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mgmt_txn.c
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mgmt_txn.c
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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 __dbg(fmt, ...) \
DEBUGD(&mgmt_debug_txn, "TXN: %s: " fmt, __func__, ##__VA_ARGS__)
#define __log_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_PROC_RPC,
MGMTD_TXN_COMMITCFG_TIMEOUT,
};
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_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_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_edit_req {
char xpath_created[XPATH_MAXLEN];
bool created;
bool unlock;
};
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;
uint8_t init : 1;
/* Track commit phases */
enum mgmt_commit_phase phase;
enum mgmt_commit_phase be_phase[MGMTD_BE_CLIENT_ID_MAX];
/*
* Additional information when the commit is triggered by native edit
* request.
*/
struct mgmt_edit_req *edit;
/*
* 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 wd_options; /* LYD_PRINT_WD_* flags 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 txn_req_rpc {
char *xpath; /* xpath of rpc/action to invoke */
uint64_t sent_clients; /* Bitmask of clients sent req to */
uint64_t recv_clients; /* Bitmask of clients recv reply from */
uint8_t result_type; /* LYD_FORMAT for results */
char *errstr; /* error string */
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 txn_req_rpc *rpc;
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 *rpc_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;
/*
* List of pending rpc requests.
*/
struct mgmt_txn_reqs_head rpc_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 void mgmt_txn_cleanup_txn(struct mgmt_txn_ctx **txn);
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;
__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);
__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;
__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);
__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);
__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_PROC_RPC:
txn_req->req.rpc = XCALLOC(MTYPE_MGMTD_TXN_RPC_REQ,
sizeof(struct txn_req_rpc));
assert(txn_req->req.rpc);
mgmt_txn_reqs_add_tail(&txn->rpc_reqs, txn_req);
__dbg("Added a new RPC 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:
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;
struct mgmt_set_cfg_req *set_cfg;
bool cleanup;
switch ((*txn_req)->req_event) {
case MGMTD_TXN_PROC_SETCFG:
set_cfg = (*txn_req)->req.set_cfg;
for (indx = 0; indx < set_cfg->num_cfg_changes; indx++) {
if (set_cfg->cfg_changes[indx].value)
free((void *)set_cfg->cfg_changes[indx].value);
}
req_list = &(*txn_req)->txn->set_cfg_reqs;
__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:
__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);
XFREE(MTYPE_MGMTD_TXN_REQ, ccreq->edit);
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;
__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:
__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_PROC_RPC:
__dbg("Deleting RPC req-id: %" PRIu64 " txn-id: %" PRIu64,
(*txn_req)->req_id, (*txn_req)->txn->txn_id);
req_list = &(*txn_req)->txn->rpc_reqs;
lyd_free_all((*txn_req)->req.rpc->client_results);
XFREE(MTYPE_MGMTD_ERR, (*txn_req)->req.rpc->errstr);
XFREE(MTYPE_MGMTD_XPATH, (*txn_req)->req.rpc->xpath);
XFREE(MTYPE_MGMTD_TXN_RPC_REQ, (*txn_req)->req.rpc);
break;
case MGMTD_TXN_COMMITCFG_TIMEOUT:
break;
}
if (req_list) {
mgmt_txn_reqs_del(req_list, *txn_req);
__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);
__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, false, 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)) {
__log_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,
NULL);
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) {
__log_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) {
__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.edit &&
!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) {
__log_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.edit &&
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) {
__log_err("Failed to send SET-CONFIG-REPLY txn-id: %" PRIu64
" session-id: %" PRIu64,
txn->txn_id, txn->session_id);
}
if (txn->commit_cfg_req->req.commit_cfg.edit &&
mgmt_fe_adapter_send_edit_reply(txn->session_id, txn->txn_id,
txn->commit_cfg_req->req_id,
txn->commit_cfg_req->req.commit_cfg
.edit->unlock,
true,
txn->commit_cfg_req->req.commit_cfg
.edit->created,
txn->commit_cfg_req->req.commit_cfg
.edit->xpath_created,
success ? 0 : -1,
error_if_any) != 0) {
__log_err("Failed to send EDIT-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);
}
if (txn->commit_cfg_req->req.commit_cfg.init) {
/*
* This is the backend init request.
* We need to unlock the running datastore.
*/
mgmt_ds_unlock(txn->commit_cfg_req->req.commit_cfg.dst_ds_ctx);
}
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_cleanup_txn(&txn);
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;
__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++;
__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;
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;
__dbg("XPATH: %s, Value: '%s'", xpath, value ? value : "NIL");
clients =
mgmt_be_interested_clients(xpath,
MGMT_BE_XPATH_SUBSCR_TYPE_CFG);
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;
__dbg(" -- %s, batch item:%d", adapter->name,
(int)batch->num_cfg_data);
batch->num_cfg_data++;
num_chgs++;
}
if (!chg_clients)
__dbg("Daemons interested in XPATH are not currently connected: %s",
xpath);
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 connected daemons interested in changes");
return -1;
}