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Merge pull request #5569 from maximebedard/backport-4497

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Backport #4497 to redis 4
This commit is contained in:
Salvatore Sanfilippo 2018-11-22 11:12:36 +01:00 committed by GitHub
commit 97192e2d88
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3 changed files with 19 additions and 5 deletions
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20
src/networking.c
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@ -67,6 +67,16 @@ int listMatchObjects(void *a, void *b) {
return equalStringObjects(a,b);
}
/* This function links the client to the global linked list of clients.
* unlinkClient() does the opposite, among other things. */
void linkClient(client *c) {
listAddNodeTail(server.clients,c);
/* Note that we remember the linked list node where the client is stored,
* this way removing the client in unlinkClient() will not require
* a linear scan, but just a constant time operation. */
c->client_list_node = listLast(server.clients);
}
client *createClient(int fd) {
client *c = zmalloc(sizeof(client));
@ -133,9 +143,10 @@ client *createClient(int fd) {
c->pubsub_channels = dictCreate(&objectKeyPointerValueDictType,NULL);
c->pubsub_patterns = listCreate();
c->peerid = NULL;
c->client_list_node = NULL;
listSetFreeMethod(c->pubsub_patterns,decrRefCountVoid);
listSetMatchMethod(c->pubsub_patterns,listMatchObjects);
if (fd != -1) listAddNodeTail(server.clients,c);
if (fd != -1) linkClient(c);
initClientMultiState(c);
return c;
}
@ -752,9 +763,10 @@ void unlinkClient(client *c) {
* fd is already set to -1. */
if (c->fd != -1) {
/* Remove from the list of active clients. */
ln = listSearchKey(server.clients,c);
serverAssert(ln != NULL);
listDelNode(server.clients,ln);
if (c->client_list_node) {
listDelNode(server.clients,c->client_list_node);
c->client_list_node = NULL;
}
/* Unregister async I/O handlers and close the socket. */
aeDeleteFileEvent(server.el,c->fd,AE_READABLE);

2
src/replication.c
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@ -2226,7 +2226,7 @@ void replicationResurrectCachedMaster(int newfd) {
server.repl_down_since = 0;
/* Re-add to the list of clients. */
listAddNodeTail(server.clients,server.master);
linkClient(server.master);
if (aeCreateFileEvent(server.el, newfd, AE_READABLE,
readQueryFromClient, server.master)) {
serverLog(LL_WARNING,"Error resurrecting the cached master, impossible to add the readable handler: %s", strerror(errno));

2
src/server.h
View File

@ -723,6 +723,7 @@ typedef struct client {
dict *pubsub_channels; /* channels a client is interested in (SUBSCRIBE) */
list *pubsub_patterns; /* patterns a client is interested in (SUBSCRIBE) */
sds peerid; /* Cached peer ID. */
listNode *client_list_node; /* list node in client list */
/* Response buffer */
int bufpos;
@ -1393,6 +1394,7 @@ int handleClientsWithPendingWrites(void);
int clientHasPendingReplies(client *c);
void unlinkClient(client *c);
int writeToClient(int fd, client *c, int handler_installed);
void linkClient(client *c);
#ifdef __GNUC__
void addReplyErrorFormat(client *c, const char *fmt, ...)