPI_LOG_ERR, "bdb_import_get_and_add_parent_rdns",
                              "Failed to convert DN %s to RDN\n",
                              slapi_sdn_get_dn(bdn->dn_sdn));
                CACHE_RETURN(&inst->inst_dncache, &bdn);
                return rc;
            }
        }
        CACHE_RETURN(&inst->inst_dncache, &bdn);
        return rc;
    } else {
        DBT key, data;
        char *rdn = NULL;
        char *pid_str = NULL;
        ID storedid;
        Slapi_RDN mysrdn = {0};

        /* not in the dn cache; read id2entry */
        if (NULL == db) {
            slapi_log_err(SLAPI_LOG_ERR, "bdb_import_get_and_add_parent_rdns",
                          "Empty db\n");
            return rc;
        }
        id_internal_to_stored(id, (char *)&storedid);
        key.size = key.ulen = sizeof(ID);
        key.data = &storedid;
        key.flags = DB_DBT_USERMEM;

        memset(&data, 0, sizeof(data));
        data.flags = DB_DBT_MALLOC;
        rc = db->get(db, NULL, &key, &data, 0);
        if (rc) {
            slapi_log_err(SLAPI_LOG_ERR, "bdb_import_get_and_add_parent_rdns",
                          "Failed to position at ID " ID_FMT "\n", id);
            return rc;
        }
        /* rdn is allocated in get_value_from_string */
        rc = get_value_from_string((const char *)data.dptr, "rdn", &rdn);
        if (rc) {
            slapi_log_err(SLAPI_LOG_ERR, "bdb_import_get_and_add_parent_rdns",
                          "Failed to get rdn of entry " ID_FMT "\n", id);
            goto bail;
        }
        /* rdn is set to srdn */
        rc = slapi_rdn_init_all_dn(&mysrdn, rdn);
        if (rc < 0) { /* expect rc == 1 since we are setting "rdn" not "dn" */
            slapi_log_err(SLAPI_LOG_ERR, "bdb_import_get_and_add_parent_rdns",
                          "Failed to add rdn %s of entry " ID_FMT "\n", rdn, id);
            goto bail;
        }
        rc = get_value_from_string((const char *)data.dptr,
                                   LDBM_PARENTID_STR, &pid_str);
        if (rc) {
            rc = 0; /* assume this is a suffix */
        } else {
            ID pid = (ID)strtol(pid_str, (char **)NULL, 10);
            slapi_ch_free_string(&pid_str);
            rc = bdb_import_get_and_add_parent_rdns(info, inst, db, pid, total_id,
                                                &mysrdn, curr_entry);
            if (rc) {
                slapi_ch_free_string(&rdn);
                goto bail;
            }
        }

        normdn = NULL;
        rc = slapi_rdn_get_dn(&mysrdn, &normdn);
        if (rc) {
            slapi_log_err(SLAPI_LOG_ERR, "bdb_import_get_and_add_parent_rdns",
                          "Failed to compose dn for (rdn: %s, ID: %d) "
                          "from Slapi_RDN\n",
                          rdn, id);
            goto bail;
        }
        e = slapi_str2entry_ext(normdn, NULL, data.dptr, SLAPI_STR2ENTRY_NO_ENTRYDN);
        (*curr_entry)++;
        rc = bdb_index_set_entry_to_fifo(info, e, id, total_id, *curr_entry);
        if (rc) {
            goto bail;
        }
        rc = slapi_rdn_add_srdn_to_all_rdns(srdn, &mysrdn);
        if (rc) {
            slapi_log_err(SLAPI_LOG_ERR, "bdb_import_get_and_add_parent_rdns",
                          "Failed to merge Slapi_RDN to RDN\n");
        }
    bail:
        slapi_ch_free(&data.data);
        slapi_ch_free_string(&rdn);
        return rc;
    }
}

static int
_get_import_entryusn(ImportJob *job, Slapi_Value **usn_value)
{
#define USN_COUNTER_BUF_LEN 64 /* enough size for 64 bit integers */
    static char counter_buf[USN_COUNTER_BUF_LEN] = {0};
    char *usn_init_str = NULL;
    long long usn_init;
    char *endptr = NULL;
    struct berval usn_berval = {0};

    if (NULL == usn_value) {
        return 1;
    }
    *usn_value = NULL;
    /*
     * Check if entryusn plugin is enabled.
     * If yes, get entryusn to set depending upon nsslapd-entryusn-import-init
     */
    if (!plugin_enabled("USN", (void *)plugin_get_default_component_id())) {
        return 1;
    }
    /* get the import_init config param */
    usn_init_str = config_get_entryusn_import_init();
    if (usn_init_str) {
        /* nsslapd-entryusn-import-init has a value */
        usn_init = strtoll(usn_init_str, &endptr, 10);
        if (errno || (0 == usn_init && endptr == usn_init_str)) {
            ldbm_instance *inst = job->inst;
            backend *be = inst->inst_be;
            /* import_init value is not digit.
             * Use the counter which stores the old DB's
             * next entryusn. */
            PR_snprintf(counter_buf, sizeof(counter_buf),
                        "%" PRIu64, slapi_counter_get_value(be->be_usn_counter));
        } else {
            /* import_init value is digit.
             * Initialize the entryusn values with the digit */
            PR_snprintf(counter_buf, sizeof(counter_buf), "%s", usn_init_str);
        }
        slapi_ch_free_string(&usn_init_str);
    } else {
        /* nsslapd-entryusn-import-init is not defined */
        /* Initialize to 0 by default */
        PR_snprintf(counter_buf, sizeof(counter_buf), "0");
    }
    usn_berval.bv_val = counter_buf;
    usn_berval.bv_len = strlen(usn_berval.bv_val);
    *usn_value = slapi_value_new_berval(&usn_berval);
    return 0;
}
