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/*-
* Copyright (c) 2014-present MongoDB, Inc.
* Copyright (c) 2008-2014 WiredTiger, Inc.
* All rights reserved.
*
* See the file LICENSE for redistribution information.
*/
#include "wt_internal.h"
/*
* __wt_exclusive_handle_operation --
* Get exclusive access to a file and apply a function.
*/
int
__wt_exclusive_handle_operation(WT_SESSION_IMPL *session, const char *uri,
int (*file_func)(WT_SESSION_IMPL *, const char *[]), const char *cfg[], uint32_t open_flags)
{
WT_DECL_RET;
/*
* If the operation requires exclusive access, close any open file handles, including
* checkpoints.
*/
if (FLD_ISSET(open_flags, WT_DHANDLE_EXCLUSIVE)) {
WT_WITH_HANDLE_LIST_WRITE_LOCK(
session, ret = __wt_conn_dhandle_close_all(session, uri, false, false));
WT_RET(ret);
}
WT_RET(__wt_session_get_btree_ckpt(session, uri, cfg, open_flags));
WT_SAVE_DHANDLE(session, ret = file_func(session, cfg));
WT_TRET(__wt_session_release_dhandle(session));
return (ret);
}
/*
* __wt_schema_worker --
* Get Btree handles for the object and cycle through calls to an underlying worker function
* with each handle.
*/
int
__wt_schema_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_COLGROUP *colgroup;
WT_DATA_SOURCE *dsrc;
WT_DECL_RET;
WT_INDEX *idx;
WT_SESSION *wt_session;
WT_TABLE *table;
u_int i;
bool skip;
table = NULL;
skip = false;
if (name_func != NULL)
WT_ERR(name_func(session, uri, &skip));
/* If the callback said to skip this object, we're done. */
if (skip)
return (0);
/* Get the btree handle(s) and call the underlying function. */
if (WT_PREFIX_MATCH(uri, "file:")) {
if (file_func != NULL)
WT_ERR(__wt_exclusive_handle_operation(session, uri, file_func, cfg, open_flags));
} else if (WT_PREFIX_MATCH(uri, "colgroup:")) {
WT_ERR(__wt_schema_get_colgroup(session, uri, false, NULL, &colgroup));
WT_ERR(
__wt_schema_worker(session, colgroup->source, file_func, name_func, cfg, open_flags));
} else if (WT_PREFIX_MATCH(uri, "index:")) {
idx = NULL;
WT_ERR(__wt_schema_get_index(session, uri, false, false, &idx));
WT_ERR(__wt_schema_worker(session, idx->source, file_func, name_func, cfg, open_flags));
} else if (WT_PREFIX_MATCH(uri, "lsm:")) {
WT_ERR(__wt_lsm_tree_worker(session, uri, file_func, name_func, cfg, open_flags));
} else if (WT_PREFIX_MATCH(uri, "table:")) {
/*
* Note: we would like to use open_flags here (e.g., to lock the table exclusive during
* schema-changing operations), but that is currently problematic because we get the table
* again in order to discover column groups and indexes.
*/
WT_ERR(__wt_schema_get_table_uri(session, uri, false, 0, &table));
/*
* We could make a recursive call for each colgroup or index URI, but since we have already
* opened the table, we can take a short cut and skip straight to the sources. If we have a
* name function, it needs to know about the intermediate URIs.
*/
for (i = 0; i < WT_COLGROUPS(table); i++) {
colgroup = table->cgroups[i];
skip = false;
if (name_func != NULL)
WT_ERR(name_func(session, colgroup->name, &skip));
if (!skip)
WT_ERR(__wt_schema_worker(
session, colgroup->source, file_func, name_func, cfg, open_flags));
}
/*
* Some operations that walk handles, such as backup, need to open indexes. Others, such as
* checkpoints, do not. Opening indexes requires the handle write lock, so check whether
* that lock is held when deciding what to do.
*/
if (F_ISSET(session, WT_SESSION_LOCKED_TABLE_WRITE))
WT_ERR(__wt_schema_open_indices(session, table));
for (i = 0; i < table->nindices; i++) {
idx = table->indices[i];
skip = false;
if (name_func != NULL)
WT_ERR(name_func(session, idx->name, &skip));
if (!skip)
WT_ERR(
__wt_schema_worker(session, idx->source, file_func, name_func, cfg, open_flags));
}
} else if ((dsrc = __wt_schema_get_source(session, uri)) != NULL) {
wt_session = (WT_SESSION *)session;
if (file_func == __wt_salvage && dsrc->salvage != NULL)
WT_ERR(dsrc->salvage(dsrc, wt_session, uri, (WT_CONFIG_ARG *)cfg));
else if (file_func == __wt_verify && dsrc->verify != NULL)
WT_ERR(dsrc->verify(dsrc, wt_session, uri, (WT_CONFIG_ARG *)cfg));
else if (file_func == __wt_checkpoint)
;
else if (file_func == __wt_checkpoint_get_handles)
;
else if (file_func == __wt_checkpoint_sync)
;
else
WT_ERR(__wt_object_unsupported(session, uri));
} else
WT_ERR(__wt_bad_object_type(session, uri));
err:
if (table != NULL)
WT_TRET(__wt_schema_release_table(session, table));
return (ret);
}
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