void renameGenericCommand(redisClient *c, int nx) {
robj *o;
long long expire;
/* To use the same key as src and dst is probably an error */
if (sdscmp(c->argv[1]->ptr,c->argv[2]->ptr) == 0) {
addReply(c,shared.sameobjecterr);
return;
}
if ((o = lookupKeyWriteOrReply(c,c->argv[1],shared.nokeyerr)) == NULL)
return;
incrRefCount(o);
expire = getExpire(c->db,c->argv[1]);
if (lookupKeyWrite(c->db,c->argv[2]) != NULL) {
if (nx) {
decrRefCount(o);
addReply(c,shared.czero);
return;
}
/* Overwrite: delete the old key before creating the new one with the same name. */
dbDelete(c->db,c->argv[2]);
}
dbAdd(c->db,c->argv[2],o);
if (expire != -1) setExpire(c->db,c->argv[2],expire);
dbDelete(c->db,c->argv[1]);
signalModifiedKey(c->db,c->argv[1]);
signalModifiedKey(c->db,c->argv[2]);
server.dirty++;
addReply(c,nx ? shared.cone : shared.ok);
}
int expireIfNeeded(redisDb *db, robj *key) {
long long when = getExpire(db,key);
if (when < 0) return 0; /* No expire for this key */
/* Don't expire anything while loading. It will be done later. */
if (server.loading) return 0;
/* If we are running in the context of a slave, return ASAP:
* the slave key expiration is controlled by the master that will
* send us synthesized DEL operations for expired keys.
*
* Still we try to return the right information to the caller,
* that is, 0 if we think the key should be still valid, 1 if
* we think the key is expired at this time. */
if (server.masterhost != NULL) {
return mstime() > when;
}
/* Return when this key has not expired */
if (mstime() <= when) return 0;
/* Delete the key */
server.stat_expiredkeys++;
propagateExpire(db,key);
return dbDelete(db,key);
}
int expireIfNeeded(redisDb *db, robj *key) {
mstime_t when = getExpire(db,key);
mstime_t now;
if (when < 0) return 0; /* No expire for this key */
/* Don't expire anything while loading. It will be done later. */
if (server.loading) return 0;
/* If we are in the context of a Lua script, we claim that time is
* blocked to when the Lua script started. This way a key can expire
* only the first time it is accessed and not in the middle of the
* script execution, making propagation to slaves / AOF consistent.
* See issue #1525 on Github for more information. */
now = server.lua_caller ? server.lua_time_start : mstime();
/* If we are running in the context of a slave, return ASAP:
* the slave key expiration is controlled by the master that will
* send us synthesized DEL operations for expired keys.
*
* Still we try to return the right information to the caller,
* that is, 0 if we think the key should be still valid, 1 if
* we think the key is expired at this time. */
if (server.masterhost != NULL) return now > when;
/* Return when this key has not expired */
if (now <= when) return 0;
/* Delete the key */
server.stat_expiredkeys++;
propagateExpire(db,key);
notifyKeyspaceEvent(NOTIFY_EXPIRED,
"expired",key,db->id);
return dbDelete(db,key);
}
void ttlCommand(redisClient *c) {
time_t expire, ttl = -1;
expire = getExpire(c->db,c->argv[1]);
if (expire != -1) {
ttl = (expire-time(NULL));
if (ttl < 0) ttl = -1;
}
addReplyLongLong(c,(long long)ttl);
}
void moveCommand(client *c) {
robj *o;
redisDb *src, *dst;
int srcid;
long long dbid, expire;
if (server.cluster_enabled) {
addReplyError(c,"MOVE is not allowed in cluster mode");
return;
}
/* Obtain source and target DB pointers */
src = c->db;
srcid = c->db->id;
if (getLongLongFromObject(c->argv[2],&dbid) == C_ERR ||
dbid < INT_MIN || dbid > INT_MAX ||
selectDb(c,dbid) == C_ERR)
{
addReply(c,shared.outofrangeerr);
return;
}
dst = c->db;
selectDb(c,srcid); /* Back to the source DB */
/* If the user is moving using as target the same
* DB as the source DB it is probably an error. */
if (src == dst) {
addReply(c,shared.sameobjecterr);
return;
}
/* Check if the element exists and get a reference */
o = lookupKeyWrite(c->db,c->argv[1]);
if (!o) {
addReply(c,shared.czero);
return;
}
expire = getExpire(c->db,c->argv[1]);
/* Return zero if the key already exists in the target DB */
if (lookupKeyWrite(dst,c->argv[1]) != NULL) {
addReply(c,shared.czero);
return;
}
dbAdd(dst,c->argv[1],o);
if (expire != -1) setExpire(dst,c->argv[1],expire);
incrRefCount(o);
/* OK! key moved, free the entry in the source DB */
dbDelete(src,c->argv[1]);
server.dirty++;
addReply(c,shared.cone);
}
void ttlCommand(redisClient *c) {
time_t expire, ttl = -1;
if (server.ds_enabled) lookupKeyRead(c->db,c->argv[1]);
expire = getExpire(c->db,c->argv[1]);
if (expire != -1) {
ttl = (expire-time(NULL));
if (ttl < 0) ttl = -1;
}
addReplyLongLong(c,(long long)ttl);
}
void ttlGenericCommand(redisClient *c, int output_ms) {
long long expire, ttl = -1;
expire = getExpire(c->db,c->argv[1]);
if (expire != -1) {
ttl = expire-mstime();
if (ttl < 0) ttl = -1;
}
if (ttl == -1) {
addReplyLongLong(c,-1);
} else {
addReplyLongLong(c,output_ms ? ttl : ((ttl+500)/1000));
}
}
int expireIfNeeded(memoryDb *db, sds *key) {
mstime_t when = getExpire(db, key);
mstime_t now;
if (when < 0)
return 0; /* No expire for this key */
/* Return when this key has not expired */
if (now <= when)
return 0;
/* Delete the key */
stats.expiredkeys++;
return dbDelete(db, key);
}
void renameGenericCommand(client *c, int nx) {
robj *o;
long long expire;
int samekey = 0;
/* When source and dest key is the same, no operation is performed,
* if the key exists, however we still return an error on unexisting key. */
if (sdscmp(c->argv[1]->ptr,c->argv[2]->ptr) == 0) samekey = 1;
if ((o = lookupKeyWriteOrReply(c,c->argv[1],shared.nokeyerr)) == NULL)
return;
if (samekey) {
addReply(c,nx ? shared.czero : shared.ok);
return;
}
incrRefCount(o);
expire = getExpire(c->db,c->argv[1]);
if (lookupKeyWrite(c->db,c->argv[2]) != NULL) {
if (nx) {
decrRefCount(o);
addReply(c,shared.czero);
return;
}
/* Overwrite: delete the old key before creating the new one
* with the same name. */
dbDelete(c->db,c->argv[2]);
}
dbAdd(c->db,c->argv[2],o);
if (expire != -1) setExpire(c->db,c->argv[2],expire);
dbDelete(c->db,c->argv[1]);
signalModifiedKey(c->db,c->argv[1]);
signalModifiedKey(c->db,c->argv[2]);
notifyKeyspaceEvent(NOTIFY_GENERIC,"rename_from",
c->argv[1],c->db->id);
notifyKeyspaceEvent(NOTIFY_GENERIC,"rename_to",
c->argv[2],c->db->id);
server.dirty++;
addReply(c,nx ? shared.cone : shared.ok);
}
void ttlGenericCommand(client *c, int output_ms) {
long long expire, ttl = -1;
/* If the key does not exist at all, return -2 */
if (lookupKeyRead(c->db,c->argv[1]) == NULL) {
addReplyLongLong(c,-2);
return;
}
/* The key exists. Return -1 if it has no expire, or the actual
* TTL value otherwise. */
expire = getExpire(c->db,c->argv[1]);
if (expire != -1) {
ttl = expire-mstime();
if (ttl < 0) ttl = 0;
}
if (ttl == -1) {
addReplyLongLong(c,-1);
} else {
addReplyLongLong(c,output_ms ? ttl : ((ttl+500)/1000));
}
}
void ttlCommand(redisClient *c) {
time_t expire, ttl = -1;
expire = getExpire(c->db,c->argv[1]);
if (expire != -1) {
ttl = (expire-time(NULL));
if (ttl < 0) ttl = -1;
} else if (dbExists(c->db, c->argv[1]) == 0) {
//mean not exist
c->retvalue.llnum = (long long)ttl;
if (c->retvalue.llnum == -1) {
c->retvalue.llnum = 0;
}
c->returncode = REDIS_OK_NOT_EXIST;
return;
}
c->retvalue.llnum = (long long)ttl;
if (c->retvalue.llnum == -1) {
c->retvalue.llnum = 0;
}
c->returncode = REDIS_OK;
}
int expireIfNeeded(redisDb *db, robj *key) {
uint16_t logiclock = getLogiClock(db, key);
if (logiclock == 0) {
return 0;
}
if (db->logiclock > logiclock) {
/* Delete the key */
db->need_remove_key--;
db->stat_expiredkeys++;
return dbDelete(db,key);
}
time_t when = getExpire(db,key);
if (when < 0) return 0; /* No expire for this key */
/* Return when this key has not expired */
if (time(NULL) <= when) return 0;
/* Delete the key */
db->stat_expiredkeys++;
return dbDelete(db,key);
}
/* Write a sequence of commands able to fully rebuild the dataset into
* "filename". Used both by REWRITEAOF and BGREWRITEAOF.
*
* In order to minimize the number of commands needed in the rewritten
* log Redis uses variadic commands when possible, such as RPUSH, SADD
* and ZADD. However at max REDIS_AOF_REWRITE_ITEMS_PER_CMD items per time
* are inserted using a single command. */
int rewriteAppendOnlyFile(char *filename) {
dictIterator *di = NULL;
dictEntry *de;
rio aof;
FILE *fp;
char tmpfile[256];
int j;
long long now = mstime();
/* Note that we have to use a different temp name here compared to the
* one used by rewriteAppendOnlyFileBackground() function. */
snprintf(tmpfile,256,"temp-rewriteaof-%d.aof", (int) getpid());
fp = fopen(tmpfile,"w");
if (!fp) {
redisLog(REDIS_WARNING, "Opening the temp file for AOF rewrite in rewriteAppendOnlyFile(): %s", strerror(errno));
return REDIS_ERR;
}
rioInitWithFile(&aof,fp);
for (j = 0; j < server.dbnum; j++) {
char selectcmd[] = "*2\r\n$6\r\nSELECT\r\n";
redisDb *db = server.db+j;
dict *d = db->dict;
if (dictSize(d) == 0) continue;
di = dictGetSafeIterator(d);
if (!di) {
fclose(fp);
return REDIS_ERR;
}
/* SELECT the new DB */
if (rioWrite(&aof,selectcmd,sizeof(selectcmd)-1) == 0) goto werr;
if (rioWriteBulkLongLong(&aof,j) == 0) goto werr;
/* Iterate this DB writing every entry */
while((de = dictNext(di)) != NULL) {
sds keystr;
robj key, *o;
long long expiretime;
keystr = dictGetKey(de);
o = dictGetVal(de);
initStaticStringObject(key,keystr);
expiretime = getExpire(db,&key);
/* Save the key and associated value */
if (o->type == REDIS_STRING) {
/* Emit a SET command */
char cmd[]="*3\r\n$3\r\nSET\r\n";
if (rioWrite(&aof,cmd,sizeof(cmd)-1) == 0) goto werr;
/* Key and value */
if (rioWriteBulkObject(&aof,&key) == 0) goto werr;
if (rioWriteBulkObject(&aof,o) == 0) goto werr;
} else if (o->type == REDIS_LIST) {
if (rewriteListObject(&aof,&key,o) == 0) goto werr;
} else if (o->type == REDIS_SET) {
if (rewriteSetObject(&aof,&key,o) == 0) goto werr;
} else if (o->type == REDIS_ZSET) {
if (rewriteSortedSetObject(&aof,&key,o) == 0) goto werr;
} else if (o->type == REDIS_HASH) {
if (rewriteHashObject(&aof,&key,o) == 0) goto werr;
} else {
redisPanic("Unknown object type");
}
/* Save the expire time */
if (expiretime != -1) {
char cmd[]="*3\r\n$9\r\nPEXPIREAT\r\n";
/* If this key is already expired skip it */
if (expiretime < now) continue;
if (rioWrite(&aof,cmd,sizeof(cmd)-1) == 0) goto werr;
if (rioWriteBulkObject(&aof,&key) == 0) goto werr;
if (rioWriteBulkLongLong(&aof,expiretime) == 0) goto werr;
}
}
dictReleaseIterator(di);
}
/* Make sure data will not remain on the OS's output buffers */
fflush(fp);
aof_fsync(fileno(fp));
fclose(fp);
/* Use RENAME to make sure the DB file is changed atomically only
* if the generate DB file is ok. */
if (rename(tmpfile,filename) == -1) {
redisLog(REDIS_WARNING,"Error moving temp append only file on the final destination: %s", strerror(errno));
unlink(tmpfile);
return REDIS_ERR;
}
redisLog(REDIS_NOTICE,"SYNC append only file rewrite performed");
return REDIS_OK;
werr:
fclose(fp);
unlink(tmpfile);
redisLog(REDIS_WARNING,"Write error writing append only file on disk: %s", strerror(errno));
if (di) dictReleaseIterator(di);
return REDIS_ERR;
}
/* Write a sequence of commands able to fully rebuild the dataset into
* "filename". Used both by REWRITEAOF and BGREWRITEAOF. */
int rewriteAppendOnlyFile(char *filename) {
dictIterator *di = NULL;
dictEntry *de;
FILE *fp;
char tmpfile[256];
int j;
time_t now = time(NULL);
/* Note that we have to use a different temp name here compared to the
* one used by rewriteAppendOnlyFileBackground() function. */
snprintf(tmpfile,256,"temp-rewriteaof-%d.aof", (int) getpid());
fp = fopen(tmpfile,"w");
if (!fp) {
redisLog(REDIS_WARNING, "Failed rewriting the append only file: %s", strerror(errno));
return REDIS_ERR;
}
for (j = 0; j < server.dbnum; j++) {
char selectcmd[] = "*2\r\n$6\r\nSELECT\r\n";
redisDb *db = server.db+j;
dict *d = db->dict;
if (dictSize(d) == 0) continue;
di = dictGetSafeIterator(d);
if (!di) {
fclose(fp);
return REDIS_ERR;
}
/* SELECT the new DB */
if (fwrite(selectcmd,sizeof(selectcmd)-1,1,fp) == 0) goto werr;
if (fwriteBulkLongLong(fp,j) == 0) goto werr;
/* Iterate this DB writing every entry */
while((de = dictNext(di)) != NULL) {
sds keystr = dictGetEntryKey(de);
robj key, *o;
time_t expiretime;
int swapped;
keystr = dictGetEntryKey(de);
o = dictGetEntryVal(de);
initStaticStringObject(key,keystr);
/* If the value for this key is swapped, load a preview in memory.
* We use a "swapped" flag to remember if we need to free the
* value object instead to just increment the ref count anyway
* in order to avoid copy-on-write of pages if we are forked() */
if (!server.vm_enabled || o->storage == REDIS_VM_MEMORY ||
o->storage == REDIS_VM_SWAPPING) {
swapped = 0;
} else {
o = vmPreviewObject(o);
swapped = 1;
}
expiretime = getExpire(db,&key);
/* Save the key and associated value */
if (o->type == REDIS_STRING) {
/* Emit a SET command */
char cmd[]="*3\r\n$3\r\nSET\r\n";
if (fwrite(cmd,sizeof(cmd)-1,1,fp) == 0) goto werr;
/* Key and value */
if (fwriteBulkObject(fp,&key) == 0) goto werr;
if (fwriteBulkObject(fp,o) == 0) goto werr;
} else if (o->type == REDIS_LIST) {
/* Emit the RPUSHes needed to rebuild the list */
char cmd[]="*3\r\n$5\r\nRPUSH\r\n";
if (o->encoding == REDIS_ENCODING_ZIPLIST) {
unsigned char *zl = o->ptr;
unsigned char *p = ziplistIndex(zl,0);
unsigned char *vstr;
unsigned int vlen;
long long vlong;
while(ziplistGet(p,&vstr,&vlen,&vlong)) {
if (fwrite(cmd,sizeof(cmd)-1,1,fp) == 0) goto werr;
if (fwriteBulkObject(fp,&key) == 0) goto werr;
if (vstr) {
if (fwriteBulkString(fp,(char*)vstr,vlen) == 0)
goto werr;
} else {
if (fwriteBulkLongLong(fp,vlong) == 0)
goto werr;
}
p = ziplistNext(zl,p);
}
} else if (o->encoding == REDIS_ENCODING_LINKEDLIST) {
list *list = o->ptr;
listNode *ln;
listIter li;
listRewind(list,&li);
while((ln = listNext(&li))) {
robj *eleobj = listNodeValue(ln);
if (fwrite(cmd,sizeof(cmd)-1,1,fp) == 0) goto werr;
if (fwriteBulkObject(fp,&key) == 0) goto werr;
if (fwriteBulkObject(fp,eleobj) == 0) goto werr;
}
} else {
redisPanic("Unknown list encoding");
}
} else if (o->type == REDIS_SET) {
char cmd[]="*3\r\n$4\r\nSADD\r\n";
/* Emit the SADDs needed to rebuild the set */
if (o->encoding == REDIS_ENCODING_INTSET) {
int ii = 0;
int64_t llval;
while(intsetGet(o->ptr,ii++,&llval)) {
if (fwrite(cmd,sizeof(cmd)-1,1,fp) == 0) goto werr;
if (fwriteBulkObject(fp,&key) == 0) goto werr;
if (fwriteBulkLongLong(fp,llval) == 0) goto werr;
}
} else if (o->encoding == REDIS_ENCODING_HT) {
dictIterator *di = dictGetIterator(o->ptr);
dictEntry *de;
while((de = dictNext(di)) != NULL) {
robj *eleobj = dictGetEntryKey(de);
if (fwrite(cmd,sizeof(cmd)-1,1,fp) == 0) goto werr;
if (fwriteBulkObject(fp,&key) == 0) goto werr;
if (fwriteBulkObject(fp,eleobj) == 0) goto werr;
}
dictReleaseIterator(di);
} else {
redisPanic("Unknown set encoding");
}
} else if (o->type == REDIS_ZSET) {
/* Emit the ZADDs needed to rebuild the sorted set */
char cmd[]="*4\r\n$4\r\nZADD\r\n";
if (o->encoding == REDIS_ENCODING_ZIPLIST) {
unsigned char *zl = o->ptr;
unsigned char *eptr, *sptr;
unsigned char *vstr;
unsigned int vlen;
long long vll;
double score;
eptr = ziplistIndex(zl,0);
redisAssert(eptr != NULL);
sptr = ziplistNext(zl,eptr);
redisAssert(sptr != NULL);
while (eptr != NULL) {
redisAssert(ziplistGet(eptr,&vstr,&vlen,&vll));
score = zzlGetScore(sptr);
if (fwrite(cmd,sizeof(cmd)-1,1,fp) == 0) goto werr;
if (fwriteBulkObject(fp,&key) == 0) goto werr;
if (fwriteBulkDouble(fp,score) == 0) goto werr;
if (vstr != NULL) {
if (fwriteBulkString(fp,(char*)vstr,vlen) == 0)
goto werr;
} else {
if (fwriteBulkLongLong(fp,vll) == 0)
goto werr;
}
zzlNext(zl,&eptr,&sptr);
}
} else if (o->encoding == REDIS_ENCODING_SKIPLIST) {
zset *zs = o->ptr;
dictIterator *di = dictGetIterator(zs->dict);
dictEntry *de;
while((de = dictNext(di)) != NULL) {
robj *eleobj = dictGetEntryKey(de);
double *score = dictGetEntryVal(de);
if (fwrite(cmd,sizeof(cmd)-1,1,fp) == 0) goto werr;
if (fwriteBulkObject(fp,&key) == 0) goto werr;
if (fwriteBulkDouble(fp,*score) == 0) goto werr;
if (fwriteBulkObject(fp,eleobj) == 0) goto werr;
}
dictReleaseIterator(di);
} else {
redisPanic("Unknown sorted set encoding");
}
} else if (o->type == REDIS_HASH) {
char cmd[]="*4\r\n$4\r\nHSET\r\n";
/* Emit the HSETs needed to rebuild the hash */
if (o->encoding == REDIS_ENCODING_ZIPMAP) {
unsigned char *p = zipmapRewind(o->ptr);
unsigned char *field, *val;
unsigned int flen, vlen;
while((p = zipmapNext(p,&field,&flen,&val,&vlen)) != NULL) {
if (fwrite(cmd,sizeof(cmd)-1,1,fp) == 0) goto werr;
if (fwriteBulkObject(fp,&key) == 0) goto werr;
if (fwriteBulkString(fp,(char*)field,flen) == 0)
goto werr;
if (fwriteBulkString(fp,(char*)val,vlen) == 0)
goto werr;
}
} else {
dictIterator *di = dictGetIterator(o->ptr);
dictEntry *de;
while((de = dictNext(di)) != NULL) {
robj *field = dictGetEntryKey(de);
robj *val = dictGetEntryVal(de);
if (fwrite(cmd,sizeof(cmd)-1,1,fp) == 0) goto werr;
if (fwriteBulkObject(fp,&key) == 0) goto werr;
if (fwriteBulkObject(fp,field) == 0) goto werr;
if (fwriteBulkObject(fp,val) == 0) goto werr;
}
dictReleaseIterator(di);
}
} else {
redisPanic("Unknown object type");
}
/* Save the expire time */
if (expiretime != -1) {
char cmd[]="*3\r\n$8\r\nEXPIREAT\r\n";
/* If this key is already expired skip it */
if (expiretime < now) continue;
if (fwrite(cmd,sizeof(cmd)-1,1,fp) == 0) goto werr;
if (fwriteBulkObject(fp,&key) == 0) goto werr;
if (fwriteBulkLongLong(fp,expiretime) == 0) goto werr;
}
if (swapped) decrRefCount(o);
}
dictReleaseIterator(di);
}
/* Make sure data will not remain on the OS's output buffers */
fflush(fp);
aof_fsync(fileno(fp));
fclose(fp);
/* Use RENAME to make sure the DB file is changed atomically only
* if the generate DB file is ok. */
if (rename(tmpfile,filename) == -1) {
redisLog(REDIS_WARNING,"Error moving temp append only file on the final destination: %s", strerror(errno));
unlink(tmpfile);
return REDIS_ERR;
}
redisLog(REDIS_NOTICE,"SYNC append only file rewrite performed");
return REDIS_OK;
werr:
fclose(fp);
unlink(tmpfile);
redisLog(REDIS_WARNING,"Write error writing append only file on disk: %s", strerror(errno));
if (di) dictReleaseIterator(di);
return REDIS_ERR;
}
static int
slotsmgrt(redisClient *c, sds host, sds port, int fd, int dbid, int timeout, robj *keys[], robj *vals[], int n) {
rio cmd;
rioInitWithBuffer(&cmd, sdsempty());
redisAssertWithInfo(c, NULL, rioWriteBulkCount(&cmd, '*', 2));
redisAssertWithInfo(c, NULL, rioWriteBulkString(&cmd, "SELECT", 6));
redisAssertWithInfo(c, NULL, rioWriteBulkLongLong(&cmd, dbid));
redisAssertWithInfo(c, NULL, rioWriteBulkCount(&cmd, '*', 1 + 3 * n));
redisAssertWithInfo(c, NULL, rioWriteBulkString(&cmd, "SLOTSRESTORE", 12));
sds onekey = NULL;
for (int i = 0; i < n; i ++) {
robj *key = keys[i], *val = vals[i];
long long ttl = 0, expireat = getExpire(c->db, key);
if (expireat != -1) {
ttl = expireat - mstime();
if (ttl < 1) {
ttl = 1;
}
}
sds skey = key->ptr;
redisAssertWithInfo(c, NULL, rioWriteBulkString(&cmd, skey, sdslen(skey)));
redisAssertWithInfo(c, NULL, rioWriteBulkLongLong(&cmd, ttl));
do {
rio pld;
createDumpPayload(&pld, val);
sds buf = pld.io.buffer.ptr;
redisAssertWithInfo(c, NULL, rioWriteBulkString(&cmd, buf, sdslen(buf)));
sdsfree(buf);
} while (0);
if (onekey == NULL) {
onekey = skey;
}
}
do {
sds buf = cmd.io.buffer.ptr;
size_t pos = 0, towrite;
int nwritten = 0;
while ((towrite = sdslen(buf) - pos) > 0) {
towrite = (towrite > (64 * 1024) ? (64 * 1024) : towrite);
nwritten = syncWrite(fd, buf + pos, towrite, timeout);
if (nwritten != (signed)towrite) {
redisLog(REDIS_WARNING, "slotsmgrt: writing to target %s:%s, error '%s', "
"nkeys = %d, onekey = '%s', cmd.len = %ld, pos = %ld, towrite = %ld",
host, port, server.neterr, n, onekey, sdslen(buf), pos, towrite);
addReplySds(c, sdsnew("-IOERR error or timeout writing to target\r\n"));
sdsfree(buf);
return -1;
}
pos += nwritten;
}
sdsfree(buf);
} while (0);
do {
char buf1[1024];
char buf2[1024];
if (syncReadLine(fd, buf1, sizeof(buf1), timeout) <= 0 ||
syncReadLine(fd, buf2, sizeof(buf2), timeout) <= 0) {
redisLog(REDIS_WARNING, "slotsmgrt: reading from target %s:%s, error '%s', nkeys = %d, onekey = '%s'",
host, port, server.neterr, n, onekey);
addReplySds(c, sdsnew("-IOERR error or timeout reading from target\r\n"));
return -1;
}
if (buf1[0] == '-' || buf2[0] == '-') {
redisLog(REDIS_WARNING, "slotsmgrt: response from target %s:%s: rsp1 = '%s', rsp2 = '%s', nkeys = %d, onekey = '%s'",
host, port, buf1, buf2, n, onekey);
addReplyError(c, "error on slotsrestore");
return -1;
}
} while (0);
redisLog(REDIS_VERBOSE, "slotsmgrt: migrate to %s:%s, nkeys = %d, onekey = '%s'", host, port, n, onekey);
return 0;
}
/* Write a sequence of commands able to fully rebuild the dataset into
* "filename". Used both by REWRITEAOF and BGREWRITEAOF. */
static int rewriteAppendOnlyFile(char *filename) {
dictIterator *di = NULL;
dictEntry *de;
FILE *fp;
char tmpfile[256];
int j;
time_t now = time(NULL);
/* Note that we have to use a different temp name here compared to the
* one used by rewriteAppendOnlyFileBackground() function. */
snprintf(tmpfile,256,"temp-rewriteaof-%d.aof", (int) getpid());
fp = fopen(tmpfile,"w");
for (j = 0; j < server.dbnum; j++) {
char selectcmd[] = "*2\r\n$6\r\nSELECT\r\n";
redisDb *db = server.db+j;
dict *d = db->dict;
if (dictSize(d) == 0) continue;
di = dictGetIterator(d);
/* SELECT the new DB */
fwrite(selectcmd,sizeof(selectcmd)-1,1,fp);
fwriteBulkLong(fp,j);
/* Iterate this DB writing every entry */
while((de = dictNext(di)) != NULL) {
robj *key, *o;
time_t expiretime;
int swapped;
key = dictGetEntryKey(de);
/* If the value for this key is swapped, load a preview in memory.
* We use a "swapped" flag to remember if we need to free the
* value object instead to just increment the ref count anyway
* in order to avoid copy-on-write of pages if we are forked() */
if (!server.vm_enabled || key->storage == REDIS_VM_MEMORY ||
key->storage == REDIS_VM_SWAPPING) {
o = dictGetEntryVal(de);
swapped = 0;
} else {
o = vmPreviewObject(key);
swapped = 1;
}
expiretime = getExpire(db,key);
/* Save the key and associated value */
if (o->type == REDIS_STRING) {
/* Emit a SET command */
char cmd[]="*3\r\n$3\r\nSET\r\n";
fwrite(cmd, sizeof(cmd)-1,1,fp);
/* Key and value */
fwriteBulkObject(fp,key);
fwriteBulkObject(fp,o);
}
else if (o->type == REDIS_LIST) {
/* Emit the RPUSHes needed to rebuild the list */
list *list = o->ptr;
listNode *ln;
listIter li;
listRewind(list,&li);
while((ln = listNext(&li))) {
char cmd[]="*3\r\n$5\r\nRPUSH\r\n";
robj *eleobj = listNodeValue(ln);
fwrite(cmd, sizeof(cmd)-1, 1, fp);
fwriteBulkObject(fp,key);
fwriteBulkObject(fp,eleobj);
}
}
else if (o->type == REDIS_SET) {
/* Emit the SADDs needed to rebuild the set */
dict *set = o->ptr;
dictIterator *di = dictGetIterator(set);
dictEntry *de;
while((de = dictNext(di)) != NULL) {
char cmd[]="*3\r\n$4\r\nSADD\r\n";
robj *eleobj = dictGetEntryKey(de);
fwrite(cmd,sizeof(cmd)-1,1,fp) ;
fwriteBulkObject(fp,key) ;
fwriteBulkObject(fp,eleobj);
}
dictReleaseIterator(di);
}
else if (o->type == REDIS_ZSET) {
/* Emit the ZADDs needed to rebuild the sorted set */
zset *zs = o->ptr;
dictIterator *di = dictGetIterator(zs->dict);
dictEntry *de;
while((de = dictNext(di)) != NULL) {
char cmd[]="*4\r\n$4\r\nZADD\r\n";
robj *eleobj = dictGetEntryKey(de);
double *score = dictGetEntryVal(de);
if (fwrite(cmd,sizeof(cmd)-1,1,fp) == 0) goto werr;
if (fwriteBulkObject(fp,key) == 0) goto werr;
if (fwriteBulkDouble(fp,*score) == 0) goto werr;
if (fwriteBulkObject(fp,eleobj) == 0) goto werr;
}
dictReleaseIterator(di);
} else if (o->type == REDIS_HASH) {
char cmd[]="*4\r\n$4\r\nHSET\r\n";
/* Emit the HSETs needed to rebuild the hash */
if (o->encoding == REDIS_ENCODING_ZIPMAP) {
unsigned char *p = zipmapRewind(o->ptr);
unsigned char *field, *val;
unsigned int flen, vlen;
while((p = zipmapNext(p,&field,&flen,&val,&vlen)) != NULL) {
if (fwrite(cmd,sizeof(cmd)-1,1,fp) == 0) goto werr;
if (fwriteBulkObject(fp,key) == 0) goto werr;
if (fwriteBulkString(fp,(char*)field,flen) == -1)
return -1;
if (fwriteBulkString(fp,(char*)val,vlen) == -1)
return -1;
}
} else {
dictIterator *di = dictGetIterator(o->ptr);
dictEntry *de;
while((de = dictNext(di)) != NULL) {
robj *field = dictGetEntryKey(de);
robj *val = dictGetEntryVal(de);
if (fwrite(cmd,sizeof(cmd)-1,1,fp) == 0) goto werr;
if (fwriteBulkObject(fp,key) == 0) goto werr;
if (fwriteBulkObject(fp,field) == -1) return -1;
if (fwriteBulkObject(fp,val) == -1) return -1;
}
dictReleaseIterator(di);
}
} else {
redisAssert(0);
}
/* Save the expire time */
if (expiretime != -1) {
char cmd[]="*3\r\n$8\r\nEXPIREAT\r\n";
/* If this key is already expired skip it */
if (expiretime < now) continue;
fwrite(cmd,sizeof(cmd)-1,1,fp) ;
fwriteBulkObject(fp,key) ;
fwriteBulkLong(fp,expiretime) ;
}
if (swapped) decrRefCount(o);
}
dictReleaseIterator(di);
}
/* Make sure data will not remain on the OS's output buffers */
fflush(fp);
fsync(fileno(fp));
fclose(fp);
/* Use RENAME to make sure the DB file is changed atomically only
* if the generate DB file is ok. */
rename(tmpfile,filename) ;
redisLog(REDIS_NOTICE,"SYNC append only file rewrite performed");
return REDIS_OK;
}
