tools/xenstore: add current connection to domain_memory_add() parameters

In order to enable switching memory accounting to the generic array based accounting, add the current connection to the parameters of domain_memory_add(). This requires to add the connection to some other functions, too. Signed-off-by: Juergen Gross <[email protected]> Acked-by: Julien Grall <[email protected]>
vireshk · Jun 7, 2023 · d074023 · d074023
1 parent a4ffaa0
commit d074023
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Showing 4 changed files with 33 additions and 23 deletions.
diff --git a/tools/xenstore/xenstored_core.c b/tools/xenstore/xenstored_core.c
@@ -246,7 +246,8 @@ static void free_buffered_data(struct buffered_data *out,
 		}
 	}
 
-	domain_memory_add_nochk(conn->id, -out->hdr.msg.len - sizeof(out->hdr));
+	domain_memory_add_nochk(conn, conn->id,
+				-out->hdr.msg.len - sizeof(out->hdr));
 
 	if (out->hdr.msg.type == XS_WATCH_EVENT) {
 		req = out->pend.req;
@@ -631,24 +632,25 @@ int do_tdb_write(struct connection *conn, TDB_DATA *key, TDB_DATA *data,
 	 * nodes to new owners.
 	 */
 	if (old_acc.memory)
-		domain_memory_add_nochk(old_domid,
+		domain_memory_add_nochk(conn, old_domid,
 					-old_acc.memory - key->dsize);
-	ret = domain_memory_add(new_domid, data->dsize + key->dsize,
-				no_quota_check);
+	ret = domain_memory_add(conn, new_domid,
+				data->dsize + key->dsize, no_quota_check);
 	if (ret) {
 		/* Error path, so no quota check. */
 		if (old_acc.memory)
-			domain_memory_add_nochk(old_domid,
+			domain_memory_add_nochk(conn, old_domid,
 						old_acc.memory + key->dsize);
 		return ret;
 	}
 
 	/* TDB should set errno, but doesn't even set ecode AFAICT. */
 	if (tdb_store(tdb_ctx, *key, *data, TDB_REPLACE) != 0) {
-		domain_memory_add_nochk(new_domid, -data->dsize - key->dsize);
+		domain_memory_add_nochk(conn, new_domid,
+					-data->dsize - key->dsize);
 		/* Error path, so no quota check. */
 		if (old_acc.memory)
-			domain_memory_add_nochk(old_domid,
+			domain_memory_add_nochk(conn, old_domid,
 						old_acc.memory + key->dsize);
 		errno = EIO;
 		return errno;
@@ -683,7 +685,7 @@ int do_tdb_delete(struct connection *conn, TDB_DATA *key,
 
 	if (acc->memory) {
 		domid = get_acc_domid(conn, key, acc->domid);
-		domain_memory_add_nochk(domid, -acc->memory - key->dsize);
+		domain_memory_add_nochk(conn, domid, -acc->memory - key->dsize);
 	}
 
 	return 0;
@@ -1055,11 +1057,13 @@ void send_reply(struct connection *conn, enum xsd_sockmsg_type type,
 	if (len <= DEFAULT_BUFFER_SIZE) {
 		bdata->buffer = bdata->default_buffer;
 		/* Don't check quota, path might be used for returning error. */
-		domain_memory_add_nochk(conn->id, len + sizeof(bdata->hdr));
+		domain_memory_add_nochk(conn, conn->id,
+					len + sizeof(bdata->hdr));
 	} else {
 		bdata->buffer = talloc_array(bdata, char, len);
 		if (!bdata->buffer ||
-		    domain_memory_add_chk(conn->id, len + sizeof(bdata->hdr))) {
+		    domain_memory_add_chk(conn, conn->id,
+					  len + sizeof(bdata->hdr))) {
 			send_error(conn, ENOMEM);
 			return;
 		}
@@ -1124,7 +1128,7 @@ void send_event(struct buffered_data *req, struct connection *conn,
 		}
 	}
 
-	if (domain_memory_add_chk(conn->id, len + sizeof(bdata->hdr))) {
+	if (domain_memory_add_chk(conn, conn->id, len + sizeof(bdata->hdr))) {
 		talloc_free(bdata);
 		return;
 	}
@@ -3332,7 +3336,7 @@ static void add_buffered_data(struct buffered_data *bdata,
 	 * be smaller. So ignore it. The limit will be applied for any resource
 	 * after the state has been fully restored.
 	 */
-	domain_memory_add_nochk(conn->id, len + sizeof(bdata->hdr));
+	domain_memory_add_nochk(conn, conn->id, len + sizeof(bdata->hdr));
 }
 
 void read_state_buffered_data(const void *ctx, struct connection *conn,

diff --git a/tools/xenstore/xenstored_domain.c b/tools/xenstore/xenstored_domain.c
@@ -1235,7 +1235,8 @@ static bool domain_chk_quota(struct domain *domain, int mem)
 	return false;
 }
 
-int domain_memory_add(unsigned int domid, int mem, bool no_quota_check)
+int domain_memory_add(struct connection *conn, unsigned int domid, int mem,
+		      bool no_quota_check)
 {
 	struct domain *domain;
 

diff --git a/tools/xenstore/xenstored_domain.h b/tools/xenstore/xenstored_domain.h
@@ -81,25 +81,29 @@ int domain_nbentry_inc(struct connection *conn, unsigned int domid);
 int domain_nbentry_dec(struct connection *conn, unsigned int domid);
 int domain_nbentry_fix(unsigned int domid, int num, bool update);
 unsigned int domain_nbentry(struct connection *conn);
-int domain_memory_add(unsigned int domid, int mem, bool no_quota_check);
+int domain_memory_add(struct connection *conn, unsigned int domid, int mem,
+		      bool no_quota_check);
 
 /*
  * domain_memory_add_chk(): to be used when memory quota should be checked.
  * Not to be used when specifying a negative mem value, as lowering the used
  * memory should always be allowed.
  */
-static inline int domain_memory_add_chk(unsigned int domid, int mem)
+static inline int domain_memory_add_chk(struct connection *conn,
+					unsigned int domid, int mem)
 {
-	return domain_memory_add(domid, mem, false);
+	return domain_memory_add(conn, domid, mem, false);
 }
+
 /*
  * domain_memory_add_nochk(): to be used when memory quota should not be
  * checked, e.g. when lowering memory usage, or in an error case for undoing
  * a previous memory adjustment.
  */
-static inline void domain_memory_add_nochk(unsigned int domid, int mem)
+static inline void domain_memory_add_nochk(struct connection *conn,
+					   unsigned int domid, int mem)
 {
-	domain_memory_add(domid, mem, true);
+	domain_memory_add(conn, domid, mem, true);
 }
 void domain_watch_inc(struct connection *conn);
 void domain_watch_dec(struct connection *conn);

diff --git a/tools/xenstore/xenstored_watch.c b/tools/xenstore/xenstored_watch.c
@@ -199,7 +199,7 @@ static struct watch *add_watch(struct connection *conn, char *path, char *token,
 	watch->token = talloc_strdup(watch, token);
 	if (!watch->node || !watch->token)
 		goto nomem;
-	if (domain_memory_add(conn->id, strlen(path) + strlen(token),
+	if (domain_memory_add(conn, conn->id, strlen(path) + strlen(token),
 			      no_quota_check))
 		goto nomem;
 
@@ -274,8 +274,9 @@ int do_unwatch(const void *ctx, struct connection *conn,
 	list_for_each_entry(watch, &conn->watches, list) {
 		if (streq(watch->node, node) && streq(watch->token, vec[1])) {
 			list_del(&watch->list);
-			domain_memory_add_nochk(conn->id, -strlen(watch->node) -
-							  strlen(watch->token));
+			domain_memory_add_nochk(conn, conn->id,
+						-strlen(watch->node) -
+						strlen(watch->token));
 			talloc_free(watch);
 			domain_watch_dec(conn);
 			send_ack(conn, XS_UNWATCH);
@@ -291,8 +292,8 @@ void conn_delete_all_watches(struct connection *conn)
 
 	while ((watch = list_top(&conn->watches, struct watch, list))) {
 		list_del(&watch->list);
-		domain_memory_add_nochk(conn->id, -strlen(watch->node) -
-						  strlen(watch->token));
+		domain_memory_add_nochk(conn, conn->id, -strlen(watch->node) -
+							strlen(watch->token));
 		talloc_free(watch);
 		domain_watch_dec(conn);
 	}