/* This function's caller ignores most errors it returns.
If you extend this function, check the callsite to see if you have
to make it not-ignore additional error codes. */
svn_error_t *
svn_fs_fs__get_rep_reference(representation_t **rep,
svn_fs_t *fs,
svn_checksum_t *checksum,
apr_pool_t *pool)
{
fs_fs_data_t *ffd = fs->fsap_data;
svn_sqlite__stmt_t *stmt;
svn_boolean_t have_row;
SVN_ERR_ASSERT(ffd->rep_sharing_allowed);
if (! ffd->rep_cache_db)
SVN_ERR(svn_fs_fs__open_rep_cache(fs, pool));
/* We only allow SHA1 checksums in this table. */
if (checksum->kind != svn_checksum_sha1)
return svn_error_create(SVN_ERR_BAD_CHECKSUM_KIND, NULL,
_("Only SHA1 checksums can be used as keys in the "
"rep_cache table.\n"));
SVN_ERR(svn_sqlite__get_statement(&stmt, ffd->rep_cache_db, STMT_GET_REP));
SVN_ERR(svn_sqlite__bindf(stmt, "s",
svn_checksum_to_cstring(checksum, pool)));
SVN_ERR(svn_sqlite__step(&have_row, stmt));
if (have_row)
{
*rep = apr_pcalloc(pool, sizeof(**rep));
svn_fs_fs__id_txn_reset(&(*rep)->txn_id);
memcpy((*rep)->sha1_digest, checksum->digest,
sizeof((*rep)->sha1_digest));
(*rep)->has_sha1 = TRUE;
(*rep)->revision = svn_sqlite__column_revnum(stmt, 0);
(*rep)->item_index = svn_sqlite__column_int64(stmt, 1);
(*rep)->size = svn_sqlite__column_int64(stmt, 2);
(*rep)->expanded_size = svn_sqlite__column_int64(stmt, 3);
}
else
*rep = NULL;
SVN_ERR(svn_sqlite__reset(stmt));
if (*rep)
{
/* Check that REP refers to a revision that exists in FS. */
svn_error_t *err = svn_fs_fs__ensure_revision_exists((*rep)->revision,
fs, pool);
if (err)
return svn_error_createf(SVN_ERR_FS_CORRUPT, err,
"Checksum '%s' in rep-cache is beyond HEAD",
svn_checksum_to_cstring_display(checksum,
pool));
}
return SVN_NO_ERROR;
}
svn_error_t *
svn_fs_fs__set_rep_reference(svn_fs_t *fs,
representation_t *rep,
apr_pool_t *pool)
{
fs_fs_data_t *ffd = fs->fsap_data;
svn_sqlite__stmt_t *stmt;
svn_error_t *err;
svn_checksum_t checksum;
checksum.kind = svn_checksum_sha1;
checksum.digest = rep->sha1_digest;
SVN_ERR_ASSERT(ffd->rep_sharing_allowed);
if (! ffd->rep_cache_db)
SVN_ERR(svn_fs_fs__open_rep_cache(fs, pool));
/* We only allow SHA1 checksums in this table. */
if (! rep->has_sha1)
return svn_error_create(SVN_ERR_BAD_CHECKSUM_KIND, NULL,
_("Only SHA1 checksums can be used as keys in the "
"rep_cache table.\n"));
SVN_ERR(svn_sqlite__get_statement(&stmt, ffd->rep_cache_db, STMT_SET_REP));
SVN_ERR(svn_sqlite__bindf(stmt, "siiii",
svn_checksum_to_cstring(&checksum, pool),
(apr_int64_t) rep->revision,
(apr_int64_t) rep->item_index,
(apr_int64_t) rep->size,
(apr_int64_t) rep->expanded_size));
err = svn_sqlite__insert(NULL, stmt);
if (err)
{
representation_t *old_rep;
if (err->apr_err != SVN_ERR_SQLITE_CONSTRAINT)
return svn_error_trace(err);
svn_error_clear(err);
/* Constraint failed so the mapping for SHA1_CHECKSUM->REP
should exist. If so that's cool -- just do nothing. If not,
that's a red flag! */
SVN_ERR(svn_fs_fs__get_rep_reference(&old_rep, fs, &checksum, pool));
if (!old_rep)
{
/* Something really odd at this point, we failed to insert the
checksum AND failed to read an existing checksum. Do we need
to flag this? */
}
}
return SVN_NO_ERROR;
}
/* Start a transaction to take an SQLite reserved lock that prevents
other writes.
See unlock_rep_cache(). */
static svn_error_t *
lock_rep_cache(svn_fs_t *fs,
apr_pool_t *pool)
{
fs_fs_data_t *ffd = fs->fsap_data;
if (! ffd->rep_cache_db)
SVN_ERR(svn_fs_fs__open_rep_cache(fs, pool));
SVN_ERR(svn_sqlite__exec_statements(ffd->rep_cache_db, STMT_LOCK_REP));
return SVN_NO_ERROR;
}
svn_error_t *
svn_fs_fs__del_rep_reference(svn_fs_t *fs,
svn_revnum_t youngest,
apr_pool_t *pool)
{
fs_fs_data_t *ffd = fs->fsap_data;
svn_sqlite__stmt_t *stmt;
SVN_ERR_ASSERT(ffd->format >= SVN_FS_FS__MIN_REP_SHARING_FORMAT);
if (! ffd->rep_cache_db)
SVN_ERR(svn_fs_fs__open_rep_cache(fs, pool));
SVN_ERR(svn_sqlite__get_statement(&stmt, ffd->rep_cache_db,
STMT_DEL_REPS_YOUNGER_THAN_REV));
SVN_ERR(svn_sqlite__bindf(stmt, "r", youngest));
SVN_ERR(svn_sqlite__step_done(stmt));
return SVN_NO_ERROR;
}
/* This function's caller ignores most errors it returns.
If you extend this function, check the callsite to see if you have
to make it not-ignore additional error codes. */
svn_error_t *
svn_fs_fs__get_rep_reference(representation_t **rep,
svn_fs_t *fs,
svn_checksum_t *checksum,
apr_pool_t *pool)
{
fs_fs_data_t *ffd = fs->fsap_data;
svn_sqlite__stmt_t *stmt;
svn_boolean_t have_row;
SVN_ERR_ASSERT(ffd->rep_sharing_allowed);
if (! ffd->rep_cache_db)
SVN_ERR(svn_fs_fs__open_rep_cache(fs, pool));
/* We only allow SHA1 checksums in this table. */
if (checksum->kind != svn_checksum_sha1)
return svn_error_create(SVN_ERR_BAD_CHECKSUM_KIND, NULL,
_("Only SHA1 checksums can be used as keys in the "
"rep_cache table.\n"));
SVN_ERR(svn_sqlite__get_statement(&stmt, ffd->rep_cache_db, STMT_GET_REP));
SVN_ERR(svn_sqlite__bindf(stmt, "s",
svn_checksum_to_cstring(checksum, pool)));
SVN_ERR(svn_sqlite__step(&have_row, stmt));
if (have_row)
{
*rep = apr_pcalloc(pool, sizeof(**rep));
(*rep)->sha1_checksum = svn_checksum_dup(checksum, pool);
(*rep)->revision = svn_sqlite__column_revnum(stmt, 0);
(*rep)->offset = svn_sqlite__column_int64(stmt, 1);
(*rep)->size = svn_sqlite__column_int64(stmt, 2);
(*rep)->expanded_size = svn_sqlite__column_int64(stmt, 3);
}
else
*rep = NULL;
if (*rep)
SVN_ERR(rep_has_been_born(*rep, fs, pool));
return svn_sqlite__reset(stmt);
}
svn_error_t *
svn_fs_fs__set_rep_reference(svn_fs_t *fs,
representation_t *rep,
svn_boolean_t reject_dup,
apr_pool_t *pool)
{
fs_fs_data_t *ffd = fs->fsap_data;
svn_sqlite__stmt_t *stmt;
svn_error_t *err;
SVN_ERR_ASSERT(ffd->rep_sharing_allowed);
if (! ffd->rep_cache_db)
SVN_ERR(svn_fs_fs__open_rep_cache(fs, pool));
/* We only allow SHA1 checksums in this table. */
if (rep->sha1_checksum == NULL)
return svn_error_create(SVN_ERR_BAD_CHECKSUM_KIND, NULL,
_("Only SHA1 checksums can be used as keys in the "
"rep_cache table.\n"));
SVN_ERR(svn_sqlite__get_statement(&stmt, ffd->rep_cache_db, STMT_SET_REP));
SVN_ERR(svn_sqlite__bindf(stmt, "siiii",
svn_checksum_to_cstring(rep->sha1_checksum, pool),
(apr_int64_t) rep->revision,
(apr_int64_t) rep->offset,
(apr_int64_t) rep->size,
(apr_int64_t) rep->expanded_size));
err = svn_sqlite__insert(NULL, stmt);
if (err)
{
representation_t *old_rep;
if (err->apr_err != SVN_ERR_SQLITE_CONSTRAINT)
return svn_error_trace(err);
svn_error_clear(err);
/* Constraint failed so the mapping for SHA1_CHECKSUM->REP
should exist. If so, and the value is the same one we were
about to write, that's cool -- just do nothing. If, however,
the value is *different*, that's a red flag! */
SVN_ERR(svn_fs_fs__get_rep_reference(&old_rep, fs, rep->sha1_checksum,
pool));
if (old_rep)
{
if (reject_dup && ((old_rep->revision != rep->revision)
|| (old_rep->offset != rep->offset)
|| (old_rep->size != rep->size)
|| (old_rep->expanded_size != rep->expanded_size)))
return svn_error_createf(SVN_ERR_FS_CORRUPT, NULL,
apr_psprintf(pool,
_("Representation key for checksum '%%s' exists "
"in filesystem '%%s' with a different value "
"(%%ld,%%%s,%%%s,%%%s) than what we were about "
"to store (%%ld,%%%s,%%%s,%%%s)"),
APR_OFF_T_FMT, SVN_FILESIZE_T_FMT,
SVN_FILESIZE_T_FMT, APR_OFF_T_FMT,
SVN_FILESIZE_T_FMT, SVN_FILESIZE_T_FMT),
svn_checksum_to_cstring_display(rep->sha1_checksum, pool),
fs->path, old_rep->revision, old_rep->offset, old_rep->size,
old_rep->expanded_size, rep->revision, rep->offset, rep->size,
rep->expanded_size);
else
return SVN_NO_ERROR;
}
else
{
/* Something really odd at this point, we failed to insert the
checksum AND failed to read an existing checksum. Do we need
to flag this? */
}
}
return SVN_NO_ERROR;
}
svn_error_t *
svn_fs_fs__walk_rep_reference(svn_fs_t *fs,
svn_error_t *(*walker)(representation_t *,
void *,
svn_fs_t *,
apr_pool_t *),
void *walker_baton,
svn_cancel_func_t cancel_func,
void *cancel_baton,
apr_pool_t *pool)
{
fs_fs_data_t *ffd = fs->fsap_data;
svn_sqlite__stmt_t *stmt;
svn_boolean_t have_row;
int iterations = 0;
apr_pool_t *iterpool = svn_pool_create(pool);
/* Don't check ffd->rep_sharing_allowed. */
SVN_ERR_ASSERT(ffd->format >= SVN_FS_FS__MIN_REP_SHARING_FORMAT);
if (! ffd->rep_cache_db)
SVN_ERR(svn_fs_fs__open_rep_cache(fs, pool));
/* Get the statement. (There are no arguments to bind.) */
SVN_ERR(svn_sqlite__get_statement(&stmt, ffd->rep_cache_db,
STMT_GET_ALL_REPS));
/* Walk the cache entries. */
SVN_ERR(svn_sqlite__step(&have_row, stmt));
while (have_row)
{
representation_t *rep;
const char *sha1_digest;
/* Clear ITERPOOL occasionally. */
if (iterations++ % 16 == 0)
svn_pool_clear(iterpool);
/* Check for cancellation. */
if (cancel_func)
SVN_ERR(cancel_func(cancel_baton));
/* Construct a representation_t. */
rep = apr_pcalloc(iterpool, sizeof(*rep));
sha1_digest = svn_sqlite__column_text(stmt, 0, iterpool);
SVN_ERR(svn_checksum_parse_hex(&rep->sha1_checksum,
svn_checksum_sha1, sha1_digest,
iterpool));
rep->revision = svn_sqlite__column_revnum(stmt, 1);
rep->offset = svn_sqlite__column_int64(stmt, 2);
rep->size = svn_sqlite__column_int64(stmt, 3);
rep->expanded_size = svn_sqlite__column_int64(stmt, 4);
/* Sanity check. */
if (rep)
SVN_ERR(rep_has_been_born(rep, fs, iterpool));
/* Walk. */
SVN_ERR(walker(rep, walker_baton, fs, iterpool));
SVN_ERR(svn_sqlite__step(&have_row, stmt));
}
SVN_ERR(svn_sqlite__reset(stmt));
svn_pool_destroy(iterpool);
return SVN_NO_ERROR;
}
svn_error_t *
svn_fs_fs__walk_rep_reference(svn_fs_t *fs,
svn_revnum_t start,
svn_revnum_t end,
svn_error_t *(*walker)(representation_t *,
void *,
svn_fs_t *,
apr_pool_t *),
void *walker_baton,
svn_cancel_func_t cancel_func,
void *cancel_baton,
apr_pool_t *pool)
{
fs_fs_data_t *ffd = fs->fsap_data;
svn_sqlite__stmt_t *stmt;
svn_boolean_t have_row;
int iterations = 0;
apr_pool_t *iterpool = svn_pool_create(pool);
/* Don't check ffd->rep_sharing_allowed. */
SVN_ERR_ASSERT(ffd->format >= SVN_FS_FS__MIN_REP_SHARING_FORMAT);
if (! ffd->rep_cache_db)
SVN_ERR(svn_fs_fs__open_rep_cache(fs, pool));
/* Check global invariants. */
if (start == 0)
{
svn_revnum_t max;
SVN_ERR(svn_sqlite__get_statement(&stmt, ffd->rep_cache_db,
STMT_GET_MAX_REV));
SVN_ERR(svn_sqlite__step(&have_row, stmt));
max = svn_sqlite__column_revnum(stmt, 0);
SVN_ERR(svn_sqlite__reset(stmt));
if (SVN_IS_VALID_REVNUM(max)) /* The rep-cache could be empty. */
SVN_ERR(svn_fs_fs__ensure_revision_exists(max, fs, iterpool));
}
SVN_ERR(svn_sqlite__get_statement(&stmt, ffd->rep_cache_db,
STMT_GET_REPS_FOR_RANGE));
SVN_ERR(svn_sqlite__bindf(stmt, "rr",
start, end));
/* Walk the cache entries. */
SVN_ERR(svn_sqlite__step(&have_row, stmt));
while (have_row)
{
representation_t *rep;
const char *sha1_digest;
svn_error_t *err;
svn_checksum_t *checksum;
/* Clear ITERPOOL occasionally. */
if (iterations++ % 16 == 0)
svn_pool_clear(iterpool);
/* Check for cancellation. */
if (cancel_func)
{
err = cancel_func(cancel_baton);
if (err)
return svn_error_compose_create(err, svn_sqlite__reset(stmt));
}
/* Construct a representation_t. */
rep = apr_pcalloc(iterpool, sizeof(*rep));
svn_fs_fs__id_txn_reset(&rep->txn_id);
sha1_digest = svn_sqlite__column_text(stmt, 0, iterpool);
err = svn_checksum_parse_hex(&checksum, svn_checksum_sha1,
sha1_digest, iterpool);
if (err)
return svn_error_compose_create(err, svn_sqlite__reset(stmt));
rep->has_sha1 = TRUE;
memcpy(rep->sha1_digest, checksum->digest, sizeof(rep->sha1_digest));
rep->revision = svn_sqlite__column_revnum(stmt, 1);
rep->item_index = svn_sqlite__column_int64(stmt, 2);
rep->size = svn_sqlite__column_int64(stmt, 3);
rep->expanded_size = svn_sqlite__column_int64(stmt, 4);
/* Walk. */
err = walker(rep, walker_baton, fs, iterpool);
if (err)
return svn_error_compose_create(err, svn_sqlite__reset(stmt));
SVN_ERR(svn_sqlite__step(&have_row, stmt));
}
SVN_ERR(svn_sqlite__reset(stmt));
svn_pool_destroy(iterpool);
return SVN_NO_ERROR;
}
