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mirror_frr/mgmtd/mgmt_txn.c
Igor Ryzhov 9859f308d2 lib, mgmtd: add ability to request the exact node in get-data request 
RESTCONF expects to receive the exact node as a result, not the whole
data tree.

Signed-off-by: Igor Ryzhov <iryzhov@nfware.com>
2024-01-15 10:27:33 +02:00

2701 lines
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* MGMTD Transactions
*
* Copyright (C) 2021 Vmware, Inc.
* Pushpasis Sarkar <spushpasis@vmware.com>
*/
#include <zebra.h>
#include "darr.h"
#include "hash.h"
#include "jhash.h"
#include "libfrr.h"
#include "mgmt_msg.h"
#include "mgmt_msg_native.h"
#include "mgmtd/mgmt.h"
#include "mgmtd/mgmt_memory.h"
#include "mgmtd/mgmt_txn.h"
#define MGMTD_TXN_DBG(fmt, ...) \
DEBUGD(&mgmt_debug_txn, "TXN: %s: " fmt, __func__, ##__VA_ARGS__)
#define MGMTD_TXN_ERR(fmt, ...) \
zlog_err("%s: ERROR: " fmt, __func__, ##__VA_ARGS__)
#define MGMTD_TXN_LOCK(txn) mgmt_txn_lock(txn, __FILE__, __LINE__)
#define MGMTD_TXN_UNLOCK(txn) mgmt_txn_unlock(txn, __FILE__, __LINE__)
enum mgmt_txn_event {
MGMTD_TXN_PROC_SETCFG = 1,
MGMTD_TXN_PROC_COMMITCFG,
MGMTD_TXN_PROC_GETCFG,
MGMTD_TXN_PROC_GETTREE,
MGMTD_TXN_COMMITCFG_TIMEOUT,
MGMTD_TXN_GETTREE_TIMEOUT,
MGMTD_TXN_CLEANUP
};
PREDECL_LIST(mgmt_txn_reqs);
struct mgmt_set_cfg_req {
Mgmtd__DatastoreId ds_id;
struct mgmt_ds_ctx *ds_ctx;
struct nb_cfg_change cfg_changes[MGMTD_MAX_CFG_CHANGES_IN_BATCH];
uint16_t num_cfg_changes;
bool implicit_commit;
Mgmtd__DatastoreId dst_ds_id;
struct mgmt_ds_ctx *dst_ds_ctx;
struct mgmt_setcfg_stats *setcfg_stats;
};
enum mgmt_commit_phase {
MGMTD_COMMIT_PHASE_PREPARE_CFG = 0,
MGMTD_COMMIT_PHASE_TXN_CREATE,
MGMTD_COMMIT_PHASE_SEND_CFG,
MGMTD_COMMIT_PHASE_APPLY_CFG,
MGMTD_COMMIT_PHASE_TXN_DELETE,
MGMTD_COMMIT_PHASE_MAX
};
static inline const char *mgmt_commit_phase2str(enum mgmt_commit_phase cmt_phase)
{
switch (cmt_phase) {
case MGMTD_COMMIT_PHASE_PREPARE_CFG:
return "PREP-CFG";
case MGMTD_COMMIT_PHASE_TXN_CREATE:
return "CREATE-TXN";
case MGMTD_COMMIT_PHASE_SEND_CFG:
return "SEND-CFG";
case MGMTD_COMMIT_PHASE_APPLY_CFG:
return "APPLY-CFG";
case MGMTD_COMMIT_PHASE_TXN_DELETE:
return "DELETE-TXN";
case MGMTD_COMMIT_PHASE_MAX:
return "Invalid/Unknown";
}
return "Invalid/Unknown";
}
PREDECL_LIST(mgmt_txn_batches);
struct mgmt_txn_be_cfg_batch {
struct mgmt_txn_ctx *txn;
enum mgmt_be_client_id be_id;
struct mgmt_be_client_adapter *be_adapter;
Mgmtd__YangCfgDataReq cfg_data[MGMTD_MAX_CFG_CHANGES_IN_BATCH];
Mgmtd__YangCfgDataReq *cfg_datap[MGMTD_MAX_CFG_CHANGES_IN_BATCH];
Mgmtd__YangData data[MGMTD_MAX_CFG_CHANGES_IN_BATCH];
Mgmtd__YangDataValue value[MGMTD_MAX_CFG_CHANGES_IN_BATCH];
size_t num_cfg_data;
int buf_space_left;
struct mgmt_txn_batches_item list_linkage;
};
DECLARE_LIST(mgmt_txn_batches, struct mgmt_txn_be_cfg_batch, list_linkage);
#define FOREACH_TXN_CFG_BATCH_IN_LIST(list, batch) \
frr_each_safe (mgmt_txn_batches, list, batch)
struct mgmt_commit_cfg_req {
Mgmtd__DatastoreId src_ds_id;
struct mgmt_ds_ctx *src_ds_ctx;
Mgmtd__DatastoreId dst_ds_id;
struct mgmt_ds_ctx *dst_ds_ctx;
uint32_t nb_txn_id;
uint8_t validate_only : 1;
uint8_t abort : 1;
uint8_t implicit : 1;
uint8_t rollback : 1;
/* Track commit phases */
enum mgmt_commit_phase phase;
enum mgmt_commit_phase be_phase[MGMTD_BE_CLIENT_ID_MAX];
/*
* Set of config changes to commit. This is used only
* when changes are NOT to be determined by comparing
* candidate and running DSs. This is typically used
* for downloading all relevant configs for a new backend
* client that has recently come up and connected with
* MGMTD.
*/
struct nb_config_cbs *cfg_chgs;
/*
* Details on all the Backend Clients associated with
* this commit.
*/
uint64_t clients;
/*
* List of backend batches for this commit to be validated
* and applied at the backend.
*/
struct mgmt_txn_batches_head batches[MGMTD_BE_CLIENT_ID_MAX];
/*
* The last batch added for any backend client.
*/
struct mgmt_txn_be_cfg_batch *last_be_cfg_batch[MGMTD_BE_CLIENT_ID_MAX];
struct mgmt_commit_stats *cmt_stats;
};
struct mgmt_get_data_reply {
/* Buffer space for preparing data reply */
int num_reply;
int last_batch;
Mgmtd__YangDataReply data_reply;
Mgmtd__YangData reply_data[MGMTD_MAX_NUM_DATA_REPLY_IN_BATCH];
Mgmtd__YangData *reply_datap[MGMTD_MAX_NUM_DATA_REPLY_IN_BATCH];
Mgmtd__YangDataValue reply_value[MGMTD_MAX_NUM_DATA_REPLY_IN_BATCH];
char *reply_xpathp[MGMTD_MAX_NUM_DATA_REPLY_IN_BATCH];
};
struct mgmt_get_data_req {
Mgmtd__DatastoreId ds_id;
struct nb_config *cfg_root;
char *xpaths[MGMTD_MAX_NUM_DATA_REQ_IN_BATCH];
int num_xpaths;
/*
* Buffer space for preparing reply.
* NOTE: Should only be malloc-ed on demand to reduce
* memory footprint. Freed up via mgmt_trx_req_free()
*/
struct mgmt_get_data_reply *reply;
int total_reply;
};
struct txn_req_get_tree {
char *xpath; /* xpath of tree to get */
uint64_t sent_clients; /* Bitmask of clients sent req to */
uint64_t recv_clients; /* Bitmask of clients recv reply from */
int32_t partial_error; /* an error while gather results */
uint8_t result_type; /* LYD_FORMAT for results */
uint8_t exact; /* if exact node is requested */
uint8_t simple_xpath; /* if xpath is simple */
struct lyd_node *client_results; /* result tree from clients */
};
struct mgmt_txn_req {
struct mgmt_txn_ctx *txn;
enum mgmt_txn_event req_event;
uint64_t req_id;
union {
struct mgmt_set_cfg_req *set_cfg;
struct mgmt_get_data_req *get_data;
struct txn_req_get_tree *get_tree;
struct mgmt_commit_cfg_req commit_cfg;
} req;
struct mgmt_txn_reqs_item list_linkage;
};
DECLARE_LIST(mgmt_txn_reqs, struct mgmt_txn_req, list_linkage);
#define FOREACH_TXN_REQ_IN_LIST(list, req) \
frr_each_safe (mgmt_txn_reqs, list, req)
struct mgmt_txn_ctx {
uint64_t session_id; /* One transaction per client session */
uint64_t txn_id;
enum mgmt_txn_type type;
/* struct mgmt_master *mm; */
struct event *proc_set_cfg;
struct event *proc_comm_cfg;
struct event *proc_get_cfg;
struct event *proc_get_data;
struct event *proc_get_tree;
struct event *comm_cfg_timeout;
struct event *get_tree_timeout;
struct event *clnup;
/* List of backend adapters involved in this transaction */
struct mgmt_txn_badapters_head be_adapters;
int refcount;
struct mgmt_txns_item list_linkage;
/* TODO: why do we need unique lists for each type of transaction since
* a transaction is of only 1 type?
*/
/*
* List of pending set-config requests for a given
* transaction/session. Just one list for requests
* not processed at all. There's no backend interaction
* involved.
*/
struct mgmt_txn_reqs_head set_cfg_reqs;
/*
* List of pending get-config requests for a given
* transaction/session. Just one list for requests
* not processed at all. There's no backend interaction
* involved.
*/
struct mgmt_txn_reqs_head get_cfg_reqs;
/*
* List of pending get-tree requests.
*/
struct mgmt_txn_reqs_head get_tree_reqs;
/*
* There will always be one commit-config allowed for a given
* transaction/session. No need to maintain lists for it.
*/
struct mgmt_txn_req *commit_cfg_req;
};
DECLARE_LIST(mgmt_txns, struct mgmt_txn_ctx, list_linkage);
#define FOREACH_TXN_IN_LIST(mm, txn) \
frr_each_safe (mgmt_txns, &(mm)->txn_list, (txn))
static int mgmt_txn_send_commit_cfg_reply(struct mgmt_txn_ctx *txn,
enum mgmt_result result,
const char *error_if_any);
static inline const char *mgmt_txn_commit_phase_str(struct mgmt_txn_ctx *txn)
{
if (!txn->commit_cfg_req)
return "None";
return mgmt_commit_phase2str(txn->commit_cfg_req->req.commit_cfg.phase);
}
static void mgmt_txn_lock(struct mgmt_txn_ctx *txn, const char *file, int line);
static void mgmt_txn_unlock(struct mgmt_txn_ctx **txn, const char *file,
int line);
static int mgmt_txn_send_be_txn_delete(struct mgmt_txn_ctx *txn,
struct mgmt_be_client_adapter *adapter);
static struct event_loop *mgmt_txn_tm;
static struct mgmt_master *mgmt_txn_mm;
static void mgmt_txn_register_event(struct mgmt_txn_ctx *txn,
enum mgmt_txn_event event);
static struct mgmt_txn_be_cfg_batch *
mgmt_txn_cfg_batch_alloc(struct mgmt_txn_ctx *txn, enum mgmt_be_client_id id,
struct mgmt_be_client_adapter *be_adapter)
{
struct mgmt_txn_be_cfg_batch *batch;
batch = XCALLOC(MTYPE_MGMTD_TXN_CFG_BATCH,
sizeof(struct mgmt_txn_be_cfg_batch));
assert(batch);
batch->be_id = id;
batch->txn = txn;
MGMTD_TXN_LOCK(txn);
assert(txn->commit_cfg_req);
mgmt_txn_batches_add_tail(&txn->commit_cfg_req->req.commit_cfg
.batches[id],
batch);
batch->be_adapter = be_adapter;
batch->buf_space_left = MGMTD_BE_CFGDATA_MAX_MSG_LEN;
if (be_adapter)
mgmt_be_adapter_lock(be_adapter);
txn->commit_cfg_req->req.commit_cfg.last_be_cfg_batch[id] = batch;
return batch;
}
static void mgmt_txn_cfg_batch_free(struct mgmt_txn_be_cfg_batch **batch)
{
size_t indx;
struct mgmt_commit_cfg_req *cmtcfg_req;
MGMTD_TXN_DBG(" freeing batch txn-id %" PRIu64, (*batch)->txn->txn_id);
assert((*batch)->txn && (*batch)->txn->type == MGMTD_TXN_TYPE_CONFIG);
cmtcfg_req = &(*batch)->txn->commit_cfg_req->req.commit_cfg;
mgmt_txn_batches_del(&cmtcfg_req->batches[(*batch)->be_id], *batch);
if ((*batch)->be_adapter)
mgmt_be_adapter_unlock(&(*batch)->be_adapter);
for (indx = 0; indx < (*batch)->num_cfg_data; indx++) {
if ((*batch)->data[indx].xpath) {
free((*batch)->data[indx].xpath);
(*batch)->data[indx].xpath = NULL;
}
}
MGMTD_TXN_UNLOCK(&(*batch)->txn);
XFREE(MTYPE_MGMTD_TXN_CFG_BATCH, *batch);
*batch = NULL;
}
static void mgmt_txn_cleanup_be_cfg_batches(struct mgmt_txn_ctx *txn,
enum mgmt_be_client_id id)
{
struct mgmt_txn_be_cfg_batch *batch;
struct mgmt_txn_batches_head *list;
list = &txn->commit_cfg_req->req.commit_cfg.batches[id];
FOREACH_TXN_CFG_BATCH_IN_LIST (list, batch)
mgmt_txn_cfg_batch_free(&batch);
mgmt_txn_batches_fini(list);
txn->commit_cfg_req->req.commit_cfg.last_be_cfg_batch[id] = NULL;
}
static struct mgmt_txn_req *mgmt_txn_req_alloc(struct mgmt_txn_ctx *txn,
uint64_t req_id,
enum mgmt_txn_event req_event)
{
struct mgmt_txn_req *txn_req;
enum mgmt_be_client_id id;
txn_req = XCALLOC(MTYPE_MGMTD_TXN_REQ, sizeof(struct mgmt_txn_req));
assert(txn_req);
txn_req->txn = txn;
txn_req->req_id = req_id;
txn_req->req_event = req_event;
switch (txn_req->req_event) {
case MGMTD_TXN_PROC_SETCFG:
txn_req->req.set_cfg = XCALLOC(MTYPE_MGMTD_TXN_SETCFG_REQ,
sizeof(struct mgmt_set_cfg_req));
assert(txn_req->req.set_cfg);
mgmt_txn_reqs_add_tail(&txn->set_cfg_reqs, txn_req);
MGMTD_TXN_DBG("Added a new SETCFG req-id: %" PRIu64
" txn-id: %" PRIu64 ", session-id: %" PRIu64,
txn_req->req_id, txn->txn_id, txn->session_id);
break;
case MGMTD_TXN_PROC_COMMITCFG:
txn->commit_cfg_req = txn_req;
MGMTD_TXN_DBG("Added a new COMMITCFG req-id: %" PRIu64
" txn-id: %" PRIu64 " session-id: %" PRIu64,
txn_req->req_id, txn->txn_id, txn->session_id);
FOREACH_MGMTD_BE_CLIENT_ID (id) {
txn_req->req.commit_cfg.be_phase[id] =
MGMTD_COMMIT_PHASE_PREPARE_CFG;
mgmt_txn_batches_init(
&txn_req->req.commit_cfg.batches[id]);
}
txn_req->req.commit_cfg.phase = MGMTD_COMMIT_PHASE_PREPARE_CFG;
break;
case MGMTD_TXN_PROC_GETCFG:
txn_req->req.get_data =
XCALLOC(MTYPE_MGMTD_TXN_GETDATA_REQ,
sizeof(struct mgmt_get_data_req));
assert(txn_req->req.get_data);
mgmt_txn_reqs_add_tail(&txn->get_cfg_reqs, txn_req);
MGMTD_TXN_DBG("Added a new GETCFG req-id: %" PRIu64
" txn-id: %" PRIu64 " session-id: %" PRIu64,
txn_req->req_id, txn->txn_id, txn->session_id);
break;
case MGMTD_TXN_PROC_GETTREE:
txn_req->req.get_tree = XCALLOC(MTYPE_MGMTD_TXN_GETTREE_REQ,
sizeof(struct txn_req_get_tree));
mgmt_txn_reqs_add_tail(&txn->get_tree_reqs, txn_req);
MGMTD_TXN_DBG("Added a new GETTREE req-id: %" PRIu64
" txn-id: %" PRIu64 " session-id: %" PRIu64,
txn_req->req_id, txn->txn_id, txn->session_id);
break;
case MGMTD_TXN_COMMITCFG_TIMEOUT:
case MGMTD_TXN_GETTREE_TIMEOUT:
case MGMTD_TXN_CLEANUP:
break;
}
MGMTD_TXN_LOCK(txn);
return txn_req;
}
static void mgmt_txn_req_free(struct mgmt_txn_req **txn_req)
{
int indx;
struct mgmt_txn_reqs_head *req_list = NULL;
enum mgmt_be_client_id id;
struct mgmt_be_client_adapter *adapter;
struct mgmt_commit_cfg_req *ccreq;
bool cleanup;
switch ((*txn_req)->req_event) {
case MGMTD_TXN_PROC_SETCFG:
for (indx = 0; indx < (*txn_req)->req.set_cfg->num_cfg_changes;
indx++) {
if ((*txn_req)->req.set_cfg->cfg_changes[indx].value) {
MGMTD_TXN_DBG("Freeing value for %s at %p ==> '%s'",
(*txn_req)
->req.set_cfg
->cfg_changes[indx]
.xpath,
(*txn_req)
->req.set_cfg
->cfg_changes[indx]
.value,
(*txn_req)
->req.set_cfg
->cfg_changes[indx]
.value);
free((void *)(*txn_req)
->req.set_cfg->cfg_changes[indx]
.value);
}
}
req_list = &(*txn_req)->txn->set_cfg_reqs;
MGMTD_TXN_DBG("Deleting SETCFG req-id: %" PRIu64
" txn-id: %" PRIu64,
(*txn_req)->req_id, (*txn_req)->txn->txn_id);
XFREE(MTYPE_MGMTD_TXN_SETCFG_REQ, (*txn_req)->req.set_cfg);
break;
case MGMTD_TXN_PROC_COMMITCFG:
MGMTD_TXN_DBG("Deleting COMMITCFG req-id: %" PRIu64
" txn-id: %" PRIu64,
(*txn_req)->req_id, (*txn_req)->txn->txn_id);
ccreq = &(*txn_req)->req.commit_cfg;
cleanup = (ccreq->phase >= MGMTD_COMMIT_PHASE_TXN_CREATE &&
ccreq->phase < MGMTD_COMMIT_PHASE_TXN_DELETE);
FOREACH_MGMTD_BE_CLIENT_ID (id) {
/*
* Send TXN_DELETE to cleanup state for this
* transaction on backend
*/
/*
* Get rid of the batches first so we don't end up doing
* anything more with them
*/
mgmt_txn_cleanup_be_cfg_batches((*txn_req)->txn, id);
/*
* If we were in the middle of the state machine then
* send a txn delete message
*/
adapter = mgmt_be_get_adapter_by_id(id);
if (adapter && cleanup && IS_IDBIT_SET(ccreq->clients, id))
mgmt_txn_send_be_txn_delete((*txn_req)->txn,
adapter);
}
break;
case MGMTD_TXN_PROC_GETCFG:
for (indx = 0; indx < (*txn_req)->req.get_data->num_xpaths;
indx++) {
if ((*txn_req)->req.get_data->xpaths[indx])
free((void *)(*txn_req)
->req.get_data->xpaths[indx]);
}
req_list = &(*txn_req)->txn->get_cfg_reqs;
MGMTD_TXN_DBG("Deleting GETCFG req-id: %" PRIu64
" txn-id: %" PRIu64,
(*txn_req)->req_id, (*txn_req)->txn->txn_id);
if ((*txn_req)->req.get_data->reply)
XFREE(MTYPE_MGMTD_TXN_GETDATA_REPLY,
(*txn_req)->req.get_data->reply);
if ((*txn_req)->req.get_data->cfg_root)
nb_config_free((*txn_req)->req.get_data->cfg_root);
XFREE(MTYPE_MGMTD_TXN_GETDATA_REQ, (*txn_req)->req.get_data);
break;
case MGMTD_TXN_PROC_GETTREE:
MGMTD_TXN_DBG("Deleting GETTREE req-id: %" PRIu64
" of txn-id: %" PRIu64,
(*txn_req)->req_id, (*txn_req)->txn->txn_id);
req_list = &(*txn_req)->txn->get_tree_reqs;
lyd_free_all((*txn_req)->req.get_tree->client_results);
XFREE(MTYPE_MGMTD_XPATH, (*txn_req)->req.get_tree->xpath);
XFREE(MTYPE_MGMTD_TXN_GETTREE_REQ, (*txn_req)->req.get_tree);
break;
case MGMTD_TXN_COMMITCFG_TIMEOUT:
case MGMTD_TXN_GETTREE_TIMEOUT:
case MGMTD_TXN_CLEANUP:
break;
}
if (req_list) {
mgmt_txn_reqs_del(req_list, *txn_req);
MGMTD_TXN_DBG("Removed req-id: %" PRIu64
" from request-list (left:%zu)",
(*txn_req)->req_id, mgmt_txn_reqs_count(req_list));
}
MGMTD_TXN_UNLOCK(&(*txn_req)->txn);
XFREE(MTYPE_MGMTD_TXN_REQ, (*txn_req));
*txn_req = NULL;
}
static void mgmt_txn_process_set_cfg(struct event *thread)
{
struct mgmt_txn_ctx *txn;
struct mgmt_txn_req *txn_req;
struct mgmt_ds_ctx *ds_ctx;
struct nb_config *nb_config;
char err_buf[1024];
bool error;
int num_processed = 0;
size_t left;
struct mgmt_commit_stats *cmt_stats;
int ret = 0;
txn = (struct mgmt_txn_ctx *)EVENT_ARG(thread);
assert(txn);
cmt_stats = mgmt_fe_get_session_commit_stats(txn->session_id);
MGMTD_TXN_DBG("Processing %zu SET_CONFIG requests txn-id:%" PRIu64
" session-id: %" PRIu64,
mgmt_txn_reqs_count(&txn->set_cfg_reqs), txn->txn_id,
txn->session_id);
FOREACH_TXN_REQ_IN_LIST (&txn->set_cfg_reqs, txn_req) {
assert(txn_req->req_event == MGMTD_TXN_PROC_SETCFG);
ds_ctx = txn_req->req.set_cfg->ds_ctx;
if (!ds_ctx) {
mgmt_fe_send_set_cfg_reply(txn->session_id, txn->txn_id,
txn_req->req.set_cfg->ds_id,
txn_req->req_id,
MGMTD_INTERNAL_ERROR,
"No such datastore!",
txn_req->req.set_cfg
->implicit_commit);
goto mgmt_txn_process_set_cfg_done;
}
nb_config = mgmt_ds_get_nb_config(ds_ctx);
if (!nb_config) {
mgmt_fe_send_set_cfg_reply(txn->session_id, txn->txn_id,
txn_req->req.set_cfg->ds_id,
txn_req->req_id,
MGMTD_INTERNAL_ERROR,
"Unable to retrieve DS Config Tree!",
txn_req->req.set_cfg
->implicit_commit);
goto mgmt_txn_process_set_cfg_done;
}
error = false;
nb_candidate_edit_config_changes(nb_config,
txn_req->req.set_cfg->cfg_changes,
(size_t)txn_req->req.set_cfg
->num_cfg_changes,
NULL, err_buf, sizeof(err_buf),
&error);
if (error) {
mgmt_fe_send_set_cfg_reply(txn->session_id, txn->txn_id,
txn_req->req.set_cfg->ds_id,
txn_req->req_id,
MGMTD_INTERNAL_ERROR, err_buf,
txn_req->req.set_cfg
->implicit_commit);
goto mgmt_txn_process_set_cfg_done;
}
if (txn_req->req.set_cfg->implicit_commit) {
assert(mgmt_txn_reqs_count(&txn->set_cfg_reqs) == 1);
assert(txn_req->req.set_cfg->dst_ds_ctx);
/* We expect the user to have locked the DST DS */
if (!mgmt_ds_is_locked(txn_req->req.set_cfg->dst_ds_ctx,
txn->session_id)) {
MGMTD_TXN_ERR("DS %u not locked for implicit commit txn-id: %" PRIu64
" session-id: %" PRIu64 " err: %s",
txn_req->req.set_cfg->dst_ds_id,
txn->txn_id, txn->session_id,
strerror(ret));
mgmt_fe_send_set_cfg_reply(
txn->session_id, txn->txn_id,
txn_req->req.set_cfg->ds_id,
txn_req->req_id, MGMTD_DS_LOCK_FAILED,
"running DS not locked for implicit commit",
txn_req->req.set_cfg->implicit_commit);
goto mgmt_txn_process_set_cfg_done;
}
mgmt_txn_send_commit_config_req(txn->txn_id,
txn_req->req_id,
txn_req->req.set_cfg
->ds_id,
txn_req->req.set_cfg
->ds_ctx,
txn_req->req.set_cfg
->dst_ds_id,
txn_req->req.set_cfg
->dst_ds_ctx,
false, false, true);
if (mm->perf_stats_en)
gettimeofday(&cmt_stats->last_start, NULL);
cmt_stats->commit_cnt++;
} else if (mgmt_fe_send_set_cfg_reply(txn->session_id,
txn->txn_id,
txn_req->req.set_cfg->ds_id,
txn_req->req_id,
MGMTD_SUCCESS, NULL,
false) != 0) {
MGMTD_TXN_ERR("Failed to send SET_CONFIG_REPLY txn-id %" PRIu64
" session-id: %" PRIu64,
txn->txn_id, txn->session_id);
}
mgmt_txn_process_set_cfg_done:
/*
* Note: The following will remove it from the list as well.
*/
mgmt_txn_req_free(&txn_req);
num_processed++;
if (num_processed == MGMTD_TXN_MAX_NUM_SETCFG_PROC)
break;
}
left = mgmt_txn_reqs_count(&txn->set_cfg_reqs);
if (left) {
MGMTD_TXN_DBG("Processed maximum number of Set-Config requests (%d/%d/%d). Rescheduling for rest.",
num_processed, MGMTD_TXN_MAX_NUM_SETCFG_PROC,
(int)left);
mgmt_txn_register_event(txn, MGMTD_TXN_PROC_SETCFG);
}
}
static int mgmt_txn_send_commit_cfg_reply(struct mgmt_txn_ctx *txn,
enum mgmt_result result,
const char *error_if_any)
{
bool success, create_cmt_info_rec;
if (!txn->commit_cfg_req)
return -1;
success = (result == MGMTD_SUCCESS || result == MGMTD_NO_CFG_CHANGES);
/* TODO: these replies should not be send if it's a rollback
* b/c right now that is special cased.. that special casing should be
* removed; however...
*/
if (!txn->commit_cfg_req->req.commit_cfg.implicit && txn->session_id &&
!txn->commit_cfg_req->req.commit_cfg.rollback &&
mgmt_fe_send_commit_cfg_reply(txn->session_id, txn->txn_id,
txn->commit_cfg_req->req.commit_cfg
.src_ds_id,
txn->commit_cfg_req->req.commit_cfg
.dst_ds_id,
txn->commit_cfg_req->req_id,
txn->commit_cfg_req->req.commit_cfg
.validate_only,
result, error_if_any) != 0) {
MGMTD_TXN_ERR("Failed to send COMMIT-CONFIG-REPLY txn-id: %" PRIu64
" session-id: %" PRIu64,
txn->txn_id, txn->session_id);
}
if (txn->commit_cfg_req->req.commit_cfg.implicit && txn->session_id &&
!txn->commit_cfg_req->req.commit_cfg.rollback &&
mgmt_fe_send_set_cfg_reply(txn->session_id, txn->txn_id,
txn->commit_cfg_req->req.commit_cfg
.src_ds_id,
txn->commit_cfg_req->req_id,
success ? MGMTD_SUCCESS
: MGMTD_INTERNAL_ERROR,
error_if_any, true) != 0) {
MGMTD_TXN_ERR("Failed to send SET-CONFIG-REPLY txn-id: %" PRIu64
" session-id: %" PRIu64,
txn->txn_id, txn->session_id);
}
if (success) {
/* Stop the commit-timeout timer */
/* XXX why only on success? */
EVENT_OFF(txn->comm_cfg_timeout);
create_cmt_info_rec =
(result != MGMTD_NO_CFG_CHANGES &&
!txn->commit_cfg_req->req.commit_cfg.rollback);
/*
* Successful commit: Merge Src DS into Dst DS if and only if
* this was not a validate-only or abort request.
*/
if ((txn->session_id &&
!txn->commit_cfg_req->req.commit_cfg.validate_only &&
!txn->commit_cfg_req->req.commit_cfg.abort) ||
txn->commit_cfg_req->req.commit_cfg.rollback) {
mgmt_ds_copy_dss(txn->commit_cfg_req->req.commit_cfg
.src_ds_ctx,
txn->commit_cfg_req->req.commit_cfg
.dst_ds_ctx,
create_cmt_info_rec);
}
/*
* Restore Src DS back to Dest DS only through a commit abort
* request.
*/
if (txn->session_id && txn->commit_cfg_req->req.commit_cfg.abort)
mgmt_ds_copy_dss(txn->commit_cfg_req->req.commit_cfg
.dst_ds_ctx,
txn->commit_cfg_req->req.commit_cfg
.src_ds_ctx,
false);
} else {
/*
* The commit has failied. For implicit commit requests restore
* back the contents of the candidate DS.
*/
if (txn->commit_cfg_req->req.commit_cfg.implicit)
mgmt_ds_copy_dss(txn->commit_cfg_req->req.commit_cfg
.dst_ds_ctx,
txn->commit_cfg_req->req.commit_cfg
.src_ds_ctx,
false);
}
if (txn->commit_cfg_req->req.commit_cfg.rollback) {
mgmt_ds_unlock(txn->commit_cfg_req->req.commit_cfg.src_ds_ctx);
mgmt_ds_unlock(txn->commit_cfg_req->req.commit_cfg.dst_ds_ctx);
/*
* Resume processing the rollback command.
*
* TODO: there's no good reason to special case rollback, the
* rollback boolean should be passed back to the FE client and it
* can do the right thing.
*/
mgmt_history_rollback_complete(success);
}
txn->commit_cfg_req->req.commit_cfg.cmt_stats = NULL;
mgmt_txn_req_free(&txn->commit_cfg_req);
/*
* The CONFIG Transaction should be destroyed from Frontend-adapter.
* But in case the transaction is not triggered from a front-end session
* we need to cleanup by itself.
*/
if (!txn->session_id)
mgmt_txn_register_event(txn, MGMTD_TXN_CLEANUP);
return 0;
}
static int
mgmt_try_move_commit_to_next_phase(struct mgmt_txn_ctx *txn,
struct mgmt_commit_cfg_req *cmtcfg_req)
{
enum mgmt_be_client_id id;
MGMTD_TXN_DBG("txn-id: %" PRIu64 ", Phase '%s'",
txn->txn_id, mgmt_txn_commit_phase_str(txn));
/*
* Check if all clients has moved to next phase or not.
*/
FOREACH_MGMTD_BE_CLIENT_ID (id) {
if (IS_IDBIT_SET(cmtcfg_req->clients, id) &&
cmtcfg_req->be_phase[id] == cmtcfg_req->phase) {
/*
* There's atleast once client who hasn't moved to
* next phase.
*
* TODO: Need to re-think this design for the case
* set of validators for a given YANG data item is
* different from the set of notifiers for the same.
*/
return -1;
}
}
/*
* If we are here, it means all the clients has moved to next phase.
* So we can move the whole commit to next phase.
*/
cmtcfg_req->phase++;
MGMTD_TXN_DBG("Move entire txn-id: %" PRIu64 " to phase '%s'",
txn->txn_id, mgmt_txn_commit_phase_str(txn));
mgmt_txn_register_event(txn, MGMTD_TXN_PROC_COMMITCFG);
return 0;
}
/*
* This is the real workhorse
*/
static int mgmt_txn_create_config_batches(struct mgmt_txn_req *txn_req,
struct nb_config_cbs *changes)
{
struct nb_config_cb *cb, *nxt;
struct nb_config_change *chg;
struct mgmt_txn_be_cfg_batch *batch;
char *xpath = NULL, *value = NULL;
char err_buf[1024];
enum mgmt_be_client_id id;
struct mgmt_be_client_adapter *adapter;
struct mgmt_commit_cfg_req *cmtcfg_req;
int num_chgs = 0;
int xpath_len, value_len;
uint64_t clients, chg_clients;
cmtcfg_req = &txn_req->req.commit_cfg;
RB_FOREACH_SAFE (cb, nb_config_cbs, changes, nxt) {
chg = (struct nb_config_change *)cb;
/*
* Could have directly pointed to xpath in nb_node.
* But dont want to mess with it now.
* xpath = chg->cb.nb_node->xpath;
*/
xpath = lyd_path(chg->cb.dnode, LYD_PATH_STD, NULL, 0);
if (!xpath) {
(void)mgmt_txn_send_commit_cfg_reply(
txn_req->txn, MGMTD_INTERNAL_ERROR,
"Internal error! Could not get Xpath from Ds node!");
return -1;
}
value = (char *)lyd_get_value(chg->cb.dnode);
if (!value)
value = (char *)MGMTD_BE_CONTAINER_NODE_VAL;
MGMTD_TXN_DBG("XPATH: %s, Value: '%s'", xpath,
value ? value : "NIL");
clients = mgmt_be_interested_clients(xpath, true);
chg_clients = 0;
xpath_len = strlen(xpath) + 1;
value_len = strlen(value) + 1;
FOREACH_BE_CLIENT_BITS (id, clients) {
adapter = mgmt_be_get_adapter_by_id(id);
if (!adapter)
continue;
chg_clients |= (1ull << id);
batch = cmtcfg_req->last_be_cfg_batch[id];
if (!batch ||
(batch->num_cfg_data ==
MGMTD_MAX_CFG_CHANGES_IN_BATCH) ||
(batch->buf_space_left < (xpath_len + value_len))) {
/* Allocate a new config batch */
batch = mgmt_txn_cfg_batch_alloc(txn_req->txn,
id, adapter);
}
batch->buf_space_left -= (xpath_len + value_len);
mgmt_yang_cfg_data_req_init(
&batch->cfg_data[batch->num_cfg_data]);
batch->cfg_datap[batch->num_cfg_data] =
&batch->cfg_data[batch->num_cfg_data];
/*
* On the backend, we don't really care if it's CREATE
* or MODIFY, because the existence was already checked
* on the frontend. Therefore we use SET for both.
*/
if (chg->cb.operation == NB_CB_DESTROY)
batch->cfg_data[batch->num_cfg_data].req_type =
MGMTD__CFG_DATA_REQ_TYPE__REMOVE_DATA;
else
batch->cfg_data[batch->num_cfg_data].req_type =
MGMTD__CFG_DATA_REQ_TYPE__SET_DATA;
mgmt_yang_data_init(&batch->data[batch->num_cfg_data]);
batch->cfg_data[batch->num_cfg_data].data =
&batch->data[batch->num_cfg_data];
batch->data[batch->num_cfg_data].xpath = strdup(xpath);
mgmt_yang_data_value_init(
&batch->value[batch->num_cfg_data]);
batch->data[batch->num_cfg_data].value =
&batch->value[batch->num_cfg_data];
batch->value[batch->num_cfg_data].value_case =
MGMTD__YANG_DATA_VALUE__VALUE_ENCODED_STR_VAL;
batch->value[batch->num_cfg_data].encoded_str_val =
value;
value = NULL;
MGMTD_TXN_DBG(" -- %s, batch item:%d", adapter->name,
(int)batch->num_cfg_data);
batch->num_cfg_data++;
num_chgs++;
}
if (!chg_clients) {
snprintf(err_buf, sizeof(err_buf),
"No validator module found for XPATH: '%s",
xpath);
MGMTD_TXN_ERR("***** %s", err_buf);
}
cmtcfg_req->clients |= chg_clients;
free(xpath);
}
cmtcfg_req->cmt_stats->last_batch_cnt = num_chgs;
if (!num_chgs) {
(void)mgmt_txn_send_commit_cfg_reply(txn_req->txn,
MGMTD_NO_CFG_CHANGES,
"No changes found to commit!");
return -1;
}
/* Move all BE clients to create phase */
FOREACH_MGMTD_BE_CLIENT_ID(id) {
if (IS_IDBIT_SET(cmtcfg_req->clients, id))
cmtcfg_req->be_phase[id] =
MGMTD_COMMIT_PHASE_TXN_CREATE;
}
return 0;
}
static int mgmt_txn_prepare_config(struct mgmt_txn_ctx *txn)
{
struct nb_context nb_ctx;
struct nb_config *nb_config;
struct nb_config_cbs changes;
struct nb_config_cbs *cfg_chgs = NULL;
int ret;
bool del_cfg_chgs = false;
ret = 0;
memset(&nb_ctx, 0, sizeof(nb_ctx));
memset(&changes, 0, sizeof(changes));
if (txn->commit_cfg_req->req.commit_cfg.cfg_chgs) {
cfg_chgs = txn->commit_cfg_req->req.commit_cfg.cfg_chgs;
del_cfg_chgs = true;
goto mgmt_txn_prep_config_validation_done;
}
if (txn->commit_cfg_req->req.commit_cfg.src_ds_id != MGMTD_DS_CANDIDATE) {
(void)mgmt_txn_send_commit_cfg_reply(
txn, MGMTD_INVALID_PARAM,
"Source DS cannot be any other than CANDIDATE!");
ret = -1;
goto mgmt_txn_prepare_config_done;
}
if (txn->commit_cfg_req->req.commit_cfg.dst_ds_id != MGMTD_DS_RUNNING) {
(void)mgmt_txn_send_commit_cfg_reply(
txn, MGMTD_INVALID_PARAM,
"Destination DS cannot be any other than RUNNING!");
ret = -1;
goto mgmt_txn_prepare_config_done;
}
if (!txn->commit_cfg_req->req.commit_cfg.src_ds_ctx) {
(void)mgmt_txn_send_commit_cfg_reply(txn, MGMTD_INVALID_PARAM,
"No such source datastore!");
ret = -1;
goto mgmt_txn_prepare_config_done;
}
if (!txn->commit_cfg_req->req.commit_cfg.dst_ds_ctx) {
(void)mgmt_txn_send_commit_cfg_reply(txn, MGMTD_INVALID_PARAM,
"No such destination datastore!");
ret = -1;
goto mgmt_txn_prepare_config_done;
}
if (txn->commit_cfg_req->req.commit_cfg.abort) {
/*
* This is a commit abort request. Return back success.
* That should trigger a restore of Candidate datastore to
* Running.
*/
(void)mgmt_txn_send_commit_cfg_reply(txn, MGMTD_SUCCESS, NULL);
goto mgmt_txn_prepare_config_done;
}
nb_config = mgmt_ds_get_nb_config(
txn->commit_cfg_req->req.commit_cfg.src_ds_ctx);
if (!nb_config) {
(void)mgmt_txn_send_commit_cfg_reply(
txn, MGMTD_INTERNAL_ERROR,
"Unable to retrieve Commit DS Config Tree!");
ret = -1;
goto mgmt_txn_prepare_config_done;
}
/*
* Validate YANG contents of the source DS and get the diff
* between source and destination DS contents.
*/
char err_buf[BUFSIZ] = { 0 };
ret = nb_candidate_validate_yang(nb_config, true, err_buf,
sizeof(err_buf) - 1);
if (ret != NB_OK) {
if (strncmp(err_buf, " ", strlen(err_buf)) == 0)
strlcpy(err_buf, "Validation failed", sizeof(err_buf));
(void)mgmt_txn_send_commit_cfg_reply(txn, MGMTD_INVALID_PARAM,
err_buf);
ret = -1;
goto mgmt_txn_prepare_config_done;
}
nb_config_diff(mgmt_ds_get_nb_config(txn->commit_cfg_req->req.commit_cfg
.dst_ds_ctx),
nb_config, &changes);
cfg_chgs = &changes;
del_cfg_chgs = true;
if (RB_EMPTY(nb_config_cbs, cfg_chgs)) {
/*
* This means there's no changes to commit whatsoever
* is the source of the changes in config.
*/
(void)mgmt_txn_send_commit_cfg_reply(txn, MGMTD_NO_CFG_CHANGES,
"No changes found to be committed!");
ret = -1;
goto mgmt_txn_prepare_config_done;
}
#ifdef MGMTD_LOCAL_VALIDATIONS_ENABLED
if (mm->perf_stats_en)
gettimeofday(&txn->commit_cfg_req->req.commit_cfg.cmt_stats
->validate_start,
NULL);
/*
* Perform application level validations locally on the MGMTD
* process by calling application specific validation routines
* loaded onto MGMTD process using libraries.
*/
nb_ctx.client = NB_CLIENT_MGMTD_SERVER;
nb_ctx.user = (void *)txn;
ret = nb_candidate_validate_code(&nb_ctx, nb_config, &changes, err_buf,
sizeof(err_buf) - 1);
if (ret != NB_OK) {
if (strncmp(err_buf, " ", strlen(err_buf)) == 0)
strlcpy(err_buf, "Validation failed", sizeof(err_buf));
(void)mgmt_txn_send_commit_cfg_reply(txn, MGMTD_INVALID_PARAM,
err_buf);
ret = -1;
goto mgmt_txn_prepare_config_done;
}
if (txn->commit_cfg_req->req.commit_cfg.validate_only) {
/*
* This was a validate-only COMMIT request return success.
*/
(void)mgmt_txn_send_commit_cfg_reply(txn, MGMTD_SUCCESS, NULL);
goto mgmt_txn_prepare_config_done;
}
#endif /* ifdef MGMTD_LOCAL_VALIDATIONS_ENABLED */
mgmt_txn_prep_config_validation_done:
if (mm->perf_stats_en)
gettimeofday(&txn->commit_cfg_req->req.commit_cfg.cmt_stats
->prep_cfg_start,
NULL);
/*
* Iterate over the diffs and create ordered batches of config
* commands to be validated.
*/
ret = mgmt_txn_create_config_batches(txn->commit_cfg_req, cfg_chgs);
if (ret != 0) {
ret = -1;
goto mgmt_txn_prepare_config_done;
}
/* Move to the Transaction Create Phase */
txn->commit_cfg_req->req.commit_cfg.phase =
MGMTD_COMMIT_PHASE_TXN_CREATE;
mgmt_txn_register_event(txn, MGMTD_TXN_PROC_COMMITCFG);
/*
* Start the COMMIT Timeout Timer to abort Txn if things get stuck at
* backend.
*/
mgmt_txn_register_event(txn, MGMTD_TXN_COMMITCFG_TIMEOUT);
mgmt_txn_prepare_config_done:
if (cfg_chgs && del_cfg_chgs)
nb_config_diff_del_changes(cfg_chgs);
return ret;
}
static int mgmt_txn_send_be_txn_create(struct mgmt_txn_ctx *txn)
{
enum mgmt_be_client_id id;
struct mgmt_be_client_adapter *adapter;
struct mgmt_commit_cfg_req *cmtcfg_req;
assert(txn->type == MGMTD_TXN_TYPE_CONFIG && txn->commit_cfg_req);
cmtcfg_req = &txn->commit_cfg_req->req.commit_cfg;
FOREACH_MGMTD_BE_CLIENT_ID (id) {
if (IS_IDBIT_SET(cmtcfg_req->clients, id)) {
adapter = mgmt_be_get_adapter_by_id(id);
if (mgmt_be_send_txn_req(adapter, txn->txn_id, true)) {
(void)mgmt_txn_send_commit_cfg_reply(
txn, MGMTD_INTERNAL_ERROR,
"Could not send TXN_CREATE to backend adapter");
return -1;
}
}
}
/*
* Dont move the commit to next phase yet. Wait for the TXN_REPLY to
* come back.
*/
MGMTD_TXN_DBG("txn-id: %" PRIu64 " session-id: %" PRIu64
" Phase '%s'",
txn->txn_id, txn->session_id,
mgmt_txn_commit_phase_str(txn));
return 0;
}
static int mgmt_txn_send_be_cfg_data(struct mgmt_txn_ctx *txn,
struct mgmt_be_client_adapter *adapter)
{
struct mgmt_commit_cfg_req *cmtcfg_req;
struct mgmt_txn_be_cfg_batch *batch;
struct mgmt_be_cfgreq cfg_req = { 0 };
size_t num_batches, indx;
assert(txn->type == MGMTD_TXN_TYPE_CONFIG && txn->commit_cfg_req);
cmtcfg_req = &txn->commit_cfg_req->req.commit_cfg;
assert(IS_IDBIT_SET(cmtcfg_req->clients, adapter->id));
indx = 0;
num_batches = mgmt_txn_batches_count(&cmtcfg_req->batches[adapter->id]);
FOREACH_TXN_CFG_BATCH_IN_LIST (&cmtcfg_req->batches[adapter->id],
batch) {
cfg_req.cfgdata_reqs = batch->cfg_datap;
cfg_req.num_reqs = batch->num_cfg_data;
indx++;
if (mgmt_be_send_cfgdata_req(adapter, txn->txn_id,
cfg_req.cfgdata_reqs,
cfg_req.num_reqs,
indx == num_batches)) {
(void)mgmt_txn_send_commit_cfg_reply(
txn, MGMTD_INTERNAL_ERROR,
"Internal Error! Could not send config data to backend!");
MGMTD_TXN_ERR("Could not send CFGDATA_CREATE txn-id: %" PRIu64
" to client '%s", txn->txn_id, adapter->name);
return -1;
}
cmtcfg_req->cmt_stats->last_num_cfgdata_reqs++;
}
cmtcfg_req->be_phase[adapter->id] = MGMTD_COMMIT_PHASE_SEND_CFG;
/*
* This could be the last Backend Client to send CFGDATA_CREATE_REQ to.
* Try moving the commit to next phase.
*/
mgmt_try_move_commit_to_next_phase(txn, cmtcfg_req);
return 0;
}
static int mgmt_txn_send_be_txn_delete(struct mgmt_txn_ctx *txn,
struct mgmt_be_client_adapter *adapter)
{
struct mgmt_commit_cfg_req *cmtcfg_req =
&txn->commit_cfg_req->req.commit_cfg;
assert(txn->type == MGMTD_TXN_TYPE_CONFIG);
if (IS_IDBIT_UNSET(cmtcfg_req->clients, adapter->id))
return 0;
return mgmt_be_send_txn_req(adapter, txn->txn_id, false);
}
static void mgmt_txn_cfg_commit_timedout(struct event *thread)
{
struct mgmt_txn_ctx *txn;
txn = (struct mgmt_txn_ctx *)EVENT_ARG(thread);
assert(txn);
assert(txn->type == MGMTD_TXN_TYPE_CONFIG);
if (!txn->commit_cfg_req)
return;
MGMTD_TXN_ERR("Backend timeout txn-id: %" PRIu64 " aborting commit",
txn->txn_id);
/*
* Send a COMMIT_CONFIG_REPLY with failure.
* NOTE: The transaction cleanup will be triggered from Front-end
* adapter.
*/
mgmt_txn_send_commit_cfg_reply(
txn, MGMTD_INTERNAL_ERROR,
"Operation on the backend timed-out. Aborting commit!");
}
static int txn_get_tree_data_done(struct mgmt_txn_ctx *txn,
struct mgmt_txn_req *txn_req)
{
struct txn_req_get_tree *get_tree = txn_req->req.get_tree;
uint64_t req_id = txn_req->req_id;
struct lyd_node *result;
int ret = NB_OK;
/* cancel timer and send reply onward */
EVENT_OFF(txn->get_tree_timeout);
if (!get_tree->simple_xpath && get_tree->client_results) {
/*
* We have a complex query so Filter results by the xpath query.
*/
if (yang_lyd_trim_xpath(&get_tree->client_results,
txn_req->req.get_tree->xpath))
ret = NB_ERR;
}
result = get_tree->client_results;
if (ret == NB_OK && result && get_tree->exact)
result = yang_dnode_get(result, get_tree->xpath);
if (ret == NB_OK)
ret = mgmt_fe_adapter_send_tree_data(txn->session_id,
txn->txn_id,
txn_req->req_id,
get_tree->result_type,
result,
get_tree->partial_error,
false);
/* we're done with the request */
mgmt_txn_req_free(&txn_req);
if (ret) {
MGMTD_TXN_ERR("Error sending the results of GETTREE for txn-id %" PRIu64
" req_id %" PRIu64 " to requested type %u",
txn->txn_id, req_id, get_tree->result_type);
(void)mgmt_fe_adapter_txn_error(txn->txn_id, req_id, false, ret,
"Error converting results of GETTREE");
}
return ret;
}
static void txn_get_tree_timeout(struct event *thread)
{
struct mgmt_txn_ctx *txn;
struct mgmt_txn_req *txn_req;
txn_req = (struct mgmt_txn_req *)EVENT_ARG(thread);
txn = txn_req->txn;
assert(txn);
assert(txn->type == MGMTD_TXN_TYPE_SHOW);
MGMTD_TXN_ERR("Backend timeout txn-id: %" PRIu64 " ending get-tree",
txn->txn_id);
/*
* Send a get-tree data reply.
*
* NOTE: The transaction cleanup will be triggered from Front-end
* adapter.
*/
txn_req->req.get_tree->partial_error = -ETIMEDOUT;
txn_get_tree_data_done(txn, txn_req);
}
/*
* Send CFG_APPLY_REQs to all the backend client.
*
* NOTE: This is always dispatched when all CFGDATA_CREATE_REQs
* for all backend clients has been generated. Please see
* mgmt_txn_register_event() and mgmt_txn_process_commit_cfg()
* for details.
*/
static int mgmt_txn_send_be_cfg_apply(struct mgmt_txn_ctx *txn)
{
enum mgmt_be_client_id id;
struct mgmt_be_client_adapter *adapter;
struct mgmt_commit_cfg_req *cmtcfg_req;
assert(txn->type == MGMTD_TXN_TYPE_CONFIG && txn->commit_cfg_req);
cmtcfg_req = &txn->commit_cfg_req->req.commit_cfg;
if (cmtcfg_req->validate_only) {
/*
* If this was a validate-only COMMIT request return success.
*/
(void)mgmt_txn_send_commit_cfg_reply(txn, MGMTD_SUCCESS, NULL);
return 0;
}
FOREACH_MGMTD_BE_CLIENT_ID (id) {
if (IS_IDBIT_SET(cmtcfg_req->clients, id)) {
adapter = mgmt_be_get_adapter_by_id(id);
if (!adapter)
return -1;
if (mgmt_be_send_cfgapply_req(adapter, txn->txn_id)) {
(void)mgmt_txn_send_commit_cfg_reply(
txn, MGMTD_INTERNAL_ERROR,
"Could not send CFG_APPLY_REQ to backend adapter");
return -1;
}
cmtcfg_req->cmt_stats->last_num_apply_reqs++;
UNSET_FLAG(adapter->flags,
MGMTD_BE_ADAPTER_FLAGS_CFG_SYNCED);
}
}
/*
* Dont move the commit to next phase yet. Wait for all VALIDATE_REPLIES
* to come back.
*/
return 0;
}
static void mgmt_txn_process_commit_cfg(struct event *thread)
{
struct mgmt_txn_ctx *txn;
struct mgmt_commit_cfg_req *cmtcfg_req;
txn = (struct mgmt_txn_ctx *)EVENT_ARG(thread);
assert(txn);
MGMTD_TXN_DBG("Processing COMMIT_CONFIG for txn-id: %" PRIu64
" session-id: %" PRIu64 " Phase '%s'",
txn->txn_id, txn->session_id,
mgmt_txn_commit_phase_str(txn));
assert(txn->commit_cfg_req);
cmtcfg_req = &txn->commit_cfg_req->req.commit_cfg;
switch (cmtcfg_req->phase) {
case MGMTD_COMMIT_PHASE_PREPARE_CFG:
mgmt_txn_prepare_config(txn);
break;
case MGMTD_COMMIT_PHASE_TXN_CREATE:
if (mm->perf_stats_en)
gettimeofday(&cmtcfg_req->cmt_stats->txn_create_start,
NULL);
/*
* Send TXN_CREATE_REQ to all Backend now.
*/
mgmt_txn_send_be_txn_create(txn);
break;
case MGMTD_COMMIT_PHASE_SEND_CFG:
if (mm->perf_stats_en)
gettimeofday(&cmtcfg_req->cmt_stats->send_cfg_start,
NULL);
/*
* All CFGDATA_CREATE_REQ should have been sent to
* Backend by now.
*/
#ifndef MGMTD_LOCAL_VALIDATIONS_ENABLED
MGMTD_TXN_DBG("txn-id: %" PRIu64 " session-id: %" PRIu64
" trigger sending CFG_VALIDATE_REQ to all backend clients",
txn->txn_id, txn->session_id);
#else /* ifndef MGMTD_LOCAL_VALIDATIONS_ENABLED */
MGMTD_TXN_DBG("txn-id: %" PRIu64 " session-id: %" PRIu64
" trigger sending CFG_APPLY_REQ to all backend clients",
txn->txn_id, txn->session_id);
#endif /* ifndef MGMTD_LOCAL_VALIDATIONS_ENABLED */
break;
case MGMTD_COMMIT_PHASE_APPLY_CFG:
if (mm->perf_stats_en)
gettimeofday(&cmtcfg_req->cmt_stats->apply_cfg_start,
NULL);
/*
* We should have received successful CFG_VALIDATE_REPLY from
* all concerned Backend Clients by now. Send out the
* CFG_APPLY_REQs now.
*/
mgmt_txn_send_be_cfg_apply(txn);
break;
case MGMTD_COMMIT_PHASE_TXN_DELETE:
if (mm->perf_stats_en)
gettimeofday(&cmtcfg_req->cmt_stats->txn_del_start,
NULL);
/*
* We would have sent TXN_DELETE_REQ to all backend by now.
* Send a successful CONFIG_COMMIT_REPLY back to front-end.
* NOTE: This should also trigger DS merge/unlock and Txn
* cleanup. Please see mgmt_fe_send_commit_cfg_reply() for
* more details.
*/
EVENT_OFF(txn->comm_cfg_timeout);
mgmt_txn_send_commit_cfg_reply(txn, MGMTD_SUCCESS, NULL);
break;
case MGMTD_COMMIT_PHASE_MAX:
break;
}
MGMTD_TXN_DBG("txn-id:%" PRIu64 " session-id: %" PRIu64
" phase updated to '%s'",
txn->txn_id, txn->session_id,
mgmt_txn_commit_phase_str(txn));
}
static void mgmt_init_get_data_reply(struct mgmt_get_data_reply *get_reply)
{
size_t indx;
for (indx = 0; indx < array_size(get_reply->reply_data); indx++)
get_reply->reply_datap[indx] = &get_reply->reply_data[indx];
}
static void mgmt_reset_get_data_reply(struct mgmt_get_data_reply *get_reply)
{
int indx;
for (indx = 0; indx < get_reply->num_reply; indx++) {
if (get_reply->reply_xpathp[indx]) {
free(get_reply->reply_xpathp[indx]);
get_reply->reply_xpathp[indx] = 0;
}
if (get_reply->reply_data[indx].xpath) {
zlog_debug("%s free xpath %p", __func__,
get_reply->reply_data[indx].xpath);
free(get_reply->reply_data[indx].xpath);
get_reply->reply_data[indx].xpath = 0;
}
}
get_reply->num_reply = 0;
memset(&get_reply->data_reply, 0, sizeof(get_reply->data_reply));
memset(&get_reply->reply_data, 0, sizeof(get_reply->reply_data));
memset(&get_reply->reply_datap, 0, sizeof(get_reply->reply_datap));
memset(&get_reply->reply_value, 0, sizeof(get_reply->reply_value));
mgmt_init_get_data_reply(get_reply);
}
static void mgmt_reset_get_data_reply_buf(struct mgmt_get_data_req *get_data)
{
if (get_data->reply)
mgmt_reset_get_data_reply(get_data->reply);
}
static void mgmt_txn_send_getcfg_reply_data(struct mgmt_txn_req *txn_req,
struct mgmt_get_data_req *get_req)
{
struct mgmt_get_data_reply *get_reply;
Mgmtd__YangDataReply *data_reply;
get_reply = get_req->reply;
if (!get_reply)
return;
data_reply = &get_reply->data_reply;
mgmt_yang_data_reply_init(data_reply);
data_reply->n_data = get_reply->num_reply;
data_reply->data = get_reply->reply_datap;
data_reply->next_indx = (!get_reply->last_batch ? get_req->total_reply
: -1);
MGMTD_TXN_DBG("Sending %zu Get-Config/Data replies next-index:%" PRId64,
data_reply->n_data, data_reply->next_indx);
switch (txn_req->req_event) {
case MGMTD_TXN_PROC_GETCFG:
if (mgmt_fe_send_get_reply(txn_req->txn->session_id,
txn_req->txn->txn_id, get_req->ds_id,
txn_req->req_id, MGMTD_SUCCESS,
data_reply, NULL) != 0) {
MGMTD_TXN_ERR("Failed to send GET-CONFIG-REPLY txn-id: %" PRIu64
" session-id: %" PRIu64
" req-id: %" PRIu64,
txn_req->txn->txn_id,
txn_req->txn->session_id, txn_req->req_id);
}
break;
case MGMTD_TXN_PROC_SETCFG:
case MGMTD_TXN_PROC_COMMITCFG:
case MGMTD_TXN_PROC_GETTREE:
case MGMTD_TXN_GETTREE_TIMEOUT:
case MGMTD_TXN_COMMITCFG_TIMEOUT:
case MGMTD_TXN_CLEANUP:
MGMTD_TXN_ERR("Invalid Txn-Req-Event %u", txn_req->req_event);
break;
}
/*
* Reset reply buffer for next reply.
*/
mgmt_reset_get_data_reply_buf(get_req);
}
static void txn_iter_get_config_data_cb(const char *xpath, struct lyd_node *node,
struct nb_node *nb_node, void *ctx)
{
struct mgmt_txn_req *txn_req;
struct mgmt_get_data_req *get_req;
struct mgmt_get_data_reply *get_reply;
Mgmtd__YangData *data;
Mgmtd__YangDataValue *data_value;
txn_req = (struct mgmt_txn_req *)ctx;
if (!txn_req)
return;
if (!(node->schema->nodetype & LYD_NODE_TERM))
return;
assert(txn_req->req_event == MGMTD_TXN_PROC_GETCFG);
get_req = txn_req->req.get_data;
assert(get_req);
get_reply = get_req->reply;
data = &get_reply->reply_data[get_reply->num_reply];
data_value = &get_reply->reply_value[get_reply->num_reply];
mgmt_yang_data_init(data);
data->xpath = strdup(xpath);
mgmt_yang_data_value_init(data_value);
data_value->value_case = MGMTD__YANG_DATA_VALUE__VALUE_ENCODED_STR_VAL;
data_value->encoded_str_val = (char *)lyd_get_value(node);
data->value = data_value;
get_reply->num_reply++;
get_req->total_reply++;
MGMTD_TXN_DBG(" [%d] XPATH: '%s', Value: '%s'", get_req->total_reply,
data->xpath, data_value->encoded_str_val);
if (get_reply->num_reply == MGMTD_MAX_NUM_DATA_REPLY_IN_BATCH)
mgmt_txn_send_getcfg_reply_data(txn_req, get_req);
}
static int mgmt_txn_get_config(struct mgmt_txn_ctx *txn,
struct mgmt_txn_req *txn_req,
struct nb_config *root)
{
int indx;
struct mgmt_get_data_req *get_data;
struct mgmt_get_data_reply *get_reply;
get_data = txn_req->req.get_data;
if (!get_data->reply) {
get_data->reply = XCALLOC(MTYPE_MGMTD_TXN_GETDATA_REPLY,
sizeof(struct mgmt_get_data_reply));
if (!get_data->reply) {
mgmt_fe_send_get_reply(
txn->session_id, txn->txn_id, get_data->ds_id,
txn_req->req_id, MGMTD_INTERNAL_ERROR, NULL,
"Internal error: Unable to allocate reply buffers!");
goto mgmt_txn_get_config_failed;
}
}
/*
* Read data contents from the DS and respond back directly.
* No need to go to backend for getting data.
*/
get_reply = get_data->reply;
for (indx = 0; indx < get_data->num_xpaths; indx++) {
MGMTD_TXN_DBG("Trying to get all data under '%s'",
get_data->xpaths[indx]);
mgmt_init_get_data_reply(get_reply);
/*
* mgmt_ds_iter_data works on path prefixes, but the user may
* want to also use an xpath regexp we need to add this
* functionality.
*/
if (mgmt_ds_iter_data(get_data->ds_id, root,
get_data->xpaths[indx],
txn_iter_get_config_data_cb,
(void *)txn_req) == -1) {
MGMTD_TXN_DBG("Invalid Xpath '%s",
get_data->xpaths[indx]);
mgmt_fe_send_get_reply(txn->session_id, txn->txn_id,
get_data->ds_id, txn_req->req_id,
MGMTD_INTERNAL_ERROR, NULL,
"Invalid xpath");
goto mgmt_txn_get_config_failed;
}
MGMTD_TXN_DBG("Got %d remaining data-replies for xpath '%s'",
get_reply->num_reply, get_data->xpaths[indx]);
get_reply->last_batch = true;
mgmt_txn_send_getcfg_reply_data(txn_req, get_data);
}
mgmt_txn_get_config_failed:
/*
* Delete the txn request. It will also remove it from request
* list.
*/
mgmt_txn_req_free(&txn_req);
return 0;
}
static void mgmt_txn_process_get_cfg(struct event *thread)
{
struct mgmt_txn_ctx *txn;
struct mgmt_txn_req *txn_req;
struct nb_config *cfg_root;
int num_processed = 0;
bool error;
txn = (struct mgmt_txn_ctx *)EVENT_ARG(thread);
assert(txn);
MGMTD_TXN_DBG("Processing %zu GET_CONFIG requests txn-id: %" PRIu64
" session-id: %" PRIu64,
mgmt_txn_reqs_count(&txn->get_cfg_reqs), txn->txn_id,
txn->session_id);
FOREACH_TXN_REQ_IN_LIST (&txn->get_cfg_reqs, txn_req) {
error = false;
assert(txn_req->req_event == MGMTD_TXN_PROC_GETCFG);
cfg_root = txn_req->req.get_data->cfg_root;
assert(cfg_root);
if (mgmt_txn_get_config(txn, txn_req, cfg_root) != 0) {
MGMTD_TXN_ERR("Unable to retrieve config from DS %d txn-id: %" PRIu64
" session-id: %" PRIu64
" req-id: %" PRIu64,
txn_req->req.get_data->ds_id, txn->txn_id,
txn->session_id, txn_req->req_id);
error = true;
}
if (error) {
/*
* Delete the txn request.
* Note: The following will remove it from the list
* as well.
*/
mgmt_txn_req_free(&txn_req);
}
/*
* Else the transaction would have been already deleted or
* moved to corresponding pending list. No need to delete it.
*/
num_processed++;
if (num_processed == MGMTD_TXN_MAX_NUM_GETCFG_PROC)
break;
}
if (mgmt_txn_reqs_count(&txn->get_cfg_reqs)) {
MGMTD_TXN_DBG("Processed maximum number of Get-Config requests (%d/%d). Rescheduling for rest.",
num_processed, MGMTD_TXN_MAX_NUM_GETCFG_PROC);
mgmt_txn_register_event(txn, MGMTD_TXN_PROC_GETCFG);
}
}
static struct mgmt_txn_ctx *
mgmt_fe_find_txn_by_session_id(struct mgmt_master *cm, uint64_t session_id,
enum mgmt_txn_type type)
{
struct mgmt_txn_ctx *txn;
FOREACH_TXN_IN_LIST (cm, txn) {
if (txn->session_id == session_id && txn->type == type)
return txn;
}
return NULL;
}
static struct mgmt_txn_ctx *mgmt_txn_create_new(uint64_t session_id,
enum mgmt_txn_type type)
{
struct mgmt_txn_ctx *txn = NULL;
/*
* For 'CONFIG' transaction check if one is already created
* or not. TODO: figure out what code counts on this and fix it.
*/
if (type == MGMTD_TXN_TYPE_CONFIG && mgmt_txn_mm->cfg_txn) {
if (mgmt_config_txn_in_progress() == session_id)
txn = mgmt_txn_mm->cfg_txn;
goto mgmt_create_txn_done;
}
txn = mgmt_fe_find_txn_by_session_id(mgmt_txn_mm, session_id, type);
if (!txn) {
txn = XCALLOC(MTYPE_MGMTD_TXN, sizeof(struct mgmt_txn_ctx));
assert(txn);
txn->session_id = session_id;
txn->type = type;
mgmt_txns_add_tail(&mgmt_txn_mm->txn_list, txn);
/* TODO: why do we need N lists for one transaction */
mgmt_txn_reqs_init(&txn->set_cfg_reqs);
mgmt_txn_reqs_init(&txn->get_cfg_reqs);
mgmt_txn_reqs_init(&txn->get_tree_reqs);
txn->commit_cfg_req = NULL;
txn->refcount = 0;
if (!mgmt_txn_mm->next_txn_id)
mgmt_txn_mm->next_txn_id++;
txn->txn_id = mgmt_txn_mm->next_txn_id++;
hash_get(mgmt_txn_mm->txn_hash, txn, hash_alloc_intern);
MGMTD_TXN_DBG("Added new '%s' txn-id: %" PRIu64,
mgmt_txn_type2str(type), txn->txn_id);
if (type == MGMTD_TXN_TYPE_CONFIG)
mgmt_txn_mm->cfg_txn = txn;
MGMTD_TXN_LOCK(txn);
}
mgmt_create_txn_done:
return txn;
}
static void mgmt_txn_delete(struct mgmt_txn_ctx **txn)
{
MGMTD_TXN_UNLOCK(txn);
}
static unsigned int mgmt_txn_hash_key(const void *data)
{
const struct mgmt_txn_ctx *txn = data;
return jhash2((uint32_t *)&txn->txn_id,
sizeof(txn->txn_id) / sizeof(uint32_t), 0);
}
static bool mgmt_txn_hash_cmp(const void *d1, const void *d2)
{
const struct mgmt_txn_ctx *txn1 = d1;
const struct mgmt_txn_ctx *txn2 = d2;
return (txn1->txn_id == txn2->txn_id);
}
static void mgmt_txn_hash_free(void *data)
{
struct mgmt_txn_ctx *txn = data;
mgmt_txn_delete(&txn);
}
static void mgmt_txn_hash_init(void)
{
if (!mgmt_txn_mm || mgmt_txn_mm->txn_hash)
return;
mgmt_txn_mm->txn_hash = hash_create(mgmt_txn_hash_key, mgmt_txn_hash_cmp,
"MGMT Transactions");
}
static void mgmt_txn_hash_destroy(void)
{
if (!mgmt_txn_mm || !mgmt_txn_mm->txn_hash)
return;
hash_clean(mgmt_txn_mm->txn_hash, mgmt_txn_hash_free);
hash_free(mgmt_txn_mm->txn_hash);
mgmt_txn_mm->txn_hash = NULL;
}
static inline struct mgmt_txn_ctx *mgmt_txn_id2ctx(uint64_t txn_id)
{
struct mgmt_txn_ctx key = { 0 };
struct mgmt_txn_ctx *txn;
if (!mgmt_txn_mm || !mgmt_txn_mm->txn_hash)
return NULL;
key.txn_id = txn_id;
txn = hash_lookup(mgmt_txn_mm->txn_hash, &key);
return txn;
}
uint64_t mgmt_txn_get_session_id(uint64_t txn_id)
{
struct mgmt_txn_ctx *txn = mgmt_txn_id2ctx(txn_id);
return txn ? txn->session_id : MGMTD_SESSION_ID_NONE;
}
static void mgmt_txn_lock(struct mgmt_txn_ctx *txn, const char *file, int line)
{
txn->refcount++;
MGMTD_TXN_DBG("%s:%d --> Lock %s txn-id: %" PRIu64 " refcnt: %d", file,
line, mgmt_txn_type2str(txn->type), txn->txn_id,
txn->refcount);
}
static void mgmt_txn_unlock(struct mgmt_txn_ctx **txn, const char *file,
int line)
{
assert(*txn && (*txn)->refcount);
(*txn)->refcount--;
MGMTD_TXN_DBG("%s:%d --> Unlock %s txn-id: %" PRIu64 " refcnt: %d",
file, line, mgmt_txn_type2str((*txn)->type),
(*txn)->txn_id, (*txn)->refcount);
if (!(*txn)->refcount) {
if ((*txn)->type == MGMTD_TXN_TYPE_CONFIG)
if (mgmt_txn_mm->cfg_txn == *txn)
mgmt_txn_mm->cfg_txn = NULL;
EVENT_OFF((*txn)->proc_get_cfg);
EVENT_OFF((*txn)->proc_get_data);
EVENT_OFF((*txn)->proc_comm_cfg);
EVENT_OFF((*txn)->comm_cfg_timeout);
EVENT_OFF((*txn)->get_tree_timeout);
hash_release(mgmt_txn_mm->txn_hash, *txn);
mgmt_txns_del(&mgmt_txn_mm->txn_list, *txn);
MGMTD_TXN_DBG("Deleted %s txn-id: %" PRIu64
" session-id: %" PRIu64,
mgmt_txn_type2str((*txn)->type), (*txn)->txn_id,
(*txn)->session_id);
XFREE(MTYPE_MGMTD_TXN, *txn);
}
*txn = NULL;
}
static void mgmt_txn_cleanup_txn(struct mgmt_txn_ctx **txn)
{
/* TODO: Any other cleanup applicable */
mgmt_txn_delete(txn);
}
static void mgmt_txn_cleanup_all_txns(void)
{
struct mgmt_txn_ctx *txn;
if (!mgmt_txn_mm || !mgmt_txn_mm->txn_hash)
return;
FOREACH_TXN_IN_LIST (mgmt_txn_mm, txn)
mgmt_txn_cleanup_txn(&txn);
}
static void mgmt_txn_cleanup(struct event *thread)
{
struct mgmt_txn_ctx *txn;
txn = (struct mgmt_txn_ctx *)EVENT_ARG(thread);
assert(txn);
mgmt_txn_cleanup_txn(&txn);
}
static void mgmt_txn_register_event(struct mgmt_txn_ctx *txn,
enum mgmt_txn_event event)
{
struct timeval tv = { .tv_sec = 0,
.tv_usec = MGMTD_TXN_PROC_DELAY_USEC };
assert(mgmt_txn_mm && mgmt_txn_tm);
switch (event) {
case MGMTD_TXN_PROC_SETCFG:
event_add_timer_tv(mgmt_txn_tm, mgmt_txn_process_set_cfg, txn,
&tv, &txn->proc_set_cfg);
break;
case MGMTD_TXN_PROC_COMMITCFG:
event_add_timer_tv(mgmt_txn_tm, mgmt_txn_process_commit_cfg,
txn, &tv, &txn->proc_comm_cfg);
break;
case MGMTD_TXN_PROC_GETCFG:
event_add_timer_tv(mgmt_txn_tm, mgmt_txn_process_get_cfg, txn,
&tv, &txn->proc_get_cfg);
break;
case MGMTD_TXN_COMMITCFG_TIMEOUT:
event_add_timer(mgmt_txn_tm, mgmt_txn_cfg_commit_timedout, txn,
MGMTD_TXN_CFG_COMMIT_MAX_DELAY_SEC,
&txn->comm_cfg_timeout);
break;
case MGMTD_TXN_GETTREE_TIMEOUT:
event_add_timer(mgmt_txn_tm, txn_get_tree_timeout, txn,
MGMTD_TXN_GET_TREE_MAX_DELAY_SEC,
&txn->get_tree_timeout);
break;
case MGMTD_TXN_CLEANUP:
tv.tv_usec = MGMTD_TXN_CLEANUP_DELAY_USEC;
event_add_timer_tv(mgmt_txn_tm, mgmt_txn_cleanup, txn, &tv,
&txn->clnup);
break;
case MGMTD_TXN_PROC_GETTREE:
assert(!"code bug do not register this event");
break;
}
}
int mgmt_txn_init(struct mgmt_master *mm, struct event_loop *tm)
{
if (mgmt_txn_mm || mgmt_txn_tm)
assert(!"MGMTD TXN: Call txn_init() only once");
mgmt_txn_mm = mm;
mgmt_txn_tm = tm;
mgmt_txns_init(&mm->txn_list);
mgmt_txn_hash_init();
assert(!mm->cfg_txn);
mm->cfg_txn = NULL;
return 0;
}
void mgmt_txn_destroy(void)
{
mgmt_txn_cleanup_all_txns();
mgmt_txn_hash_destroy();
}
uint64_t mgmt_config_txn_in_progress(void)
{
if (mgmt_txn_mm && mgmt_txn_mm->cfg_txn)
return mgmt_txn_mm->cfg_txn->session_id;
return MGMTD_SESSION_ID_NONE;
}
uint64_t mgmt_create_txn(uint64_t session_id, enum mgmt_txn_type type)
{
struct mgmt_txn_ctx *txn;
txn = mgmt_txn_create_new(session_id, type);
return txn ? txn->txn_id : MGMTD_TXN_ID_NONE;
}
void mgmt_destroy_txn(uint64_t *txn_id)
{
struct mgmt_txn_ctx *txn;
txn = mgmt_txn_id2ctx(*txn_id);
if (!txn)
return;
mgmt_txn_delete(&txn);
*txn_id = MGMTD_TXN_ID_NONE;
}
int mgmt_txn_send_set_config_req(uint64_t txn_id, uint64_t req_id,
Mgmtd__DatastoreId ds_id,
struct mgmt_ds_ctx *ds_ctx,
Mgmtd__YangCfgDataReq **cfg_req,
size_t num_req, bool implicit_commit,
Mgmtd__DatastoreId dst_ds_id,
struct mgmt_ds_ctx *dst_ds_ctx)
{
struct mgmt_txn_ctx *txn;
struct mgmt_txn_req *txn_req;
size_t indx;
uint16_t *num_chgs;
struct nb_cfg_change *cfg_chg;
struct nb_node *node;
txn = mgmt_txn_id2ctx(txn_id);
if (!txn)
return -1;
if (implicit_commit && mgmt_txn_reqs_count(&txn->set_cfg_reqs)) {
MGMTD_TXN_ERR(
"For implicit commit config only one SETCFG-REQ can be allowed!");
return -1;
}
txn_req = mgmt_txn_req_alloc(txn, req_id, MGMTD_TXN_PROC_SETCFG);
txn_req->req.set_cfg->ds_id = ds_id;
txn_req->req.set_cfg->ds_ctx = ds_ctx;
num_chgs = &txn_req->req.set_cfg->num_cfg_changes;
for (indx = 0; indx < num_req; indx++) {
cfg_chg = &txn_req->req.set_cfg->cfg_changes[*num_chgs];
switch (cfg_req[indx]->req_type) {
case MGMTD__CFG_DATA_REQ_TYPE__DELETE_DATA:
cfg_chg->operation = NB_OP_DELETE;
break;
case MGMTD__CFG_DATA_REQ_TYPE__REMOVE_DATA:
cfg_chg->operation = NB_OP_DESTROY;
break;
case MGMTD__CFG_DATA_REQ_TYPE__SET_DATA:
/*
* For backward compatibility, we need to allow creating
* *new* list keys with SET_DATA operation. NB_OP_MODIFY
* is not allowed for keys, so use NB_OP_CREATE_EXCL.
*/
node = nb_node_find(cfg_req[indx]->data->xpath);
if (node && lysc_is_key(node->snode))
cfg_chg->operation = NB_OP_CREATE_EXCL;
else
cfg_chg->operation = NB_OP_MODIFY;
break;
case MGMTD__CFG_DATA_REQ_TYPE__CREATE_DATA:
cfg_chg->operation = NB_OP_CREATE_EXCL;
break;
case MGMTD__CFG_DATA_REQ_TYPE__REPLACE_DATA:
cfg_chg->operation = NB_OP_REPLACE;
break;
case MGMTD__CFG_DATA_REQ_TYPE__REQ_TYPE_NONE:
case _MGMTD__CFG_DATA_REQ_TYPE_IS_INT_SIZE:
default:
continue;
}
MGMTD_TXN_DBG("XPath: '%s', Value: '%s'",
cfg_req[indx]->data->xpath,
(cfg_req[indx]->data->value &&
cfg_req[indx]->data->value->encoded_str_val
? cfg_req[indx]->data->value->encoded_str_val
: "NULL"));
strlcpy(cfg_chg->xpath, cfg_req[indx]->data->xpath,
sizeof(cfg_chg->xpath));
cfg_chg->value =
(cfg_req[indx]->data->value &&
cfg_req[indx]->data->value->encoded_str_val
? strdup(cfg_req[indx]
->data->value->encoded_str_val)
: NULL);
if (cfg_chg->value)
MGMTD_TXN_DBG("Allocated value at %p ==> '%s'",
cfg_chg->value, cfg_chg->value);
(*num_chgs)++;
}
txn_req->req.set_cfg->implicit_commit = implicit_commit;
txn_req->req.set_cfg->dst_ds_id = dst_ds_id;
txn_req->req.set_cfg->dst_ds_ctx = dst_ds_ctx;
txn_req->req.set_cfg->setcfg_stats =
mgmt_fe_get_session_setcfg_stats(txn->session_id);
mgmt_txn_register_event(txn, MGMTD_TXN_PROC_SETCFG);
return 0;
}
int mgmt_txn_send_commit_config_req(uint64_t txn_id, uint64_t req_id,
Mgmtd__DatastoreId src_ds_id,
struct mgmt_ds_ctx *src_ds_ctx,
Mgmtd__DatastoreId dst_ds_id,
struct mgmt_ds_ctx *dst_ds_ctx,
bool validate_only, bool abort,
bool implicit)
{
struct mgmt_txn_ctx *txn;
struct mgmt_txn_req *txn_req;
txn = mgmt_txn_id2ctx(txn_id);
if (!txn)
return -1;
if (txn->commit_cfg_req) {
MGMTD_TXN_ERR("Commit already in-progress txn-id: %" PRIu64
" session-id: %" PRIu64 ". Cannot start another",
txn->txn_id, txn->session_id);
return -1;
}
txn_req = mgmt_txn_req_alloc(txn, req_id, MGMTD_TXN_PROC_COMMITCFG);
txn_req->req.commit_cfg.src_ds_id = src_ds_id;
txn_req->req.commit_cfg.src_ds_ctx = src_ds_ctx;
txn_req->req.commit_cfg.dst_ds_id = dst_ds_id;
txn_req->req.commit_cfg.dst_ds_ctx = dst_ds_ctx;
txn_req->req.commit_cfg.validate_only = validate_only;
txn_req->req.commit_cfg.abort = abort;
txn_req->req.commit_cfg.implicit = implicit;
txn_req->req.commit_cfg.cmt_stats =
mgmt_fe_get_session_commit_stats(txn->session_id);
/*
* Trigger a COMMIT-CONFIG process.
*/
mgmt_txn_register_event(txn, MGMTD_TXN_PROC_COMMITCFG);
return 0;
}
int mgmt_txn_notify_be_adapter_conn(struct mgmt_be_client_adapter *adapter,
bool connect)
{
struct mgmt_txn_ctx *txn;
struct mgmt_txn_req *txn_req;
struct mgmt_commit_cfg_req *cmtcfg_req;
static struct mgmt_commit_stats dummy_stats;
struct nb_config_cbs *adapter_cfgs = NULL;
memset(&dummy_stats, 0, sizeof(dummy_stats));
if (connect) {
/* Get config for this single backend client */
mgmt_be_get_adapter_config(adapter, &adapter_cfgs);
if (!adapter_cfgs || RB_EMPTY(nb_config_cbs, adapter_cfgs)) {
SET_FLAG(adapter->flags,
MGMTD_BE_ADAPTER_FLAGS_CFG_SYNCED);
return 0;
}
/*
* Create a CONFIG transaction to push the config changes
* provided to the backend client.
*/
txn = mgmt_txn_create_new(0, MGMTD_TXN_TYPE_CONFIG);
if (!txn) {
MGMTD_TXN_ERR("Failed to create CONFIG Transaction for downloading CONFIGs for client '%s'",
adapter->name);
return -1;
}
MGMTD_TXN_DBG("Created initial txn-id: %" PRIu64
" for BE client '%s'",
txn->txn_id, adapter->name);
/*
* Set the changeset for transaction to commit and trigger the
* commit request.
*/
txn_req = mgmt_txn_req_alloc(txn, 0, MGMTD_TXN_PROC_COMMITCFG);
txn_req->req.commit_cfg.src_ds_id = MGMTD_DS_NONE;
txn_req->req.commit_cfg.src_ds_ctx = 0;
txn_req->req.commit_cfg.dst_ds_id = MGMTD_DS_NONE;
txn_req->req.commit_cfg.dst_ds_ctx = 0;
txn_req->req.commit_cfg.validate_only = false;
txn_req->req.commit_cfg.abort = false;
txn_req->req.commit_cfg.cmt_stats = &dummy_stats;
txn_req->req.commit_cfg.cfg_chgs = adapter_cfgs;
/*
* Trigger a COMMIT-CONFIG process.
*/
mgmt_txn_register_event(txn, MGMTD_TXN_PROC_COMMITCFG);
} else {
/*
* Check if any transaction is currently on-going that
* involves this backend client. If so, report the transaction
* has failed.
*/
FOREACH_TXN_IN_LIST (mgmt_txn_mm, txn) {
/* TODO: update with operational state when that is
* completed */
if (txn->type == MGMTD_TXN_TYPE_CONFIG) {
cmtcfg_req = txn->commit_cfg_req
? &txn->commit_cfg_req->req
.commit_cfg
: NULL;
if (cmtcfg_req && IS_IDBIT_SET(cmtcfg_req->clients,
adapter->id)) {
mgmt_txn_send_commit_cfg_reply(
txn, MGMTD_INTERNAL_ERROR,
"Backend daemon disconnected while processing commit!");
}
}
}
}
return 0;
}
int mgmt_txn_notify_be_txn_reply(uint64_t txn_id, bool create, bool success,
struct mgmt_be_client_adapter *adapter)
{
struct mgmt_txn_ctx *txn;
struct mgmt_commit_cfg_req *cmtcfg_req = NULL;
txn = mgmt_txn_id2ctx(txn_id);
if (!txn || txn->type != MGMTD_TXN_TYPE_CONFIG)
return -1;
if (!create && !txn->commit_cfg_req)
return 0;
assert(txn->commit_cfg_req);
cmtcfg_req = &txn->commit_cfg_req->req.commit_cfg;
if (create) {
if (success) {
/*
* Done with TXN_CREATE. Move the backend client to
* next phase.
*/
assert(cmtcfg_req->phase ==
MGMTD_COMMIT_PHASE_TXN_CREATE);
/*
* Send CFGDATA_CREATE-REQs to the backend immediately.
*/
mgmt_txn_send_be_cfg_data(txn, adapter);
} else {
mgmt_txn_send_commit_cfg_reply(
txn, MGMTD_INTERNAL_ERROR,
"Internal error! Failed to initiate transaction at backend!");
}
}
return 0;
}
int mgmt_txn_notify_be_cfgdata_reply(uint64_t txn_id, bool success,
char *error_if_any,
struct mgmt_be_client_adapter *adapter)
{
struct mgmt_txn_ctx *txn;
struct mgmt_commit_cfg_req *cmtcfg_req;
txn = mgmt_txn_id2ctx(txn_id);
if (!txn || txn->type != MGMTD_TXN_TYPE_CONFIG)
return -1;
if (!txn->commit_cfg_req)
return -1;
cmtcfg_req = &txn->commit_cfg_req->req.commit_cfg;
if (!success) {
MGMTD_TXN_ERR("CFGDATA_CREATE_REQ sent to '%s' failed txn-id: %" PRIu64
" err: %s", adapter->name, txn->txn_id,
error_if_any ? error_if_any : "None");
mgmt_txn_send_commit_cfg_reply(
txn, MGMTD_INTERNAL_ERROR,
error_if_any
? error_if_any
: "Internal error! Failed to download config data to backend!");
return 0;
}
MGMTD_TXN_DBG("CFGDATA_CREATE_REQ sent to '%s' was successful txn-id: %" PRIu64
" err: %s", adapter->name, txn->txn_id,
error_if_any ? error_if_any : "None");
cmtcfg_req->be_phase[adapter->id] = MGMTD_COMMIT_PHASE_APPLY_CFG;
mgmt_try_move_commit_to_next_phase(txn, cmtcfg_req);
return 0;
}
int mgmt_txn_notify_be_cfg_apply_reply(uint64_t txn_id, bool success,
char *error_if_any,
struct mgmt_be_client_adapter *adapter)
{
struct mgmt_txn_ctx *txn;
struct mgmt_commit_cfg_req *cmtcfg_req = NULL;
txn = mgmt_txn_id2ctx(txn_id);
if (!txn || txn->type != MGMTD_TXN_TYPE_CONFIG || !txn->commit_cfg_req)
return -1;
cmtcfg_req = &txn->commit_cfg_req->req.commit_cfg;
if (!success) {
MGMTD_TXN_ERR("CFGDATA_APPLY_REQ sent to '%s' failed txn-id: %" PRIu64
" err: %s",
adapter->name, txn->txn_id,
error_if_any ? error_if_any : "None");
mgmt_txn_send_commit_cfg_reply(
txn, MGMTD_INTERNAL_ERROR,
error_if_any
? error_if_any
: "Internal error! Failed to apply config data on backend!");
return 0;
}
cmtcfg_req->be_phase[adapter->id] = MGMTD_COMMIT_PHASE_TXN_DELETE;
/*
* All configuration for the specific backend has been applied.
* Send TXN-DELETE to wrap up the transaction for this backend.
*/
SET_FLAG(adapter->flags, MGMTD_BE_ADAPTER_FLAGS_CFG_SYNCED);
mgmt_txn_send_be_txn_delete(txn, adapter);
mgmt_try_move_commit_to_next_phase(txn, cmtcfg_req);
if (mm->perf_stats_en)
gettimeofday(&cmtcfg_req->cmt_stats->apply_cfg_end, NULL);
return 0;
}
int mgmt_txn_send_get_req(uint64_t txn_id, uint64_t req_id,
Mgmtd__DatastoreId ds_id, struct nb_config *cfg_root,
Mgmtd__YangGetDataReq **data_req, size_t num_reqs)
{
struct mgmt_txn_ctx *txn;
struct mgmt_txn_req *txn_req;
enum mgmt_txn_event req_event;
size_t indx;
txn = mgmt_txn_id2ctx(txn_id);
if (!txn)
return -1;
req_event = MGMTD_TXN_PROC_GETCFG;
txn_req = mgmt_txn_req_alloc(txn, req_id, req_event);
txn_req->req.get_data->ds_id = ds_id;
txn_req->req.get_data->cfg_root = cfg_root;
for (indx = 0;
indx < num_reqs && indx < MGMTD_MAX_NUM_DATA_REPLY_IN_BATCH;
indx++) {
MGMTD_TXN_DBG("XPath: '%s'", data_req[indx]->data->xpath);
txn_req->req.get_data->xpaths[indx] =
strdup(data_req[indx]->data->xpath);
txn_req->req.get_data->num_xpaths++;
}
mgmt_txn_register_event(txn, req_event);
return 0;
}
/**
* Send get-tree requests to each client indicated in `clients` bitmask, which
* has registered operational state that matches the given `xpath`
*/
int mgmt_txn_send_get_tree_oper(uint64_t txn_id, uint64_t req_id,
uint64_t clients, LYD_FORMAT result_type,
uint8_t flags, bool simple_xpath,
const char *xpath)
{
struct mgmt_msg_get_tree *msg;
struct mgmt_txn_ctx *txn;
struct mgmt_txn_req *txn_req;
struct txn_req_get_tree *get_tree;
enum mgmt_be_client_id id;
ssize_t slen = strlen(xpath);
int ret;
txn = mgmt_txn_id2ctx(txn_id);
if (!txn)
return -1;
/* If error in this function below here, be sure to free the req */
txn_req = mgmt_txn_req_alloc(txn, req_id, MGMTD_TXN_PROC_GETTREE);
get_tree = txn_req->req.get_tree;
get_tree->result_type = result_type;
get_tree->exact = CHECK_FLAG(flags, GET_DATA_FLAG_EXACT);
get_tree->simple_xpath = simple_xpath;
get_tree->xpath = XSTRDUP(MTYPE_MGMTD_XPATH, xpath);
if (CHECK_FLAG(flags, GET_DATA_FLAG_CONFIG)) {
struct mgmt_ds_ctx *ds =
mgmt_ds_get_ctx_by_id(mm, MGMTD_DS_RUNNING);
struct nb_config *config = mgmt_ds_get_nb_config(ds);
if (config) {
struct ly_set *set = NULL;
LY_ERR err;
err = lyd_find_xpath(config->dnode, xpath, &set);
if (err) {
get_tree->partial_error = err;
goto state;
}
/*
* If there's a single result, duplicate the returned
* node. If there are multiple results, duplicate the
* whole config and mark simple_xpath as false so the
* result is trimmed later in txn_get_tree_data_done.
*/
if (set->count == 1) {
err = lyd_dup_single(set->dnodes[0], NULL,
LYD_DUP_WITH_PARENTS |
LYD_DUP_WITH_FLAGS |
LYD_DUP_RECURSIVE,
&get_tree->client_results);
if (!err)
while (get_tree->client_results->parent)
get_tree->client_results = lyd_parent(
get_tree->client_results);
} else if (set->count > 1) {
err = lyd_dup_siblings(config->dnode, NULL,
LYD_DUP_RECURSIVE |
LYD_DUP_WITH_FLAGS,
&get_tree->client_results);
if (!err)
get_tree->simple_xpath = false;
}
if (err)
get_tree->partial_error = err;
ly_set_free(set, NULL);
}
}
state:
/* If we are only getting config, we are done */
if (!CHECK_FLAG(flags, GET_DATA_FLAG_STATE) || !clients)
return txn_get_tree_data_done(txn, txn_req);
msg = mgmt_msg_native_alloc_msg(struct mgmt_msg_get_tree, slen + 1,
MTYPE_MSG_NATIVE_GET_TREE);
msg->refer_id = txn_id;
msg->req_id = req_id;
msg->code = MGMT_MSG_CODE_GET_TREE;
/* Always operate with the binary format in the backend */
msg->result_type = LYD_LYB;
strlcpy(msg->xpath, xpath, slen + 1);
assert(clients);
FOREACH_BE_CLIENT_BITS (id, clients) {
ret = mgmt_be_send_native(id, msg);
if (ret) {
MGMTD_TXN_ERR("Could not send get-tree message to backend client %s",
mgmt_be_client_id2name(id));
continue;
}
MGMTD_TXN_DBG("Sent get-tree req to backend client %s",
mgmt_be_client_id2name(id));
/* record that we sent the request to the client */
get_tree->sent_clients |= (1u << id);
}
mgmt_msg_native_free_msg(msg);
/* Start timeout timer - pulled out of register event code so we can
* pass a different arg
*/
event_add_timer(mgmt_txn_tm, txn_get_tree_timeout, txn_req,
MGMTD_TXN_GET_TREE_MAX_DELAY_SEC,
&txn->get_tree_timeout);
return 0;
}
/*
* Error reply from the backend client.
*/
int mgmt_txn_notify_error(struct mgmt_be_client_adapter *adapter,
uint64_t txn_id, uint64_t req_id, int error,
const char *errstr)
{
enum mgmt_be_client_id id = adapter->id;
struct mgmt_txn_ctx *txn = mgmt_txn_id2ctx(txn_id);
struct txn_req_get_tree *get_tree;
struct mgmt_txn_req *txn_req;
if (!txn) {
MGMTD_TXN_ERR("Error reply from %s cannot find txn-id %" PRIu64,
adapter->name, txn_id);
return -1;
}
/* Find the request. */
FOREACH_TXN_REQ_IN_LIST (&txn->get_tree_reqs, txn_req)
if (txn_req->req_id == req_id)
break;
if (!txn_req) {
MGMTD_TXN_ERR("Error reply from %s for txn-id %" PRIu64
" cannot find req_id %" PRIu64,
adapter->name, txn_id, req_id);
return -1;
}
MGMTD_TXN_ERR("Error reply from %s for txn-id %" PRIu64
" req_id %" PRIu64,
adapter->name, txn_id, req_id);
switch (txn_req->req_event) {
case MGMTD_TXN_PROC_GETTREE:
get_tree = txn_req->req.get_tree;
get_tree->recv_clients |= (1u << id);
get_tree->partial_error = error;
/* check if done yet */
if (get_tree->recv_clients != get_tree->sent_clients)
return 0;
return txn_get_tree_data_done(txn, txn_req);
/* non-native message events */
case MGMTD_TXN_PROC_SETCFG:
case MGMTD_TXN_PROC_COMMITCFG:
case MGMTD_TXN_PROC_GETCFG:
case MGMTD_TXN_COMMITCFG_TIMEOUT:
case MGMTD_TXN_GETTREE_TIMEOUT:
case MGMTD_TXN_CLEANUP:
default:
assert(!"non-native req event in native erorr path");
return -1;
}
}
/*
* Get-tree data from the backend client.
*/
int mgmt_txn_notify_tree_data_reply(struct mgmt_be_client_adapter *adapter,
struct mgmt_msg_tree_data *data_msg,
size_t msg_len)
{
uint64_t txn_id = data_msg->refer_id;
uint64_t req_id = data_msg->req_id;
enum mgmt_be_client_id id = adapter->id;
struct mgmt_txn_ctx *txn = mgmt_txn_id2ctx(txn_id);
struct mgmt_txn_req *txn_req;
struct txn_req_get_tree *get_tree;
struct lyd_node *tree = NULL;
LY_ERR err;
if (!txn) {
MGMTD_TXN_ERR("GETTREE reply from %s for a missing txn-id %" PRIu64,
adapter->name, txn_id);
return -1;
}
/* Find the request. */
FOREACH_TXN_REQ_IN_LIST (&txn->get_tree_reqs, txn_req)
if (txn_req->req_id == req_id)
break;
if (!txn_req) {
MGMTD_TXN_ERR("GETTREE reply from %s for txn-id %" PRIu64
" missing req_id %" PRIu64,
adapter->name, txn_id, req_id);
return -1;
}
get_tree = txn_req->req.get_tree;
/* store the result */
err = lyd_parse_data_mem(ly_native_ctx, (const char *)data_msg->result,
data_msg->result_type,
LYD_PARSE_STRICT | LYD_PARSE_ONLY,
0 /*LYD_VALIDATE_OPERATIONAL*/, &tree);
if (err) {
MGMTD_TXN_ERR("GETTREE reply from %s for txn-id %" PRIu64
" req_id %" PRIu64
" error parsing result of type %u",
adapter->name, txn_id, req_id,
data_msg->result_type);
}
if (!err) {
/* TODO: we could merge ly_errs here if it's not binary */
if (!get_tree->client_results)
get_tree->client_results = tree;
else
err = lyd_merge_siblings(&get_tree->client_results,
tree, LYD_MERGE_DESTRUCT);
if (err) {
MGMTD_TXN_ERR("GETTREE reply from %s for txn-id %" PRIu64
" req_id %" PRIu64 " error merging result",
adapter->name, txn_id, req_id);
}
}
if (!get_tree->partial_error)
get_tree->partial_error = (data_msg->partial_error
? data_msg->partial_error
: (int)err);
if (!data_msg->more)
get_tree->recv_clients |= (1u << id);
/* check if done yet */
if (get_tree->recv_clients != get_tree->sent_clients)
return 0;
return txn_get_tree_data_done(txn, txn_req);
}
void mgmt_txn_status_write(struct vty *vty)
{
struct mgmt_txn_ctx *txn;
vty_out(vty, "MGMTD Transactions\n");
FOREACH_TXN_IN_LIST (mgmt_txn_mm, txn) {
vty_out(vty, " Txn: \t\t\t0x%p\n", txn);
vty_out(vty, " Txn-Id: \t\t\t%" PRIu64 "\n", txn->txn_id);
vty_out(vty, " Session-Id: \t\t%" PRIu64 "\n",
txn->session_id);
vty_out(vty, " Type: \t\t\t%s\n",
mgmt_txn_type2str(txn->type));
vty_out(vty, " Ref-Count: \t\t\t%d\n", txn->refcount);
}
vty_out(vty, " Total: %d\n",
(int)mgmt_txns_count(&mgmt_txn_mm->txn_list));
}
int mgmt_txn_rollback_trigger_cfg_apply(struct mgmt_ds_ctx *src_ds_ctx,
struct mgmt_ds_ctx *dst_ds_ctx)
{
static struct nb_config_cbs changes;
static struct mgmt_commit_stats dummy_stats;
struct nb_config_cbs *cfg_chgs = NULL;
struct mgmt_txn_ctx *txn;
struct mgmt_txn_req *txn_req;
memset(&changes, 0, sizeof(changes));
memset(&dummy_stats, 0, sizeof(dummy_stats));
/*
* This could be the case when the config is directly
* loaded onto the candidate DS from a file. Get the
* diff from a full comparison of the candidate and
* running DSs.
*/
nb_config_diff(mgmt_ds_get_nb_config(dst_ds_ctx),
mgmt_ds_get_nb_config(src_ds_ctx), &changes);
cfg_chgs = &changes;
if (RB_EMPTY(nb_config_cbs, cfg_chgs)) {
/*
* This means there's no changes to commit whatsoever
* is the source of the changes in config.
*/
return -1;
}
/*
* Create a CONFIG transaction to push the config changes
* provided to the backend client.
*/
txn = mgmt_txn_create_new(0, MGMTD_TXN_TYPE_CONFIG);
if (!txn) {
MGMTD_TXN_ERR(
"Failed to create CONFIG Transaction for downloading CONFIGs");
return -1;
}
MGMTD_TXN_DBG("Created rollback txn-id: %" PRIu64, txn->txn_id);
/*
* Set the changeset for transaction to commit and trigger the commit
* request.
*/
txn_req = mgmt_txn_req_alloc(txn, 0, MGMTD_TXN_PROC_COMMITCFG);
txn_req->req.commit_cfg.src_ds_id = MGMTD_DS_CANDIDATE;
txn_req->req.commit_cfg.src_ds_ctx = src_ds_ctx;
txn_req->req.commit_cfg.dst_ds_id = MGMTD_DS_RUNNING;
txn_req->req.commit_cfg.dst_ds_ctx = dst_ds_ctx;
txn_req->req.commit_cfg.validate_only = false;
txn_req->req.commit_cfg.abort = false;
txn_req->req.commit_cfg.rollback = true;
txn_req->req.commit_cfg.cmt_stats = &dummy_stats;
txn_req->req.commit_cfg.cfg_chgs = cfg_chgs;
/*
* Trigger a COMMIT-CONFIG process.
*/
mgmt_txn_register_event(txn, MGMTD_TXN_PROC_COMMITCFG);
return 0;
}
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