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/*
OpenChange Storage Abstraction Layer library
OpenChange Project
Copyright (C) Julien Kerihuel 2009-2012
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <sys/types.h>
#include <dirent.h>
#include <fcntl.h>
#include <string.h>
#include <errno.h>
#include "mapistore.h"
#include "mapistore_errors.h"
#include "mapistore_private.h"
#include <dlinklist.h>
#include "libmapi/libmapi_private.h"
#include <tdb.h>
char *mapping_path = NULL;
/**
\details Set the mapping path
\param path pointer to the mapping path
\note The mapping path can be set unless id_mapping_context is
initialized. If path is NULL and mapping path is not yet
initialized, then mapping_path will be reset to its default value
when the initialization routine is called.
\return MAPISTORE_SUCCESS on success, otherwise MAPISTORE error
*/
_PUBLIC_ enum mapistore_error mapistore_set_mapping_path(const char *path)
{
TALLOC_CTX *mem_ctx;
DIR *dir;
/* Case 1. Path is set to NULL */
if (!path) {
if (mapping_path) {
talloc_free(mapping_path);
}
mapping_path = NULL;
return MAPISTORE_SUCCESS;
}
if (mapping_path) {
talloc_free(mapping_path);
mapping_path = NULL;
}
/* Case 2. path is initialized */
/* Step 1. Check if path is valid path */
dir = opendir(path);
MAPISTORE_RETVAL_IF(!dir, MAPISTORE_ERR_NO_DIRECTORY, NULL);
/* Step 2. TODO: Check for write permissions */
/* FIXME: Should have a better error name here */
MAPISTORE_RETVAL_IF(closedir(dir) == -1, MAPISTORE_ERR_NO_DIRECTORY, NULL);
mem_ctx = talloc_autofree_context();
mapping_path = talloc_strdup(mem_ctx, path);
return MAPISTORE_SUCCESS;
}
/**
\details Return the current mapping path
\return pointer to the mapping path.
*/
const char *mapistore_get_mapping_path(void)
{
return (const char *)mapping_path;
}
/**
\details Initialize the ID mapping context or return the existing
one if already initialized.
\param pctx pointer to the processing context
\return MAPISTORE_SUCCESS on success, otherwise MAPISTORE error
*/
enum mapistore_error mapistore_init_mapping_context(struct processing_context *pctx)
{
TDB_DATA key;
TDB_DATA dbuf;
TALLOC_CTX *mem_ctx;
char *dbpath;
uint64_t last_id;
char *tmp_buf;
int ret;
/* Sanity checks */
MAPISTORE_RETVAL_IF(!pctx, MAPISTORE_ERR_NOT_INITIALIZED, NULL);
MAPISTORE_RETVAL_IF(pctx->mapping_ctx, MAPISTORE_ERR_ALREADY_INITIALIZED, NULL);
pctx->mapping_ctx = talloc_zero(pctx, struct id_mapping_context);
MAPISTORE_RETVAL_IF(!pctx->mapping_ctx, MAPISTORE_ERR_NO_MEMORY, NULL);
mem_ctx = talloc_named(NULL, 0, "mapistore_init_mapping_context");
/* Open/Create the used ID database */
if (!pctx->mapping_ctx->used_ctx) {
dbpath = talloc_asprintf(mem_ctx, "%s/%s", mapistore_get_mapping_path(), MAPISTORE_DB_NAME_USED_ID);
pctx->mapping_ctx->used_ctx = mapistore_tdb_wrap_open(pctx, dbpath, 0, 0, O_RDWR|O_CREAT, 0600);
talloc_free(dbpath);
if (!pctx->mapping_ctx->used_ctx) {
DEBUG(3, ("[%s:%d]: %s\n", __FUNCTION__, __LINE__, strerror(errno)));
talloc_free(mem_ctx);
talloc_free(pctx->mapping_ctx);
return MAPISTORE_ERR_DATABASE_INIT;
}
}
/* Retrieve the last ID value */
key.dptr = (unsigned char *) MAPISTORE_DB_LAST_ID_KEY;
key.dsize = strlen(MAPISTORE_DB_LAST_ID_KEY);
dbuf = tdb_fetch(pctx->mapping_ctx->used_ctx->tdb, key);
/* If the record doesn't exist, insert it */
if (!dbuf.dptr || !dbuf.dsize) {
dbuf.dptr = (unsigned char *) talloc_asprintf(mem_ctx, "0x%"PRIx64, (uint64_t) MAPISTORE_DB_LAST_ID_VAL);
dbuf.dsize = strlen((const char *) dbuf.dptr);
last_id = MAPISTORE_DB_LAST_ID_VAL;
ret = tdb_store(pctx->mapping_ctx->used_ctx->tdb, key, dbuf, TDB_INSERT);
talloc_free(dbuf.dptr);
if (ret == -1) {
DEBUG(3, ("[%s:%d]: Unable to create %s record: %s\n", __FUNCTION__, __LINE__,
MAPISTORE_DB_LAST_ID_KEY, tdb_errorstr(pctx->mapping_ctx->used_ctx->tdb)));
talloc_free(mem_ctx);
talloc_free(pctx->mapping_ctx);
return MAPISTORE_ERR_DATABASE_OPS;
}
} else {
tmp_buf = talloc_strndup(mem_ctx, (char *)dbuf.dptr, dbuf.dsize);
free(dbuf.dptr);
last_id = strtoull(tmp_buf, NULL, 16);
talloc_free(tmp_buf);
}
pctx->mapping_ctx->last_id = last_id;
talloc_free(mem_ctx);
return MAPISTORE_SUCCESS;
}
/**
\details Return an unused or new context identifier
\param pctx pointer to the processing context
\param context_id pointer to the context identifier the function
returns
\return a non zero context identifier on success, otherwise 0.
*/
enum mapistore_error mapistore_get_context_id(struct processing_context *pctx, uint32_t *context_id)
{
struct context_id_list *el;
/* Sanity checks */
MAPISTORE_RETVAL_IF(!pctx, MAPISTORE_ERR_NOT_INITIALIZED, NULL);
/* Step 1. The free context list doesn't exist yet */
if (!pctx->free_ctx) {
pctx->last_context_id++;
*context_id = pctx->last_context_id;
}
/* Step 2. We have a free list */
for (el = pctx->free_ctx; el; el = el->next) {
if (el->context_id) {
*context_id = el->context_id;
DLIST_REMOVE(pctx->free_ctx, el);
break;
}
}
return MAPISTORE_SUCCESS;
}
/**
\details Add a context identifier to the list
\param pctx pointer to the processing context
\param context_id the identifier referencing the context to free
\return MAPISTORE_SUCCESS on success, otherwise MAPISTORE error
*/
enum mapistore_error mapistore_free_context_id(struct processing_context *pctx, uint32_t context_id)
{
struct context_id_list *el;
/* Sanity checks */
MAPISTORE_RETVAL_IF(!pctx, MAPISTORE_ERR_NOT_INITIALIZED, NULL);
/* Step 1. Ensure the list is not corrupted */
for (el = pctx->free_ctx; el; el = el->next) {
if (el->context_id == context_id) {
return MAPISTORE_ERR_CORRUPTED;
}
}
/* Step 2. Create the element and add it to the list */
el = talloc_zero((TALLOC_CTX *)pctx, struct context_id_list);
el->context_id = context_id;
DLIST_ADD_END(pctx->free_ctx, el, struct context_id_list *);
return MAPISTORE_SUCCESS;
}
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