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/*-
* Copyright (c) 2014-2020 MongoDB, Inc.
* Copyright (c) 2008-2014 WiredTiger, Inc.
* All rights reserved.
*
* See the file LICENSE for redistribution information.
*/
#include "wt_internal.h"
/*
* __wt_tiered_create --
* Create a tiered tree structure for the given name.
*/
int
__wt_tiered_create(WT_SESSION_IMPL *session, const char *uri, bool exclusive, const char *config)
{
WT_DECL_RET;
char *meta_value;
const char *cfg[] = {WT_CONFIG_BASE(session, tiered_meta), config, NULL};
const char *metadata;
metadata = NULL;
/* If it can be opened, it already exists. */
if ((ret = __wt_metadata_search(session, uri, &meta_value)) != WT_NOTFOUND) {
if (exclusive)
WT_TRET(EEXIST);
goto err;
}
WT_RET_NOTFOUND_OK(ret);
if (!F_ISSET(S2C(session), WT_CONN_READONLY)) {
WT_ERR(__wt_config_merge(session, cfg, NULL, &metadata));
WT_ERR(__wt_metadata_insert(session, uri, metadata));
}
err:
__wt_free(session, metadata);
return (ret);
}
/*
* __wt_tiered_drop --
* Drop a tiered store.
*/
int
__wt_tiered_drop(WT_SESSION_IMPL *session, const char *uri, const char *cfg[])
{
WT_DATA_HANDLE *tier;
WT_DECL_RET;
WT_TIERED *tiered;
u_int i;
/* Get the tiered data handle. */
WT_RET(__wt_session_get_dhandle(session, uri, NULL, NULL, WT_DHANDLE_EXCLUSIVE));
tiered = (WT_TIERED *)session->dhandle;
/* Drop the tiers. */
for (i = 0; i < tiered->ntiers; i++) {
tier = tiered->tiers[i];
WT_ERR(__wt_schema_drop(session, tier->name, cfg));
}
ret = __wt_metadata_remove(session, uri);
err:
F_SET(session->dhandle, WT_DHANDLE_DISCARD);
WT_TRET(__wt_session_release_dhandle(session));
return (ret);
}
/*
* __wt_tiered_rename --
* Rename a tiered data source.
*/
int
__wt_tiered_rename(
WT_SESSION_IMPL *session, const char *olduri, const char *newuri, const char *cfg[])
{
WT_DECL_RET;
WT_TIERED *tiered;
/* Get the tiered data handle. */
WT_RET(__wt_session_get_dhandle(session, olduri, NULL, NULL, WT_DHANDLE_EXCLUSIVE));
tiered = (WT_TIERED *)session->dhandle;
/* TODO */
WT_UNUSED(olduri);
WT_UNUSED(newuri);
WT_UNUSED(cfg);
WT_UNUSED(tiered);
F_SET(session->dhandle, WT_DHANDLE_DISCARD);
WT_TRET(__wt_session_release_dhandle(session));
return (ret);
}
/*
* __wt_tiered_truncate --
* Truncate for a tiered data source.
*/
int
__wt_tiered_truncate(WT_SESSION_IMPL *session, const char *uri, const char *cfg[])
{
WT_DECL_RET;
WT_TIERED *tiered;
u_int i;
WT_RET(__wt_session_get_dhandle(session, uri, NULL, NULL, WT_DHANDLE_EXCLUSIVE));
tiered = (WT_TIERED *)session->dhandle;
WT_STAT_DATA_INCR(session, cursor_truncate);
/* Truncate the column groups. */
for (i = 0; i < tiered->ntiers; i++)
WT_ERR(__wt_schema_truncate(session, tiered->tiers[i]->name, cfg));
err:
WT_TRET(__wt_session_release_dhandle(session));
return (ret);
}
/*
* __wt_tiered_worker --
* Run a schema worker operation on each tier of a tiered data source.
*/
int
__wt_tiered_worker(WT_SESSION_IMPL *session, const char *uri,
int (*file_func)(WT_SESSION_IMPL *, const char *[]),
int (*name_func)(WT_SESSION_IMPL *, const char *, bool *), const char *cfg[], uint32_t open_flags)
{
WT_DATA_HANDLE *dhandle;
WT_DECL_RET;
WT_TIERED *tiered;
u_int i;
/*
* If this was an alter operation, we need to alter the configuration for the overall tree and
* then reread it so it isn't out of date. TODO not yet supported.
*/
if (FLD_ISSET(open_flags, WT_BTREE_ALTER))
WT_RET(ENOTSUP);
WT_RET(__wt_session_get_dhandle(session, uri, NULL, NULL, open_flags));
tiered = (WT_TIERED *)session->dhandle;
for (i = 0; i < tiered->ntiers; i++) {
dhandle = tiered->tiers[i];
WT_SAVE_DHANDLE(session,
ret = __wt_schema_worker(session, dhandle->name, file_func, name_func, cfg, open_flags));
WT_ERR(ret);
}
err:
WT_TRET(__wt_session_release_dhandle(session));
return (ret);
}
/*
* __tiered_open --
* Open a tiered data handle (internal version).
*/
static int
__tiered_open(WT_SESSION_IMPL *session, const char *cfg[])
{
WT_CONFIG cparser;
WT_CONFIG_ITEM ckey, cval, tierconf;
WT_DATA_HANDLE *dhandle;
WT_DECL_ITEM(buf);
WT_DECL_RET;
WT_TIERED *tiered;
u_int i;
const char **tiered_cfg;
dhandle = session->dhandle;
tiered = (WT_TIERED *)dhandle;
tiered_cfg = dhandle->cfg;
WT_UNUSED(cfg);
WT_RET(__wt_config_gets(session, tiered_cfg, "key_format", &cval));
WT_RET(__wt_strndup(session, cval.str, cval.len, &tiered->key_format));
WT_RET(__wt_config_gets(session, tiered_cfg, "value_format", &cval));
WT_RET(__wt_strndup(session, cval.str, cval.len, &tiered->value_format));
/* Point to some items in the copy to save re-parsing. */
WT_RET(__wt_config_gets(session, tiered_cfg, "tiered.tiers", &tierconf));
/*
* Count the number of tiers.
*/
__wt_config_subinit(session, &cparser, &tierconf);
while ((ret = __wt_config_next(&cparser, &ckey, &cval)) == 0)
++tiered->ntiers;
WT_RET_NOTFOUND_OK(ret);
WT_RET(__wt_scr_alloc(session, 0, &buf));
WT_ERR(__wt_calloc_def(session, tiered->ntiers, &tiered->tiers));
__wt_config_subinit(session, &cparser, &tierconf);
for (i = 0; i < tiered->ntiers; i++) {
WT_ERR(__wt_config_next(&cparser, &ckey, &cval));
WT_ERR(__wt_buf_fmt(session, buf, "%.*s", (int)ckey.len, ckey.str));
WT_ERR(__wt_session_get_dhandle(session, (const char *)buf->data, NULL, cfg, 0));
__wt_atomic_addi32(&session->dhandle->session_inuse, 1);
/* Load in reverse order (based on LSM logic). */
tiered->tiers[(tiered->ntiers - 1) - i] = session->dhandle;
WT_ERR(__wt_session_release_dhandle(session));
}
if (0) {
err:
__wt_free(session, tiered->tiers);
}
__wt_scr_free(session, &buf);
return (ret);
}
/*
* __wt_tiered_open --
* Open a tiered data handle.
*/
int
__wt_tiered_open(WT_SESSION_IMPL *session, const char *cfg[])
{
WT_DECL_RET;
WT_WITH_TXN_ISOLATION(session, WT_ISO_READ_UNCOMMITTED, ret = __tiered_open(session, cfg));
return (ret);
}
/*
* __wt_tiered_close --
* Close a tiered data handle.
*/
int
__wt_tiered_close(WT_SESSION_IMPL *session, WT_TIERED *tiered)
{
WT_DECL_RET;
u_int i;
ret = 0;
__wt_free(session, tiered->key_format);
__wt_free(session, tiered->value_format);
if (tiered->tiers != NULL) {
for (i = 0; i < tiered->ntiers; i++)
__wt_atomic_subi32(&tiered->tiers[i]->session_inuse, 1);
__wt_free(session, tiered->tiers);
}
return (ret);
}
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