{
struct nrs_tbf_rule *rule;
+ memset(cli, 0, sizeof(*cli));
cli->tc_in_heap = false;
head->th_ops->o_cli_init(cli, req);
INIT_LIST_HEAD(&cli->tc_list);
head->th_rule = rule;
}
+ CDEBUG(D_RPCTRACE, "TBF starts rule@%p rate %llu gen %llu\n",
+ rule, rule->tr_rpc_rate, rule->tr_generation);
+
return 0;
}
struct hlist_node *hnode;
struct nrs_tbf_client *cli;
- /* cfs_hash_bd_peek_locked is a somehow "internal" function
- * of cfs_hash, it doesn't add refcount on object. */
- hnode = cfs_hash_bd_peek_locked(hs, bd, (void *)jobid);
+ hnode = cfs_hash_bd_lookup_locked(hs, bd, (void *)jobid);
if (hnode == NULL)
return NULL;
- cfs_hash_get(hs, hnode);
cli = container_of0(hnode, struct nrs_tbf_client, tc_hnode);
if (!list_empty(&cli->tc_lru))
list_del_init(&cli->tc_lru);
start.tc_name = NRS_TBF_DEFAULT_RULE;
INIT_LIST_HEAD(&start.u.tc_start.ts_jobids);
rc = nrs_tbf_rule_start(policy, head, &start);
+ if (rc) {
+ cfs_hash_putref(head->th_cli_hash);
+ head->th_cli_hash = NULL;
+ }
return rc;
}
}
static int
-nrs_tbf_jobid_list_add(const struct cfs_lstr *id, struct list_head *jobid_list)
+nrs_tbf_jobid_list_add(struct cfs_lstr *id, struct list_head *jobid_list)
{
struct nrs_tbf_jobid *jobid;
+ struct cfs_lstr res;
+ int rc;
OBD_ALLOC(jobid, sizeof(struct nrs_tbf_jobid));
if (jobid == NULL)
}
memcpy(jobid->tj_id, id->ls_str, id->ls_len);
+ rc = cfs_gettok(id, '*', &res);
+ if (rc == 0)
+ jobid->tj_match_flag = NRS_TBF_MATCH_FULL;
+ else
+ jobid->tj_match_flag = NRS_TBF_MATCH_WILDCARD;
+
list_add_tail(&jobid->tj_linkage, jobid_list);
return 0;
}
+static bool
+cfs_match_wildcard(const char *pattern, const char *content)
+{
+ if (*pattern == '\0' && *content == '\0')
+ return true;
+
+ if (*pattern == '*' && *(pattern + 1) != '\0' && *content == '\0')
+ return false;
+
+ while (*pattern == *content) {
+ pattern++;
+ content++;
+ if (*pattern == '\0' && *content == '\0')
+ return true;
+
+ if (*pattern == '*' && *(pattern + 1) != '\0' &&
+ *content == '\0')
+ return false;
+ }
+
+ if (*pattern == '*')
+ return (cfs_match_wildcard(pattern + 1, content) ||
+ cfs_match_wildcard(pattern, content + 1));
+
+ return false;
+}
+
+static inline bool
+nrs_tbf_jobid_match(const struct nrs_tbf_jobid *jobid, const char *id)
+{
+ if (jobid->tj_match_flag == NRS_TBF_MATCH_FULL)
+ return strcmp(jobid->tj_id, id) == 0;
+
+ if (jobid->tj_match_flag == NRS_TBF_MATCH_WILDCARD)
+ return cfs_match_wildcard(jobid->tj_id, id);
+
+ return false;
+}
+
static int
nrs_tbf_jobid_list_match(struct list_head *jobid_list, char *id)
{
struct nrs_tbf_jobid *jobid;
list_for_each_entry(jobid, jobid_list, tj_linkage) {
- if (strcmp(id, jobid->tj_id) == 0)
+ if (nrs_tbf_jobid_match(jobid, id))
return 1;
}
return 0;
* This uses ptlrpc_request::rq_peer.nid as its key, in order to hash
* nrs_tbf_client objects.
*/
-#define NRS_TBF_NID_BKT_BITS 8
-#define NRS_TBF_NID_BITS 16
+#define NRS_TBF_NID_BKT_BITS 8
+#define NRS_TBF_NID_BITS 16
static unsigned nrs_tbf_nid_hop_hash(struct cfs_hash *hs, const void *key,
unsigned mask)
start.tc_name = NRS_TBF_DEFAULT_RULE;
INIT_LIST_HEAD(&start.u.tc_start.ts_nids);
rc = nrs_tbf_rule_start(policy, head, &start);
+ if (rc) {
+ cfs_hash_putref(head->th_cli_hash);
+ head->th_cli_hash = NULL;
+ }
return rc;
}
.o_rule_fini = nrs_tbf_nid_rule_fini,
};
-/**
- * Is called before the policy transitions into
- * ptlrpc_nrs_pol_state::NRS_POL_STATE_STARTED; allocates and initializes a
- * policy-specific private data structure.
- *
- * \param[in] policy The policy to start
- *
- * \retval -ENOMEM OOM error
- * \retval 0 success
- *
- * \see nrs_policy_register()
- * \see nrs_policy_ctl()
- */
-static int nrs_tbf_start(struct ptlrpc_nrs_policy *policy, char *arg)
+static unsigned nrs_tbf_hop_hash(struct cfs_hash *hs, const void *key,
+ unsigned mask)
{
- struct nrs_tbf_head *head;
- struct nrs_tbf_ops *ops;
- __u32 type;
- int rc = 0;
-
- if (arg == NULL || strlen(arg) > NRS_TBF_TYPE_MAX_LEN)
- GOTO(out, rc = -EINVAL);
+ return cfs_hash_djb2_hash(key, strlen(key), mask);
+}
- if (strcmp(arg, NRS_TBF_TYPE_NID) == 0) {
- ops = &nrs_tbf_nid_ops;
- type = NRS_TBF_FLAG_NID;
- } else if (strcmp(arg, NRS_TBF_TYPE_JOBID) == 0) {
- ops = &nrs_tbf_jobid_ops;
- type = NRS_TBF_FLAG_JOBID;
- } else
- GOTO(out, rc = -ENOTSUPP);
+static int nrs_tbf_hop_keycmp(const void *key, struct hlist_node *hnode)
+{
+ struct nrs_tbf_client *cli = hlist_entry(hnode,
+ struct nrs_tbf_client,
+ tc_hnode);
- OBD_CPT_ALLOC_PTR(head, nrs_pol2cptab(policy), nrs_pol2cptid(policy));
- if (head == NULL)
- GOTO(out, rc = -ENOMEM);
+ return (strcmp(cli->tc_key, key) == 0);
+}
- memcpy(head->th_type, arg, strlen(arg));
- head->th_type[strlen(arg)] = '\0';
- head->th_ops = ops;
- head->th_type_flag = type;
+static void *nrs_tbf_hop_key(struct hlist_node *hnode)
+{
+ struct nrs_tbf_client *cli = hlist_entry(hnode,
+ struct nrs_tbf_client,
+ tc_hnode);
+ return cli->tc_key;
+}
- head->th_binheap = cfs_binheap_create(&nrs_tbf_heap_ops,
- CBH_FLAG_ATOMIC_GROW, 4096, NULL,
- nrs_pol2cptab(policy),
- nrs_pol2cptid(policy));
- if (head->th_binheap == NULL)
- GOTO(out_free_head, rc = -ENOMEM);
+static void *nrs_tbf_hop_object(struct hlist_node *hnode)
+{
+ return hlist_entry(hnode, struct nrs_tbf_client, tc_hnode);
+}
- atomic_set(&head->th_rule_sequence, 0);
- spin_lock_init(&head->th_rule_lock);
- INIT_LIST_HEAD(&head->th_list);
- hrtimer_init(&head->th_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
- head->th_timer.function = nrs_tbf_timer_cb;
- rc = head->th_ops->o_startup(policy, head);
- if (rc)
- GOTO(out_free_heap, rc);
+static void nrs_tbf_hop_get(struct cfs_hash *hs, struct hlist_node *hnode)
+{
+ struct nrs_tbf_client *cli = hlist_entry(hnode,
+ struct nrs_tbf_client,
+ tc_hnode);
- policy->pol_private = head;
- return 0;
-out_free_heap:
- cfs_binheap_destroy(head->th_binheap);
-out_free_head:
- OBD_FREE_PTR(head);
-out:
- return rc;
+ atomic_inc(&cli->tc_ref);
}
-/**
- * Is called before the policy transitions into
- * ptlrpc_nrs_pol_state::NRS_POL_STATE_STOPPED; deallocates the policy-specific
- * private data structure.
- *
- * \param[in] policy The policy to stop
- *
- * \see nrs_policy_stop0()
- */
-static void nrs_tbf_stop(struct ptlrpc_nrs_policy *policy)
+static void nrs_tbf_hop_put(struct cfs_hash *hs, struct hlist_node *hnode)
{
- struct nrs_tbf_head *head = policy->pol_private;
- struct ptlrpc_nrs *nrs = policy->pol_nrs;
- struct nrs_tbf_rule *rule, *n;
+ struct nrs_tbf_client *cli = hlist_entry(hnode,
+ struct nrs_tbf_client,
+ tc_hnode);
- LASSERT(head != NULL);
- LASSERT(head->th_cli_hash != NULL);
- hrtimer_cancel(&head->th_timer);
- /* Should cleanup hash first before free rules */
- cfs_hash_putref(head->th_cli_hash);
- list_for_each_entry_safe(rule, n, &head->th_list, tr_linkage) {
- list_del_init(&rule->tr_linkage);
- nrs_tbf_rule_put(rule);
- }
- LASSERT(list_empty(&head->th_list));
- LASSERT(head->th_binheap != NULL);
- LASSERT(cfs_binheap_is_empty(head->th_binheap));
- cfs_binheap_destroy(head->th_binheap);
- OBD_FREE_PTR(head);
- nrs->nrs_throttling = 0;
- wake_up(&policy->pol_nrs->nrs_svcpt->scp_waitq);
+ atomic_dec(&cli->tc_ref);
}
-/**
- * Performs a policy-specific ctl function on TBF policy instances; similar
- * to ioctl.
- *
- * \param[in] policy the policy instance
- * \param[in] opc the opcode
- * \param[in,out] arg used for passing parameters and information
- *
- * \pre assert_spin_locked(&policy->pol_nrs->->nrs_lock)
- * \post assert_spin_locked(&policy->pol_nrs->->nrs_lock)
- *
- * \retval 0 operation carried out successfully
- * \retval -ve error
- */
-static int nrs_tbf_ctl(struct ptlrpc_nrs_policy *policy,
- enum ptlrpc_nrs_ctl opc,
- void *arg)
+static void nrs_tbf_hop_exit(struct cfs_hash *hs, struct hlist_node *hnode)
+
{
- int rc = 0;
- ENTRY;
+ struct nrs_tbf_client *cli = hlist_entry(hnode,
+ struct nrs_tbf_client,
+ tc_hnode);
- assert_spin_locked(&policy->pol_nrs->nrs_lock);
+ LASSERT(atomic_read(&cli->tc_ref) == 0);
+ nrs_tbf_cli_fini(cli);
+}
- switch ((enum nrs_ctl_tbf)opc) {
- default:
- RETURN(-EINVAL);
+static struct cfs_hash_ops nrs_tbf_hash_ops = {
+ .hs_hash = nrs_tbf_hop_hash,
+ .hs_keycmp = nrs_tbf_hop_keycmp,
+ .hs_key = nrs_tbf_hop_key,
+ .hs_object = nrs_tbf_hop_object,
+ .hs_get = nrs_tbf_hop_get,
+ .hs_put = nrs_tbf_hop_put,
+ .hs_put_locked = nrs_tbf_hop_put,
+ .hs_exit = nrs_tbf_hop_exit,
+};
- /**
- * Read RPC rate size of a policy instance.
- */
- case NRS_CTL_TBF_RD_RULE: {
- struct nrs_tbf_head *head = policy->pol_private;
- struct seq_file *m = (struct seq_file *) arg;
- struct ptlrpc_service_part *svcpt;
+#define NRS_TBF_GENERIC_BKT_BITS 10
+#define NRS_TBF_GENERIC_HASH_FLAGS (CFS_HASH_SPIN_BKTLOCK | \
+ CFS_HASH_NO_ITEMREF | \
+ CFS_HASH_DEPTH)
- svcpt = policy->pol_nrs->nrs_svcpt;
- seq_printf(m, "CPT %d:\n", svcpt->scp_cpt);
+static int
+nrs_tbf_startup(struct ptlrpc_nrs_policy *policy, struct nrs_tbf_head *head)
+{
+ struct nrs_tbf_cmd start;
+ struct nrs_tbf_bucket *bkt;
+ int bits;
+ int i;
+ int rc;
+ struct cfs_hash_bd bd;
- rc = nrs_tbf_rule_dump_all(head, m);
- }
- break;
+ bits = nrs_tbf_jobid_hash_order();
+ if (bits < NRS_TBF_GENERIC_BKT_BITS)
+ bits = NRS_TBF_GENERIC_BKT_BITS;
+ head->th_cli_hash = cfs_hash_create("nrs_tbf_hash",
+ bits, bits,
+ NRS_TBF_GENERIC_BKT_BITS,
+ sizeof(*bkt), 0, 0,
+ &nrs_tbf_hash_ops,
+ NRS_TBF_GENERIC_HASH_FLAGS);
+ if (head->th_cli_hash == NULL)
+ return -ENOMEM;
- /**
- * Write RPC rate of a policy instance.
- */
- case NRS_CTL_TBF_WR_RULE: {
- struct nrs_tbf_head *head = policy->pol_private;
- struct nrs_tbf_cmd *cmd;
+ cfs_hash_for_each_bucket(head->th_cli_hash, &bd, i) {
+ bkt = cfs_hash_bd_extra_get(head->th_cli_hash, &bd);
+ INIT_LIST_HEAD(&bkt->ntb_lru);
+ }
- cmd = (struct nrs_tbf_cmd *)arg;
- rc = nrs_tbf_command(policy,
- head,
- cmd);
- }
- break;
- /**
- * Read the TBF policy type of a policy instance.
- */
- case NRS_CTL_TBF_RD_TYPE_FLAG: {
- struct nrs_tbf_head *head = policy->pol_private;
+ memset(&start, 0, sizeof(start));
+ start.u.tc_start.ts_conds_str = "*";
- *(__u32 *)arg = head->th_type_flag;
- }
- break;
- }
+ start.u.tc_start.ts_rpc_rate = tbf_rate;
+ start.u.tc_start.ts_rule_flags = NTRS_DEFAULT;
+ start.tc_name = NRS_TBF_DEFAULT_RULE;
+ INIT_LIST_HEAD(&start.u.tc_start.ts_conds);
+ rc = nrs_tbf_rule_start(policy, head, &start);
+ if (rc)
+ cfs_hash_putref(head->th_cli_hash);
- RETURN(rc);
+ return rc;
}
-/**
- * Is called for obtaining a TBF policy resource.
- *
- * \param[in] policy The policy on which the request is being asked for
- * \param[in] nrq The request for which resources are being taken
- * \param[in] parent Parent resource, unused in this policy
- * \param[out] resp Resources references are placed in this array
- * \param[in] moving_req Signifies limited caller context; unused in this
- * policy
- *
- *
- * \see nrs_resource_get_safe()
- */
-static int nrs_tbf_res_get(struct ptlrpc_nrs_policy *policy,
- struct ptlrpc_nrs_request *nrq,
- const struct ptlrpc_nrs_resource *parent,
- struct ptlrpc_nrs_resource **resp,
- bool moving_req)
+static struct nrs_tbf_client *
+nrs_tbf_cli_hash_lookup(struct cfs_hash *hs, struct cfs_hash_bd *bd,
+ const char *key)
{
- struct nrs_tbf_head *head;
+ struct hlist_node *hnode;
struct nrs_tbf_client *cli;
- struct nrs_tbf_client *tmp;
- struct ptlrpc_request *req;
-
- if (parent == NULL) {
- *resp = &((struct nrs_tbf_head *)policy->pol_private)->th_res;
- return 0;
- }
- head = container_of(parent, struct nrs_tbf_head, th_res);
- req = container_of(nrq, struct ptlrpc_request, rq_nrq);
- cli = head->th_ops->o_cli_find(head, req);
- if (cli != NULL) {
- spin_lock(&policy->pol_nrs->nrs_svcpt->scp_req_lock);
- LASSERT(cli->tc_rule);
- if (cli->tc_rule_sequence !=
- atomic_read(&head->th_rule_sequence) ||
- cli->tc_rule->tr_flags & NTRS_STOPPING) {
- struct nrs_tbf_rule *rule;
+ hnode = cfs_hash_bd_lookup_locked(hs, bd, (void *)key);
+ if (hnode == NULL)
+ return NULL;
- rule = nrs_tbf_rule_match(head, cli);
- if (rule != cli->tc_rule)
- nrs_tbf_cli_reset(head, rule, cli);
- else
+ cli = container_of0(hnode, struct nrs_tbf_client, tc_hnode);
+ if (!list_empty(&cli->tc_lru))
+ list_del_init(&cli->tc_lru);
+ return cli;
+}
+
+static struct nrs_tbf_client *
+nrs_tbf_cli_find(struct nrs_tbf_head *head, struct ptlrpc_request *req)
+{
+ struct nrs_tbf_client *cli;
+ struct cfs_hash *hs = head->th_cli_hash;
+ struct cfs_hash_bd bd;
+ char keystr[NRS_TBF_KEY_LEN] = { '\0' };
+ const char *jobid;
+ __u32 opc;
+
+ jobid = lustre_msg_get_jobid(req->rq_reqmsg);
+ if (jobid == NULL)
+ jobid = NRS_TBF_JOBID_NULL;
+ opc = lustre_msg_get_opc(req->rq_reqmsg);
+ snprintf(keystr, sizeof(keystr), "%s_%s_%d", jobid,
+ libcfs_nid2str(req->rq_peer.nid), opc);
+ LASSERT(strlen(keystr) < NRS_TBF_KEY_LEN);
+ cfs_hash_bd_get_and_lock(hs, (void *)keystr, &bd, 1);
+ cli = nrs_tbf_cli_hash_lookup(hs, &bd, keystr);
+ cfs_hash_bd_unlock(hs, &bd, 1);
+
+ return cli;
+}
+
+static struct nrs_tbf_client *
+nrs_tbf_cli_findadd(struct nrs_tbf_head *head,
+ struct nrs_tbf_client *cli)
+{
+ const char *key;
+ struct nrs_tbf_client *ret;
+ struct cfs_hash *hs = head->th_cli_hash;
+ struct cfs_hash_bd bd;
+
+ key = cli->tc_key;
+ cfs_hash_bd_get_and_lock(hs, (void *)key, &bd, 1);
+ ret = nrs_tbf_cli_hash_lookup(hs, &bd, key);
+ if (ret == NULL) {
+ cfs_hash_bd_add_locked(hs, &bd, &cli->tc_hnode);
+ ret = cli;
+ }
+ cfs_hash_bd_unlock(hs, &bd, 1);
+
+ return ret;
+}
+
+static void
+nrs_tbf_cli_put(struct nrs_tbf_head *head, struct nrs_tbf_client *cli)
+{
+ struct cfs_hash_bd bd;
+ struct cfs_hash *hs = head->th_cli_hash;
+ struct nrs_tbf_bucket *bkt;
+ int hw;
+ struct list_head zombies;
+
+ INIT_LIST_HEAD(&zombies);
+ cfs_hash_bd_get(hs, &cli->tc_key, &bd);
+ bkt = cfs_hash_bd_extra_get(hs, &bd);
+ if (!cfs_hash_bd_dec_and_lock(hs, &bd, &cli->tc_ref))
+ return;
+ LASSERT(list_empty(&cli->tc_lru));
+ list_add_tail(&cli->tc_lru, &bkt->ntb_lru);
+
+ /**
+ * Check and purge the LRU, there is at least one client in the LRU.
+ */
+ hw = tbf_jobid_cache_size >> (hs->hs_cur_bits - hs->hs_bkt_bits);
+ while (cfs_hash_bd_count_get(&bd) > hw) {
+ if (unlikely(list_empty(&bkt->ntb_lru)))
+ break;
+ cli = list_entry(bkt->ntb_lru.next,
+ struct nrs_tbf_client,
+ tc_lru);
+ LASSERT(atomic_read(&cli->tc_ref) == 0);
+ cfs_hash_bd_del_locked(hs, &bd, &cli->tc_hnode);
+ list_move(&cli->tc_lru, &zombies);
+ }
+ cfs_hash_bd_unlock(head->th_cli_hash, &bd, 1);
+
+ while (!list_empty(&zombies)) {
+ cli = container_of0(zombies.next,
+ struct nrs_tbf_client, tc_lru);
+ list_del_init(&cli->tc_lru);
+ nrs_tbf_cli_fini(cli);
+ }
+}
+
+static void
+nrs_tbf_generic_cli_init(struct nrs_tbf_client *cli,
+ struct ptlrpc_request *req)
+{
+ char keystr[NRS_TBF_KEY_LEN];
+ const char *jobid;
+ __u32 opc;
+
+ jobid = lustre_msg_get_jobid(req->rq_reqmsg);
+ if (jobid == NULL)
+ jobid = NRS_TBF_JOBID_NULL;
+ opc = lustre_msg_get_opc(req->rq_reqmsg);
+ snprintf(keystr, sizeof(keystr), "%s_%s_%d", jobid,
+ libcfs_nid2str(req->rq_peer.nid), opc);
+
+ LASSERT(strlen(keystr) < NRS_TBF_KEY_LEN);
+ INIT_LIST_HEAD(&cli->tc_lru);
+ memcpy(cli->tc_key, keystr, strlen(keystr));
+ memcpy(cli->tc_jobid, jobid, strlen(jobid));
+ cli->tc_nid = req->rq_peer.nid;
+ cli->tc_opcode = opc;
+}
+
+static void
+nrs_tbf_expression_free(struct nrs_tbf_expression *expr)
+{
+ LASSERT(expr->te_field >= NRS_TBF_FIELD_NID &&
+ expr->te_field < NRS_TBF_FIELD_MAX);
+ switch (expr->te_field) {
+ case NRS_TBF_FIELD_NID:
+ cfs_free_nidlist(&expr->te_cond);
+ break;
+ case NRS_TBF_FIELD_JOBID:
+ nrs_tbf_jobid_list_free(&expr->te_cond);
+ break;
+ case NRS_TBF_FIELD_OPCODE:
+ CFS_FREE_BITMAP(expr->te_opcodes);
+ break;
+ default:
+ LBUG();
+ }
+ OBD_FREE_PTR(expr);
+}
+
+static void
+nrs_tbf_conjunction_free(struct nrs_tbf_conjunction *conjunction)
+{
+ struct nrs_tbf_expression *expression;
+ struct nrs_tbf_expression *n;
+
+ LASSERT(list_empty(&conjunction->tc_linkage));
+ list_for_each_entry_safe(expression, n,
+ &conjunction->tc_expressions,
+ te_linkage) {
+ list_del_init(&expression->te_linkage);
+ nrs_tbf_expression_free(expression);
+ }
+ OBD_FREE_PTR(conjunction);
+}
+
+static void
+nrs_tbf_conds_free(struct list_head *cond_list)
+{
+ struct nrs_tbf_conjunction *conjunction;
+ struct nrs_tbf_conjunction *n;
+
+ list_for_each_entry_safe(conjunction, n, cond_list, tc_linkage) {
+ list_del_init(&conjunction->tc_linkage);
+ nrs_tbf_conjunction_free(conjunction);
+ }
+}
+
+static void
+nrs_tbf_generic_cmd_fini(struct nrs_tbf_cmd *cmd)
+{
+ if (!list_empty(&cmd->u.tc_start.ts_conds))
+ nrs_tbf_conds_free(&cmd->u.tc_start.ts_conds);
+ if (cmd->u.tc_start.ts_conds_str)
+ OBD_FREE(cmd->u.tc_start.ts_conds_str,
+ strlen(cmd->u.tc_start.ts_conds_str) + 1);
+}
+
+#define NRS_TBF_DISJUNCTION_DELIM (',')
+#define NRS_TBF_CONJUNCTION_DELIM ('&')
+#define NRS_TBF_EXPRESSION_DELIM ('=')
+
+static inline bool
+nrs_tbf_check_field(struct cfs_lstr *field, char *str)
+{
+ int len = strlen(str);
+
+ return (field->ls_len == len &&
+ strncmp(field->ls_str, str, len) == 0);
+}
+
+static int
+nrs_tbf_opcode_list_parse(char *str, int len, struct cfs_bitmap **bitmaptr);
+
+static int
+nrs_tbf_expression_parse(struct cfs_lstr *src, struct list_head *cond_list)
+{
+ struct nrs_tbf_expression *expr;
+ struct cfs_lstr field;
+ int rc = 0;
+
+ OBD_ALLOC(expr, sizeof(struct nrs_tbf_expression));
+ if (expr == NULL)
+ return -ENOMEM;
+
+ rc = cfs_gettok(src, NRS_TBF_EXPRESSION_DELIM, &field);
+ if (rc == 0 || src->ls_len <= 2 || src->ls_str[0] != '{' ||
+ src->ls_str[src->ls_len - 1] != '}')
+ GOTO(out, rc = -EINVAL);
+
+ /* Skip '{' and '}' */
+ src->ls_str++;
+ src->ls_len -= 2;
+
+ if (nrs_tbf_check_field(&field, "nid")) {
+ if (cfs_parse_nidlist(src->ls_str,
+ src->ls_len,
+ &expr->te_cond) <= 0)
+ GOTO(out, rc = -EINVAL);
+ expr->te_field = NRS_TBF_FIELD_NID;
+ } else if (nrs_tbf_check_field(&field, "jobid")) {
+ if (nrs_tbf_jobid_list_parse(src->ls_str,
+ src->ls_len,
+ &expr->te_cond) < 0)
+ GOTO(out, rc = -EINVAL);
+ expr->te_field = NRS_TBF_FIELD_JOBID;
+ } else if (nrs_tbf_check_field(&field, "opcode")) {
+ if (nrs_tbf_opcode_list_parse(src->ls_str,
+ src->ls_len,
+ &expr->te_opcodes) < 0)
+ GOTO(out, rc = -EINVAL);
+ expr->te_field = NRS_TBF_FIELD_OPCODE;
+ } else
+ GOTO(out, rc = -EINVAL);
+
+ list_add_tail(&expr->te_linkage, cond_list);
+ return 0;
+out:
+ OBD_FREE_PTR(expr);
+ return rc;
+}
+
+static int
+nrs_tbf_conjunction_parse(struct cfs_lstr *src, struct list_head *cond_list)
+{
+ struct nrs_tbf_conjunction *conjunction;
+ struct cfs_lstr expr;
+ int rc = 0;
+
+ OBD_ALLOC(conjunction, sizeof(struct nrs_tbf_conjunction));
+ if (conjunction == NULL)
+ return -ENOMEM;
+
+ INIT_LIST_HEAD(&conjunction->tc_expressions);
+ list_add_tail(&conjunction->tc_linkage, cond_list);
+
+ while (src->ls_str) {
+ rc = cfs_gettok(src, NRS_TBF_CONJUNCTION_DELIM, &expr);
+ if (rc == 0) {
+ rc = -EINVAL;
+ break;
+ }
+ rc = nrs_tbf_expression_parse(&expr,
+ &conjunction->tc_expressions);
+ if (rc)
+ break;
+ }
+ return rc;
+}
+
+static int
+nrs_tbf_conds_parse(char *str, int len, struct list_head *cond_list)
+{
+ struct cfs_lstr src;
+ struct cfs_lstr res;
+ int rc = 0;
+
+ src.ls_str = str;
+ src.ls_len = len;
+ INIT_LIST_HEAD(cond_list);
+ while (src.ls_str) {
+ rc = cfs_gettok(&src, NRS_TBF_DISJUNCTION_DELIM, &res);
+ if (rc == 0) {
+ rc = -EINVAL;
+ break;
+ }
+ rc = nrs_tbf_conjunction_parse(&res, cond_list);
+ if (rc)
+ break;
+ }
+ return rc;
+}
+
+static int
+nrs_tbf_generic_parse(struct nrs_tbf_cmd *cmd, const char *id)
+{
+ int rc;
+
+ OBD_ALLOC(cmd->u.tc_start.ts_conds_str, strlen(id) + 1);
+ if (cmd->u.tc_start.ts_conds_str == NULL)
+ return -ENOMEM;
+
+ memcpy(cmd->u.tc_start.ts_conds_str, id, strlen(id));
+
+ /* Parse hybird NID and JOBID conditions */
+ rc = nrs_tbf_conds_parse(cmd->u.tc_start.ts_conds_str,
+ strlen(cmd->u.tc_start.ts_conds_str),
+ &cmd->u.tc_start.ts_conds);
+ if (rc)
+ nrs_tbf_generic_cmd_fini(cmd);
+
+ return rc;
+}
+
+static int
+nrs_tbf_expression_match(struct nrs_tbf_expression *expr,
+ struct nrs_tbf_rule *rule,
+ struct nrs_tbf_client *cli)
+{
+ switch (expr->te_field) {
+ case NRS_TBF_FIELD_NID:
+ return cfs_match_nid(cli->tc_nid, &expr->te_cond);
+ case NRS_TBF_FIELD_JOBID:
+ return nrs_tbf_jobid_list_match(&expr->te_cond, cli->tc_jobid);
+ case NRS_TBF_FIELD_OPCODE:
+ return cfs_bitmap_check(expr->te_opcodes, cli->tc_opcode);
+ default:
+ return 0;
+ }
+}
+
+static int
+nrs_tbf_conjunction_match(struct nrs_tbf_conjunction *conjunction,
+ struct nrs_tbf_rule *rule,
+ struct nrs_tbf_client *cli)
+{
+ struct nrs_tbf_expression *expr;
+ int matched;
+
+ list_for_each_entry(expr, &conjunction->tc_expressions, te_linkage) {
+ matched = nrs_tbf_expression_match(expr, rule, cli);
+ if (!matched)
+ return 0;
+ }
+
+ return 1;
+}
+
+static int
+nrs_tbf_cond_match(struct nrs_tbf_rule *rule, struct nrs_tbf_client *cli)
+{
+ struct nrs_tbf_conjunction *conjunction;
+ int matched;
+
+ list_for_each_entry(conjunction, &rule->tr_conds, tc_linkage) {
+ matched = nrs_tbf_conjunction_match(conjunction, rule, cli);
+ if (matched)
+ return 1;
+ }
+
+ return 0;
+}
+
+static void
+nrs_tbf_generic_rule_fini(struct nrs_tbf_rule *rule)
+{
+ if (!list_empty(&rule->tr_conds))
+ nrs_tbf_conds_free(&rule->tr_conds);
+ LASSERT(rule->tr_conds_str != NULL);
+ OBD_FREE(rule->tr_conds_str, strlen(rule->tr_conds_str) + 1);
+}
+
+static int
+nrs_tbf_rule_init(struct ptlrpc_nrs_policy *policy,
+ struct nrs_tbf_rule *rule, struct nrs_tbf_cmd *start)
+{
+ int rc = 0;
+
+ LASSERT(start->u.tc_start.ts_conds_str);
+ OBD_ALLOC(rule->tr_conds_str,
+ strlen(start->u.tc_start.ts_conds_str) + 1);
+ if (rule->tr_conds_str == NULL)
+ return -ENOMEM;
+
+ memcpy(rule->tr_conds_str,
+ start->u.tc_start.ts_conds_str,
+ strlen(start->u.tc_start.ts_conds_str));
+
+ INIT_LIST_HEAD(&rule->tr_conds);
+ if (!list_empty(&start->u.tc_start.ts_conds)) {
+ rc = nrs_tbf_conds_parse(rule->tr_conds_str,
+ strlen(rule->tr_conds_str),
+ &rule->tr_conds);
+ }
+ if (rc)
+ nrs_tbf_generic_rule_fini(rule);
+
+ return rc;
+}
+
+static int
+nrs_tbf_generic_rule_dump(struct nrs_tbf_rule *rule, struct seq_file *m)
+{
+ seq_printf(m, "%s %s %llu, ref %d\n", rule->tr_name,
+ rule->tr_conds_str, rule->tr_rpc_rate,
+ atomic_read(&rule->tr_ref) - 1);
+ return 0;
+}
+
+static int
+nrs_tbf_generic_rule_match(struct nrs_tbf_rule *rule,
+ struct nrs_tbf_client *cli)
+{
+ return nrs_tbf_cond_match(rule, cli);
+}
+
+static struct nrs_tbf_ops nrs_tbf_generic_ops = {
+ .o_name = NRS_TBF_TYPE_GENERIC,
+ .o_startup = nrs_tbf_startup,
+ .o_cli_find = nrs_tbf_cli_find,
+ .o_cli_findadd = nrs_tbf_cli_findadd,
+ .o_cli_put = nrs_tbf_cli_put,
+ .o_cli_init = nrs_tbf_generic_cli_init,
+ .o_rule_init = nrs_tbf_rule_init,
+ .o_rule_dump = nrs_tbf_generic_rule_dump,
+ .o_rule_match = nrs_tbf_generic_rule_match,
+ .o_rule_fini = nrs_tbf_generic_rule_fini,
+};
+
+static void nrs_tbf_opcode_rule_fini(struct nrs_tbf_rule *rule)
+{
+ if (rule->tr_opcodes != NULL)
+ CFS_FREE_BITMAP(rule->tr_opcodes);
+
+ LASSERT(rule->tr_opcodes_str != NULL);
+ OBD_FREE(rule->tr_opcodes_str, strlen(rule->tr_opcodes_str) + 1);
+}
+
+static unsigned nrs_tbf_opcode_hop_hash(struct cfs_hash *hs, const void *key,
+ unsigned mask)
+{
+ return cfs_hash_djb2_hash(key, sizeof(__u32), mask);
+}
+
+static int nrs_tbf_opcode_hop_keycmp(const void *key, struct hlist_node *hnode)
+{
+ const __u32 *opc = key;
+ struct nrs_tbf_client *cli = hlist_entry(hnode,
+ struct nrs_tbf_client,
+ tc_hnode);
+
+ return *opc == cli->tc_opcode;
+}
+
+static void *nrs_tbf_opcode_hop_key(struct hlist_node *hnode)
+{
+ struct nrs_tbf_client *cli = hlist_entry(hnode,
+ struct nrs_tbf_client,
+ tc_hnode);
+
+ return &cli->tc_opcode;
+}
+
+static void *nrs_tbf_opcode_hop_object(struct hlist_node *hnode)
+{
+ return hlist_entry(hnode, struct nrs_tbf_client, tc_hnode);
+}
+
+static void nrs_tbf_opcode_hop_get(struct cfs_hash *hs,
+ struct hlist_node *hnode)
+{
+ struct nrs_tbf_client *cli = hlist_entry(hnode,
+ struct nrs_tbf_client,
+ tc_hnode);
+
+ atomic_inc(&cli->tc_ref);
+}
+
+static void nrs_tbf_opcode_hop_put(struct cfs_hash *hs,
+ struct hlist_node *hnode)
+{
+ struct nrs_tbf_client *cli = hlist_entry(hnode,
+ struct nrs_tbf_client,
+ tc_hnode);
+
+ atomic_dec(&cli->tc_ref);
+}
+
+static void nrs_tbf_opcode_hop_exit(struct cfs_hash *hs,
+ struct hlist_node *hnode)
+{
+ struct nrs_tbf_client *cli = hlist_entry(hnode,
+ struct nrs_tbf_client,
+ tc_hnode);
+
+ LASSERTF(atomic_read(&cli->tc_ref) == 0,
+ "Busy TBF object from client with opcode %s, with %d refs\n",
+ ll_opcode2str(cli->tc_opcode),
+ atomic_read(&cli->tc_ref));
+
+ nrs_tbf_cli_fini(cli);
+}
+static struct cfs_hash_ops nrs_tbf_opcode_hash_ops = {
+ .hs_hash = nrs_tbf_opcode_hop_hash,
+ .hs_keycmp = nrs_tbf_opcode_hop_keycmp,
+ .hs_key = nrs_tbf_opcode_hop_key,
+ .hs_object = nrs_tbf_opcode_hop_object,
+ .hs_get = nrs_tbf_opcode_hop_get,
+ .hs_put = nrs_tbf_opcode_hop_put,
+ .hs_put_locked = nrs_tbf_opcode_hop_put,
+ .hs_exit = nrs_tbf_opcode_hop_exit,
+};
+
+static int
+nrs_tbf_opcode_startup(struct ptlrpc_nrs_policy *policy,
+ struct nrs_tbf_head *head)
+{
+ struct nrs_tbf_cmd start = { 0 };
+ int rc;
+
+ head->th_cli_hash = cfs_hash_create("nrs_tbf_hash",
+ NRS_TBF_NID_BITS,
+ NRS_TBF_NID_BITS,
+ NRS_TBF_NID_BKT_BITS, 0,
+ CFS_HASH_MIN_THETA,
+ CFS_HASH_MAX_THETA,
+ &nrs_tbf_opcode_hash_ops,
+ CFS_HASH_RW_BKTLOCK);
+ if (head->th_cli_hash == NULL)
+ return -ENOMEM;
+
+ start.u.tc_start.ts_opcodes = NULL;
+ start.u.tc_start.ts_opcodes_str = "*";
+
+ start.u.tc_start.ts_rpc_rate = tbf_rate;
+ start.u.tc_start.ts_rule_flags = NTRS_DEFAULT;
+ start.tc_name = NRS_TBF_DEFAULT_RULE;
+ rc = nrs_tbf_rule_start(policy, head, &start);
+
+ return rc;
+}
+
+static struct nrs_tbf_client *
+nrs_tbf_opcode_cli_find(struct nrs_tbf_head *head,
+ struct ptlrpc_request *req)
+{
+ __u32 opc;
+
+ opc = lustre_msg_get_opc(req->rq_reqmsg);
+ return cfs_hash_lookup(head->th_cli_hash, &opc);
+}
+
+static struct nrs_tbf_client *
+nrs_tbf_opcode_cli_findadd(struct nrs_tbf_head *head,
+ struct nrs_tbf_client *cli)
+{
+ return cfs_hash_findadd_unique(head->th_cli_hash, &cli->tc_opcode,
+ &cli->tc_hnode);
+}
+
+static void
+nrs_tbf_opcode_cli_init(struct nrs_tbf_client *cli,
+ struct ptlrpc_request *req)
+{
+ cli->tc_opcode = lustre_msg_get_opc(req->rq_reqmsg);
+}
+
+#define MAX_OPCODE_LEN 32
+static int
+nrs_tbf_opcode_set_bit(const struct cfs_lstr *id, struct cfs_bitmap *opcodes)
+{
+ int op = 0;
+ char opcode_str[MAX_OPCODE_LEN];
+
+ if (id->ls_len + 1 > MAX_OPCODE_LEN)
+ return -EINVAL;
+
+ memcpy(opcode_str, id->ls_str, id->ls_len);
+ opcode_str[id->ls_len] = '\0';
+
+ op = ll_str2opcode(opcode_str);
+ if (op < 0)
+ return -EINVAL;
+
+ cfs_bitmap_set(opcodes, op);
+ return 0;
+}
+
+static int
+nrs_tbf_opcode_list_parse(char *str, int len, struct cfs_bitmap **bitmaptr)
+{
+ struct cfs_bitmap *opcodes;
+ struct cfs_lstr src;
+ struct cfs_lstr res;
+ int rc = 0;
+ ENTRY;
+
+ opcodes = CFS_ALLOCATE_BITMAP(LUSTRE_MAX_OPCODES);
+ if (opcodes == NULL)
+ return -ENOMEM;
+
+ src.ls_str = str;
+ src.ls_len = len;
+ while (src.ls_str) {
+ rc = cfs_gettok(&src, ' ', &res);
+ if (rc == 0) {
+ rc = -EINVAL;
+ break;
+ }
+ rc = nrs_tbf_opcode_set_bit(&res, opcodes);
+ if (rc)
+ break;
+ }
+
+ if (rc == 0)
+ *bitmaptr = opcodes;
+ else
+ CFS_FREE_BITMAP(opcodes);
+
+ RETURN(rc);
+}
+
+static void nrs_tbf_opcode_cmd_fini(struct nrs_tbf_cmd *cmd)
+{
+ if (cmd->u.tc_start.ts_opcodes)
+ CFS_FREE_BITMAP(cmd->u.tc_start.ts_opcodes);
+
+ if (cmd->u.tc_start.ts_opcodes_str)
+ OBD_FREE(cmd->u.tc_start.ts_opcodes_str,
+ strlen(cmd->u.tc_start.ts_opcodes_str) + 1);
+
+}
+
+static int nrs_tbf_opcode_parse(struct nrs_tbf_cmd *cmd, char *id)
+{
+ struct cfs_lstr src;
+ int rc;
+
+ src.ls_str = id;
+ src.ls_len = strlen(id);
+ rc = nrs_tbf_check_id_value(&src, "opcode");
+ if (rc)
+ return rc;
+
+ OBD_ALLOC(cmd->u.tc_start.ts_opcodes_str, src.ls_len + 1);
+ if (cmd->u.tc_start.ts_opcodes_str == NULL)
+ return -ENOMEM;
+
+ memcpy(cmd->u.tc_start.ts_opcodes_str, src.ls_str, src.ls_len);
+
+ /* parse opcode list */
+ rc = nrs_tbf_opcode_list_parse(cmd->u.tc_start.ts_opcodes_str,
+ strlen(cmd->u.tc_start.ts_opcodes_str),
+ &cmd->u.tc_start.ts_opcodes);
+ if (rc)
+ nrs_tbf_opcode_cmd_fini(cmd);
+
+ return rc;
+}
+
+static int
+nrs_tbf_opcode_rule_match(struct nrs_tbf_rule *rule,
+ struct nrs_tbf_client *cli)
+{
+ if (rule->tr_opcodes == NULL)
+ return 0;
+
+ return cfs_bitmap_check(rule->tr_opcodes, cli->tc_opcode);
+}
+
+static int nrs_tbf_opcode_rule_init(struct ptlrpc_nrs_policy *policy,
+ struct nrs_tbf_rule *rule,
+ struct nrs_tbf_cmd *start)
+{
+ int rc = 0;
+
+ LASSERT(start->u.tc_start.ts_opcodes_str != NULL);
+ OBD_ALLOC(rule->tr_opcodes_str,
+ strlen(start->u.tc_start.ts_opcodes_str) + 1);
+ if (rule->tr_opcodes_str == NULL)
+ return -ENOMEM;
+
+ strncpy(rule->tr_opcodes_str, start->u.tc_start.ts_opcodes_str,
+ strlen(start->u.tc_start.ts_opcodes_str) + 1);
+
+ /* Default rule '*' */
+ if (start->u.tc_start.ts_opcodes == NULL)
+ return 0;
+
+ rc = nrs_tbf_opcode_list_parse(rule->tr_opcodes_str,
+ strlen(rule->tr_opcodes_str),
+ &rule->tr_opcodes);
+ if (rc)
+ OBD_FREE(rule->tr_opcodes_str,
+ strlen(start->u.tc_start.ts_opcodes_str) + 1);
+
+ return rc;
+}
+
+static int
+nrs_tbf_opcode_rule_dump(struct nrs_tbf_rule *rule, struct seq_file *m)
+{
+ seq_printf(m, "%s {%s} %llu, ref %d\n", rule->tr_name,
+ rule->tr_opcodes_str, rule->tr_rpc_rate,
+ atomic_read(&rule->tr_ref) - 1);
+ return 0;
+}
+
+
+struct nrs_tbf_ops nrs_tbf_opcode_ops = {
+ .o_name = NRS_TBF_TYPE_OPCODE,
+ .o_startup = nrs_tbf_opcode_startup,
+ .o_cli_find = nrs_tbf_opcode_cli_find,
+ .o_cli_findadd = nrs_tbf_opcode_cli_findadd,
+ .o_cli_put = nrs_tbf_nid_cli_put,
+ .o_cli_init = nrs_tbf_opcode_cli_init,
+ .o_rule_init = nrs_tbf_opcode_rule_init,
+ .o_rule_dump = nrs_tbf_opcode_rule_dump,
+ .o_rule_match = nrs_tbf_opcode_rule_match,
+ .o_rule_fini = nrs_tbf_opcode_rule_fini,
+};
+
+static struct nrs_tbf_type nrs_tbf_types[] = {
+ {
+ .ntt_name = NRS_TBF_TYPE_JOBID,
+ .ntt_flag = NRS_TBF_FLAG_JOBID,
+ .ntt_ops = &nrs_tbf_jobid_ops,
+ },
+ {
+ .ntt_name = NRS_TBF_TYPE_NID,
+ .ntt_flag = NRS_TBF_FLAG_NID,
+ .ntt_ops = &nrs_tbf_nid_ops,
+ },
+ {
+ .ntt_name = NRS_TBF_TYPE_OPCODE,
+ .ntt_flag = NRS_TBF_FLAG_OPCODE,
+ .ntt_ops = &nrs_tbf_opcode_ops,
+ },
+ {
+ .ntt_name = NRS_TBF_TYPE_GENERIC,
+ .ntt_flag = NRS_TBF_FLAG_GENERIC,
+ .ntt_ops = &nrs_tbf_generic_ops,
+ },
+};
+
+/**
+ * Is called before the policy transitions into
+ * ptlrpc_nrs_pol_state::NRS_POL_STATE_STARTED; allocates and initializes a
+ * policy-specific private data structure.
+ *
+ * \param[in] policy The policy to start
+ *
+ * \retval -ENOMEM OOM error
+ * \retval 0 success
+ *
+ * \see nrs_policy_register()
+ * \see nrs_policy_ctl()
+ */
+static int nrs_tbf_start(struct ptlrpc_nrs_policy *policy, char *arg)
+{
+ struct nrs_tbf_head *head;
+ struct nrs_tbf_ops *ops;
+ __u32 type;
+ char *name;
+ int found = 0;
+ int i;
+ int rc = 0;
+
+ if (arg == NULL)
+ name = NRS_TBF_TYPE_GENERIC;
+ else if (strlen(arg) < NRS_TBF_TYPE_MAX_LEN)
+ name = arg;
+ else
+ GOTO(out, rc = -EINVAL);
+
+ for (i = 0; i < ARRAY_SIZE(nrs_tbf_types); i++) {
+ if (strcmp(name, nrs_tbf_types[i].ntt_name) == 0) {
+ ops = nrs_tbf_types[i].ntt_ops;
+ type = nrs_tbf_types[i].ntt_flag;
+ found = 1;
+ break;
+ }
+ }
+ if (found == 0)
+ GOTO(out, rc = -ENOTSUPP);
+
+ OBD_CPT_ALLOC_PTR(head, nrs_pol2cptab(policy), nrs_pol2cptid(policy));
+ if (head == NULL)
+ GOTO(out, rc = -ENOMEM);
+
+ memcpy(head->th_type, name, strlen(name));
+ head->th_type[strlen(name)] = '\0';
+ head->th_ops = ops;
+ head->th_type_flag = type;
+
+ head->th_binheap = cfs_binheap_create(&nrs_tbf_heap_ops,
+ CBH_FLAG_ATOMIC_GROW, 4096, NULL,
+ nrs_pol2cptab(policy),
+ nrs_pol2cptid(policy));
+ if (head->th_binheap == NULL)
+ GOTO(out_free_head, rc = -ENOMEM);
+
+ atomic_set(&head->th_rule_sequence, 0);
+ spin_lock_init(&head->th_rule_lock);
+ INIT_LIST_HEAD(&head->th_list);
+ hrtimer_init(&head->th_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
+ head->th_timer.function = nrs_tbf_timer_cb;
+ rc = head->th_ops->o_startup(policy, head);
+ if (rc)
+ GOTO(out_free_heap, rc);
+
+ policy->pol_private = head;
+ return 0;
+out_free_heap:
+ cfs_binheap_destroy(head->th_binheap);
+out_free_head:
+ OBD_FREE_PTR(head);
+out:
+ return rc;
+}
+
+/**
+ * Is called before the policy transitions into
+ * ptlrpc_nrs_pol_state::NRS_POL_STATE_STOPPED; deallocates the policy-specific
+ * private data structure.
+ *
+ * \param[in] policy The policy to stop
+ *
+ * \see nrs_policy_stop0()
+ */
+static void nrs_tbf_stop(struct ptlrpc_nrs_policy *policy)
+{
+ struct nrs_tbf_head *head = policy->pol_private;
+ struct ptlrpc_nrs *nrs = policy->pol_nrs;
+ struct nrs_tbf_rule *rule, *n;
+
+ LASSERT(head != NULL);
+ LASSERT(head->th_cli_hash != NULL);
+ hrtimer_cancel(&head->th_timer);
+ /* Should cleanup hash first before free rules */
+ cfs_hash_putref(head->th_cli_hash);
+ list_for_each_entry_safe(rule, n, &head->th_list, tr_linkage) {
+ list_del_init(&rule->tr_linkage);
+ nrs_tbf_rule_put(rule);
+ }
+ LASSERT(list_empty(&head->th_list));
+ LASSERT(head->th_binheap != NULL);
+ LASSERT(cfs_binheap_is_empty(head->th_binheap));
+ cfs_binheap_destroy(head->th_binheap);
+ OBD_FREE_PTR(head);
+ nrs->nrs_throttling = 0;
+ wake_up(&policy->pol_nrs->nrs_svcpt->scp_waitq);
+}
+
+/**
+ * Performs a policy-specific ctl function on TBF policy instances; similar
+ * to ioctl.
+ *
+ * \param[in] policy the policy instance
+ * \param[in] opc the opcode
+ * \param[in,out] arg used for passing parameters and information
+ *
+ * \pre assert_spin_locked(&policy->pol_nrs->->nrs_lock)
+ * \post assert_spin_locked(&policy->pol_nrs->->nrs_lock)
+ *
+ * \retval 0 operation carried out successfully
+ * \retval -ve error
+ */
+static int nrs_tbf_ctl(struct ptlrpc_nrs_policy *policy,
+ enum ptlrpc_nrs_ctl opc,
+ void *arg)
+{
+ int rc = 0;
+ ENTRY;
+
+ assert_spin_locked(&policy->pol_nrs->nrs_lock);
+
+ switch ((enum nrs_ctl_tbf)opc) {
+ default:
+ RETURN(-EINVAL);
+
+ /**
+ * Read RPC rate size of a policy instance.
+ */
+ case NRS_CTL_TBF_RD_RULE: {
+ struct nrs_tbf_head *head = policy->pol_private;
+ struct seq_file *m = (struct seq_file *) arg;
+ struct ptlrpc_service_part *svcpt;
+
+ svcpt = policy->pol_nrs->nrs_svcpt;
+ seq_printf(m, "CPT %d:\n", svcpt->scp_cpt);
+
+ rc = nrs_tbf_rule_dump_all(head, m);
+ }
+ break;
+
+ /**
+ * Write RPC rate of a policy instance.
+ */
+ case NRS_CTL_TBF_WR_RULE: {
+ struct nrs_tbf_head *head = policy->pol_private;
+ struct nrs_tbf_cmd *cmd;
+
+ cmd = (struct nrs_tbf_cmd *)arg;
+ rc = nrs_tbf_command(policy,
+ head,
+ cmd);
+ }
+ break;
+ /**
+ * Read the TBF policy type of a policy instance.
+ */
+ case NRS_CTL_TBF_RD_TYPE_FLAG: {
+ struct nrs_tbf_head *head = policy->pol_private;
+
+ *(__u32 *)arg = head->th_type_flag;
+ }
+ break;
+ }
+
+ RETURN(rc);
+}
+
+/**
+ * Is called for obtaining a TBF policy resource.
+ *
+ * \param[in] policy The policy on which the request is being asked for
+ * \param[in] nrq The request for which resources are being taken
+ * \param[in] parent Parent resource, unused in this policy
+ * \param[out] resp Resources references are placed in this array
+ * \param[in] moving_req Signifies limited caller context; unused in this
+ * policy
+ *
+ *
+ * \see nrs_resource_get_safe()
+ */
+static int nrs_tbf_res_get(struct ptlrpc_nrs_policy *policy,
+ struct ptlrpc_nrs_request *nrq,
+ const struct ptlrpc_nrs_resource *parent,
+ struct ptlrpc_nrs_resource **resp,
+ bool moving_req)
+{
+ struct nrs_tbf_head *head;
+ struct nrs_tbf_client *cli;
+ struct nrs_tbf_client *tmp;
+ struct ptlrpc_request *req;
+
+ if (parent == NULL) {
+ *resp = &((struct nrs_tbf_head *)policy->pol_private)->th_res;
+ return 0;
+ }
+
+ head = container_of(parent, struct nrs_tbf_head, th_res);
+ req = container_of(nrq, struct ptlrpc_request, rq_nrq);
+ cli = head->th_ops->o_cli_find(head, req);
+ if (cli != NULL) {
+ spin_lock(&policy->pol_nrs->nrs_svcpt->scp_req_lock);
+ LASSERT(cli->tc_rule);
+ if (cli->tc_rule_sequence !=
+ atomic_read(&head->th_rule_sequence) ||
+ cli->tc_rule->tr_flags & NTRS_STOPPING) {
+ struct nrs_tbf_rule *rule;
+
+ CDEBUG(D_RPCTRACE,
+ "TBF class@%p rate %llu sequence %d, "
+ "rule flags %d, head sequence %d\n",
+ cli, cli->tc_rpc_rate,
+ cli->tc_rule_sequence,
+ cli->tc_rule->tr_flags,
+ atomic_read(&head->th_rule_sequence));
+ rule = nrs_tbf_rule_match(head, cli);
+ if (rule != cli->tc_rule) {
+ nrs_tbf_cli_reset(head, rule, cli);
+ } else {
+ if (cli->tc_rule_generation != rule->tr_generation)
+ nrs_tbf_cli_reset_value(head, cli);
nrs_tbf_rule_put(rule);
+ }
} else if (cli->tc_rule_generation !=
cli->tc_rule->tr_generation) {
nrs_tbf_cli_reset_value(head, cli);
sizeof(*cli), moving_req ? GFP_ATOMIC : __GFP_IO);
if (cli == NULL)
return -ENOMEM;
+
nrs_tbf_cli_init(head, cli, req);
tmp = head->th_ops->o_cli_findadd(head, cli);
if (tmp != cli) {
&cli->tc_node);
}
CDEBUG(D_RPCTRACE,
- "NRS start %s request from %s, "
- "seq: %llu\n",
- policy->pol_desc->pd_name,
- libcfs_id2str(req->rq_peer),
- nrq->nr_u.tbf.tr_sequence);
+ "TBF dequeues: class@%p rate %llu gen %llu "
+ "token %llu, rule@%p rate %llu gen %llu\n",
+ cli, cli->tc_rpc_rate,
+ cli->tc_rule_generation, cli->tc_ntoken,
+ cli->tc_rule, cli->tc_rule->tr_rpc_rate,
+ cli->tc_rule->tr_generation);
} else {
ktime_t time;
list_add_tail(&nrq->nr_u.tbf.tr_list,
&cli->tc_list);
}
+
+ if (rc == 0)
+ CDEBUG(D_RPCTRACE,
+ "TBF enqueues: class@%p rate %llu gen %llu "
+ "token %llu, rule@%p rate %llu gen %llu\n",
+ cli, cli->tc_rpc_rate,
+ cli->tc_rule_generation, cli->tc_ntoken,
+ cli->tc_rule, cli->tc_rule->tr_rpc_rate,
+ cli->tc_rule->tr_generation);
+
return rc;
}
{
int rc;
- if (cmd->u.tc_start.ts_valid_type & NRS_TBF_FLAG_JOBID)
+ switch (cmd->u.tc_start.ts_valid_type) {
+ case NRS_TBF_FLAG_JOBID:
rc = nrs_tbf_jobid_parse(cmd, token);
- else if (cmd->u.tc_start.ts_valid_type & NRS_TBF_FLAG_NID)
+ break;
+ case NRS_TBF_FLAG_NID:
rc = nrs_tbf_nid_parse(cmd, token);
- else if (cmd->u.tc_start.ts_valid_type == NRS_TBF_FLAG_INVALID)
- rc = -EINVAL;
- else
- rc = 0;
+ break;
+ case NRS_TBF_FLAG_OPCODE:
+ rc = nrs_tbf_opcode_parse(cmd, token);
+ break;
+ case NRS_TBF_FLAG_GENERIC:
+ rc = nrs_tbf_generic_parse(cmd, token);
+ break;
+ default:
+ RETURN(-EINVAL);
+ }
return rc;
}
-
static void nrs_tbf_cmd_fini(struct nrs_tbf_cmd *cmd)
{
if (cmd->tc_cmd == NRS_CTL_TBF_START_RULE) {
- if (cmd->u.tc_start.ts_valid_type & NRS_TBF_FLAG_JOBID)
+ if (cmd->u.tc_start.ts_valid_type == NRS_TBF_FLAG_JOBID)
nrs_tbf_jobid_cmd_fini(cmd);
- else if (cmd->u.tc_start.ts_valid_type & NRS_TBF_FLAG_NID)
+ else if (cmd->u.tc_start.ts_valid_type == NRS_TBF_FLAG_NID)
nrs_tbf_nid_cmd_fini(cmd);
+ else if (cmd->u.tc_start.ts_valid_type == NRS_TBF_FLAG_OPCODE)
+ nrs_tbf_opcode_cmd_fini(cmd);
+ else if (cmd->u.tc_start.ts_valid_type == NRS_TBF_FLAG_GENERIC)
+ nrs_tbf_generic_cmd_fini(cmd);
}
}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff