- /*
+ /*
Trivial Database 2: human-readable summary code
Copyright (C) Rusty Russell 2010
-
+
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
#include <assert.h>
#include <ccan/tally/tally.h>
-static int count_hash(struct tdb_context *tdb,
- tdb_off_t hash_off, unsigned bits)
+static tdb_off_t count_hash(struct tdb_context *tdb,
+ tdb_off_t hash_off, unsigned bits)
{
const tdb_off_t *h;
- unsigned int i, count = 0;
+ tdb_off_t count = 0;
+ unsigned int i;
h = tdb_access_read(tdb, hash_off, sizeof(*h) << bits, true);
- if (!h)
- return -1;
+ if (TDB_PTR_IS_ERR(h)) {
+ return TDB_PTR_ERR(h);
+ }
for (i = 0; i < (1 << bits); i++)
count += (h[i] != 0);
return count;
}
-static bool summarize(struct tdb_context *tdb,
- struct tally *hashes,
- struct tally *flists,
- struct tally *free,
- struct tally *keys,
- struct tally *data,
- struct tally *extra,
- struct tally *uncoal,
- struct tally *buckets)
+static enum TDB_ERROR summarize(struct tdb_context *tdb,
+ struct tally *hashes,
+ struct tally *ftables,
+ struct tally *fr,
+ struct tally *keys,
+ struct tally *data,
+ struct tally *extra,
+ struct tally *uncoal,
+ struct tally *chains)
{
tdb_off_t off;
tdb_len_t len;
tdb_len_t unc = 0;
- for (off = sizeof(struct tdb_header); off < tdb->map_size; off += len) {
- union {
+ for (off = sizeof(struct tdb_header);
+ off < tdb->file->map_size;
+ off += len) {
+ const union {
struct tdb_used_record u;
struct tdb_free_record f;
struct tdb_recovery_record r;
- } pad, *p;
+ } *p;
/* We might not be able to get the whole thing. */
- p = tdb_get(tdb, off, &pad, sizeof(p->f));
- if (!p)
- return false;
+ p = tdb_access_read(tdb, off, sizeof(p->f), true);
+ if (TDB_PTR_IS_ERR(p)) {
+ return TDB_PTR_ERR(p);
+ }
+ if (frec_magic(&p->f) != TDB_FREE_MAGIC) {
+ if (unc > 1) {
+ tally_add(uncoal, unc);
+ unc = 0;
+ }
+ }
+
if (p->r.magic == TDB_RECOVERY_INVALID_MAGIC
|| p->r.magic == TDB_RECOVERY_MAGIC) {
len = sizeof(p->r) + p->r.max_len;
- } else if (rec_magic(&p->u) != TDB_MAGIC) {
+ } else if (frec_magic(&p->f) == TDB_FREE_MAGIC) {
len = frec_len(&p->f);
- tally_add(free, len);
- tally_add(buckets, size_to_bucket(len));
+ tally_add(fr, len);
len += sizeof(p->u);
unc++;
- } else if (frec_magic(&p->f) == TDB_FREE_MAGIC) {
- if (unc) {
- tally_add(uncoal, unc);
- unc = 0;
- }
+ } else if (rec_magic(&p->u) == TDB_USED_MAGIC) {
len = sizeof(p->u)
+ rec_key_length(&p->u)
+ rec_data_length(&p->u)
+ rec_extra_padding(&p->u);
- /* FIXME: Use different magic for hashes, flists. */
- if (!rec_key_length(&p->u) && rec_hash(&p->u) < 2) {
- if (rec_hash(&p->u) == 0) {
- int count = count_hash(tdb,
- off + sizeof(p->u),
- TDB_SUBLEVEL_HASH_BITS);
- if (count == -1)
- return false;
- tally_add(hashes, count);
- } else {
- tally_add(flists,
- rec_data_length(&p->u));
- }
- } else {
- tally_add(keys, rec_key_length(&p->u));
- tally_add(data, rec_data_length(&p->u));
+ tally_add(keys, rec_key_length(&p->u));
+ tally_add(data, rec_data_length(&p->u));
+ tally_add(extra, rec_extra_padding(&p->u));
+ } else if (rec_magic(&p->u) == TDB_HTABLE_MAGIC) {
+ tdb_off_t count = count_hash(tdb,
+ off + sizeof(p->u),
+ TDB_SUBLEVEL_HASH_BITS);
+ if (TDB_OFF_IS_ERR(count)) {
+ return count;
}
+ tally_add(hashes, count);
tally_add(extra, rec_extra_padding(&p->u));
- } else
+ len = sizeof(p->u)
+ + rec_data_length(&p->u)
+ + rec_extra_padding(&p->u);
+ } else if (rec_magic(&p->u) == TDB_FTABLE_MAGIC) {
+ len = sizeof(p->u)
+ + rec_data_length(&p->u)
+ + rec_extra_padding(&p->u);
+ tally_add(ftables, rec_data_length(&p->u));
+ tally_add(extra, rec_extra_padding(&p->u));
+ } else if (rec_magic(&p->u) == TDB_CHAIN_MAGIC) {
+ len = sizeof(p->u)
+ + rec_data_length(&p->u)
+ + rec_extra_padding(&p->u);
+ tally_add(chains, 1);
+ tally_add(extra, rec_extra_padding(&p->u));
+ } else {
len = dead_space(tdb, off);
+ if (TDB_OFF_IS_ERR(len)) {
+ return len;
+ }
+ }
+ tdb_access_release(tdb, p);
}
if (unc)
tally_add(uncoal, unc);
- return true;
+ return TDB_SUCCESS;
}
#define SUMMARY_FORMAT \
"Smallest/average/largest free records: %zu/%zu/%zu\n%s" \
"Number of uncoalesced records: %zu\n" \
"Smallest/average/largest uncoalesced runs: %zu/%zu/%zu\n%s" \
- "Number of free lists: %zu\n%s" \
"Toplevel hash used: %u of %u\n" \
+ "Number of chains: %zu\n" \
"Number of subhashes: %zu\n" \
"Smallest/average/largest subhash entries: %zu/%zu/%zu\n%s" \
"Percentage keys/data/padding/free/rechdrs/freehdrs/hashes: %.0f/%.0f/%.0f/%.0f/%.0f/%.0f/%.0f\n"
#define HISTO_WIDTH 70
#define HISTO_HEIGHT 20
-char *tdb_summary(struct tdb_context *tdb, enum tdb_summary_flags flags)
+enum TDB_ERROR tdb_summary(struct tdb_context *tdb,
+ enum tdb_summary_flags flags,
+ char **summary)
{
tdb_len_t len;
- struct tally *flists, *hashes, *freet, *keys, *data, *extra, *uncoal,
- *buckets;
- char *hashesg, *freeg, *keysg, *datag, *extrag, *uncoalg, *bucketsg;
- char *ret = NULL;
+ struct tally *ftables, *hashes, *freet, *keys, *data, *extra, *uncoal,
+ *chains;
+ char *hashesg, *freeg, *keysg, *datag, *extrag, *uncoalg;
+ enum TDB_ERROR ecode;
- hashesg = freeg = keysg = datag = extrag = uncoalg = bucketsg = NULL;
+ hashesg = freeg = keysg = datag = extrag = uncoalg = NULL;
- if (tdb_allrecord_lock(tdb, F_RDLCK, TDB_LOCK_WAIT, false) != 0)
- return NULL;
+ ecode = tdb_allrecord_lock(tdb, F_RDLCK, TDB_LOCK_WAIT, false);
+ if (ecode != TDB_SUCCESS) {
+ return tdb->last_error = ecode;
+ }
- if (tdb_lock_expand(tdb, F_RDLCK) != 0) {
+ ecode = tdb_lock_expand(tdb, F_RDLCK);
+ if (ecode != TDB_SUCCESS) {
tdb_allrecord_unlock(tdb, F_RDLCK);
- return NULL;
+ return tdb->last_error = ecode;
}
/* Start stats off empty. */
- flists = tally_new(HISTO_HEIGHT);
+ ftables = tally_new(HISTO_HEIGHT);
hashes = tally_new(HISTO_HEIGHT);
freet = tally_new(HISTO_HEIGHT);
keys = tally_new(HISTO_HEIGHT);
data = tally_new(HISTO_HEIGHT);
extra = tally_new(HISTO_HEIGHT);
uncoal = tally_new(HISTO_HEIGHT);
- buckets = tally_new(HISTO_HEIGHT);
- if (!flists || !hashes || !freet || !keys || !data || !extra
- || !uncoal || !buckets) {
- tdb->ecode = TDB_ERR_OOM;
+ chains = tally_new(HISTO_HEIGHT);
+ if (!ftables || !hashes || !freet || !keys || !data || !extra
+ || !uncoal || !chains) {
+ ecode = tdb_logerr(tdb, TDB_ERR_OOM, TDB_LOG_ERROR,
+ "tdb_summary: failed to allocate"
+ " tally structures");
goto unlock;
}
- if (!summarize(tdb, hashes, flists, freet, keys, data, extra, uncoal,
- buckets))
+ ecode = summarize(tdb, hashes, ftables, freet, keys, data, extra,
+ uncoal, chains);
+ if (ecode != TDB_SUCCESS) {
goto unlock;
+ }
if (flags & TDB_SUMMARY_HISTOGRAMS) {
hashesg = tally_histogram(hashes, HISTO_WIDTH, HISTO_HEIGHT);
datag = tally_histogram(data, HISTO_WIDTH, HISTO_HEIGHT);
extrag = tally_histogram(extra, HISTO_WIDTH, HISTO_HEIGHT);
uncoalg = tally_histogram(uncoal, HISTO_WIDTH, HISTO_HEIGHT);
- bucketsg = tally_histogram(buckets, HISTO_WIDTH, HISTO_HEIGHT);
}
/* 20 is max length of a %llu. */
+ (keysg ? strlen(keysg) : 0)
+ (datag ? strlen(datag) : 0)
+ (extrag ? strlen(extrag) : 0)
- + (uncoalg ? strlen(uncoalg) : 0)
- + (bucketsg ? strlen(bucketsg) : 0);
+ + (uncoalg ? strlen(uncoalg) : 0);
- ret = malloc(len);
- if (!ret)
+ *summary = malloc(len);
+ if (!*summary) {
+ ecode = tdb_logerr(tdb, TDB_ERR_OOM, TDB_LOG_ERROR,
+ "tdb_summary: failed to allocate string");
goto unlock;
+ }
- len = sprintf(ret, SUMMARY_FORMAT,
- (size_t)tdb->map_size,
- tally_num(keys) + tally_num(data),
- tally_num(keys),
- tally_min(keys), tally_mean(keys), tally_max(keys),
- keysg ? keysg : "",
- tally_min(data), tally_mean(data), tally_max(data),
- datag ? datag : "",
- tally_min(extra), tally_mean(extra), tally_max(extra),
- extrag ? extrag : "",
- tally_num(freet),
- tally_min(freet), tally_mean(freet), tally_max(freet),
- freeg ? freeg : "",
- tally_total(uncoal, NULL),
- tally_min(uncoal), tally_mean(uncoal), tally_max(uncoal),
- uncoalg ? uncoalg : "",
- tally_num(buckets),
- bucketsg ? bucketsg : "",
- count_hash(tdb, offsetof(struct tdb_header, hashtable),
- TDB_TOPLEVEL_HASH_BITS),
- 1 << TDB_TOPLEVEL_HASH_BITS,
- tally_num(hashes),
- tally_min(hashes), tally_mean(hashes), tally_max(hashes),
- hashesg ? hashesg : "",
- tally_total(keys, NULL) * 100.0 / tdb->map_size,
- tally_total(data, NULL) * 100.0 / tdb->map_size,
- tally_total(extra, NULL) * 100.0 / tdb->map_size,
- tally_total(freet, NULL) * 100.0 / tdb->map_size,
- (tally_num(keys) + tally_num(freet) + tally_num(hashes))
- * sizeof(struct tdb_used_record) * 100.0 / tdb->map_size,
- tally_num(flists) * sizeof(struct tdb_freelist)
- * 100.0 / tdb->map_size,
- (tally_num(hashes)
- * (sizeof(tdb_off_t) << TDB_SUBLEVEL_HASH_BITS)
- + (sizeof(tdb_off_t) << TDB_TOPLEVEL_HASH_BITS))
- * 100.0 / tdb->map_size);
+ sprintf(*summary, SUMMARY_FORMAT,
+ (size_t)tdb->file->map_size,
+ tally_total(keys, NULL) + tally_total(data, NULL),
+ tally_num(keys),
+ tally_min(keys), tally_mean(keys), tally_max(keys),
+ keysg ? keysg : "",
+ tally_min(data), tally_mean(data), tally_max(data),
+ datag ? datag : "",
+ tally_min(extra), tally_mean(extra), tally_max(extra),
+ extrag ? extrag : "",
+ tally_num(freet),
+ tally_min(freet), tally_mean(freet), tally_max(freet),
+ freeg ? freeg : "",
+ tally_total(uncoal, NULL),
+ tally_min(uncoal), tally_mean(uncoal), tally_max(uncoal),
+ uncoalg ? uncoalg : "",
+ (unsigned)count_hash(tdb, offsetof(struct tdb_header,
+ hashtable),
+ TDB_TOPLEVEL_HASH_BITS),
+ 1 << TDB_TOPLEVEL_HASH_BITS,
+ tally_num(chains),
+ tally_num(hashes),
+ tally_min(hashes), tally_mean(hashes), tally_max(hashes),
+ hashesg ? hashesg : "",
+ tally_total(keys, NULL) * 100.0 / tdb->file->map_size,
+ tally_total(data, NULL) * 100.0 / tdb->file->map_size,
+ tally_total(extra, NULL) * 100.0 / tdb->file->map_size,
+ tally_total(freet, NULL) * 100.0 / tdb->file->map_size,
+ (tally_num(keys) + tally_num(freet) + tally_num(hashes))
+ * sizeof(struct tdb_used_record) * 100.0 / tdb->file->map_size,
+ tally_num(ftables) * sizeof(struct tdb_freetable)
+ * 100.0 / tdb->file->map_size,
+ (tally_num(hashes)
+ * (sizeof(tdb_off_t) << TDB_SUBLEVEL_HASH_BITS)
+ + (sizeof(tdb_off_t) << TDB_TOPLEVEL_HASH_BITS)
+ + sizeof(struct tdb_chain) * tally_num(chains))
+ * 100.0 / tdb->file->map_size);
unlock:
free(hashesg);
free(datag);
free(extrag);
free(uncoalg);
- free(bucketsg);
free(hashes);
- free(buckets);
free(freet);
free(keys);
free(data);
free(extra);
free(uncoal);
+ free(ftables);
+ free(chains);
tdb_allrecord_unlock(tdb, F_RDLCK);
tdb_unlock_expand(tdb, F_RDLCK);
- return ret;
+ return tdb->last_error = ecode;
}
projects / ccan / blobdiff