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sinval.h File Reference
#include <signal.h>
#include "storage/relfilenode.h"
Include dependency graph for sinval.h:
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Data Structures

struct  SharedInvalCatcacheMsg
 
struct  SharedInvalCatalogMsg
 
struct  SharedInvalRelcacheMsg
 
struct  SharedInvalSmgrMsg
 
struct  SharedInvalRelmapMsg
 
struct  SharedInvalSnapshotMsg
 
union  SharedInvalidationMessage
 

Macros

#define SHAREDINVALCATALOG_ID   (-1)
 
#define SHAREDINVALRELCACHE_ID   (-2)
 
#define SHAREDINVALSMGR_ID   (-3)
 
#define SHAREDINVALRELMAP_ID   (-4)
 
#define SHAREDINVALSNAPSHOT_ID   (-5)
 

Functions

void SendSharedInvalidMessages (const SharedInvalidationMessage *msgs, int n)
 
void ReceiveSharedInvalidMessages (void(*invalFunction)(SharedInvalidationMessage *msg), void(*resetFunction)(void))
 
void HandleCatchupInterrupt (void)
 
void ProcessCatchupInterrupt (void)
 
int xactGetCommittedInvalidationMessages (SharedInvalidationMessage **msgs, bool *RelcacheInitFileInval)
 
void ProcessCommittedInvalidationMessages (SharedInvalidationMessage *msgs, int nmsgs, bool RelcacheInitFileInval, Oid dbid, Oid tsid)
 
void LocalExecuteInvalidationMessage (SharedInvalidationMessage *msg)
 

Variables

uint64 SharedInvalidMessageCounter
 
volatile sig_atomic_t catchupInterruptPending
 

Macro Definition Documentation

◆ SHAREDINVALCATALOG_ID

#define SHAREDINVALCATALOG_ID   (-1)

◆ SHAREDINVALRELCACHE_ID

#define SHAREDINVALRELCACHE_ID   (-2)

◆ SHAREDINVALRELMAP_ID

#define SHAREDINVALRELMAP_ID   (-4)

◆ SHAREDINVALSMGR_ID

#define SHAREDINVALSMGR_ID   (-3)

◆ SHAREDINVALSNAPSHOT_ID

#define SHAREDINVALSNAPSHOT_ID   (-5)

Function Documentation

◆ HandleCatchupInterrupt()

void HandleCatchupInterrupt ( void  )

Definition at line 156 of file sinval.c.

References catchupInterruptPending, MyLatch, and SetLatch().

Referenced by procsignal_sigusr1_handler().

157 {
158  /*
159  * Note: this is called by a SIGNAL HANDLER. You must be very wary what
160  * you do here.
161  */
162 
164 
165  /* make sure the event is processed in due course */
166  SetLatch(MyLatch);
167 }
void SetLatch(Latch *latch)
Definition: latch.c:436
struct Latch * MyLatch
Definition: globals.c:54
volatile sig_atomic_t catchupInterruptPending
Definition: sinval.c:41

◆ LocalExecuteInvalidationMessage()

void LocalExecuteInvalidationMessage ( SharedInvalidationMessage msg)

Definition at line 556 of file inval.c.

References RELCACHECALLBACK::arg, RelFileNodeBackend::backend, SharedInvalSmgrMsg::backend_hi, SharedInvalSmgrMsg::backend_lo, CallSyscacheCallbacks(), SharedInvalidationMessage::cat, CatalogCacheFlushCatalog(), SharedInvalCatalogMsg::catId, SharedInvalidationMessage::cc, SharedInvalCatcacheMsg::dbId, SharedInvalCatalogMsg::dbId, SharedInvalRelcacheMsg::dbId, SharedInvalRelmapMsg::dbId, elog, FATAL, RELCACHECALLBACK::function, SharedInvalCatcacheMsg::hashValue, i, SharedInvalCatcacheMsg::id, SharedInvalidationMessage::id, InvalidateCatalogSnapshot(), InvalidOid, MyDatabaseId, RelFileNodeBackend::node, SharedInvalidationMessage::rc, RelationCacheInvalidate(), RelationCacheInvalidateEntry(), RelationMapInvalidate(), relcache_callback_count, relcache_callback_list, SharedInvalRelcacheMsg::relId, SharedInvalidationMessage::rm, SharedInvalSmgrMsg::rnode, SHAREDINVALCATALOG_ID, SHAREDINVALRELCACHE_ID, SHAREDINVALRELMAP_ID, SHAREDINVALSMGR_ID, SHAREDINVALSNAPSHOT_ID, SharedInvalidationMessage::sm, smgrclosenode(), and SysCacheInvalidate().

Referenced by AcceptInvalidationMessages(), AtEOSubXact_Inval(), AtEOXact_Inval(), CommandEndInvalidationMessages(), ReorderBufferExecuteInvalidations(), and ReorderBufferImmediateInvalidation().

557 {
558  if (msg->id >= 0)
559  {
560  if (msg->cc.dbId == MyDatabaseId || msg->cc.dbId == InvalidOid)
561  {
563 
564  SysCacheInvalidate(msg->cc.id, msg->cc.hashValue);
565 
566  CallSyscacheCallbacks(msg->cc.id, msg->cc.hashValue);
567  }
568  }
569  else if (msg->id == SHAREDINVALCATALOG_ID)
570  {
571  if (msg->cat.dbId == MyDatabaseId || msg->cat.dbId == InvalidOid)
572  {
574 
576 
577  /* CatalogCacheFlushCatalog calls CallSyscacheCallbacks as needed */
578  }
579  }
580  else if (msg->id == SHAREDINVALRELCACHE_ID)
581  {
582  if (msg->rc.dbId == MyDatabaseId || msg->rc.dbId == InvalidOid)
583  {
584  int i;
585 
586  if (msg->rc.relId == InvalidOid)
588  else
590 
591  for (i = 0; i < relcache_callback_count; i++)
592  {
593  struct RELCACHECALLBACK *ccitem = relcache_callback_list + i;
594 
595  ccitem->function(ccitem->arg, msg->rc.relId);
596  }
597  }
598  }
599  else if (msg->id == SHAREDINVALSMGR_ID)
600  {
601  /*
602  * We could have smgr entries for relations of other databases, so no
603  * short-circuit test is possible here.
604  */
605  RelFileNodeBackend rnode;
606 
607  rnode.node = msg->sm.rnode;
608  rnode.backend = (msg->sm.backend_hi << 16) | (int) msg->sm.backend_lo;
609  smgrclosenode(rnode);
610  }
611  else if (msg->id == SHAREDINVALRELMAP_ID)
612  {
613  /* We only care about our own database and shared catalogs */
614  if (msg->rm.dbId == InvalidOid)
615  RelationMapInvalidate(true);
616  else if (msg->rm.dbId == MyDatabaseId)
617  RelationMapInvalidate(false);
618  }
619  else if (msg->id == SHAREDINVALSNAPSHOT_ID)
620  {
621  /* We only care about our own database and shared catalogs */
622  if (msg->rm.dbId == InvalidOid)
624  else if (msg->rm.dbId == MyDatabaseId)
626  }
627  else
628  elog(FATAL, "unrecognized SI message ID: %d", msg->id);
629 }
SharedInvalRelcacheMsg rc
Definition: sinval.h:118
static struct RELCACHECALLBACK relcache_callback_list[MAX_RELCACHE_CALLBACKS]
static int relcache_callback_count
Definition: inval.c:211
RelcacheCallbackFunction function
Definition: inval.c:207
void RelationMapInvalidate(bool shared)
Definition: relmapper.c:403
#define FATAL
Definition: elog.h:52
#define SHAREDINVALRELCACHE_ID
Definition: sinval.h:76
SharedInvalRelmapMsg rm
Definition: sinval.h:120
#define SHAREDINVALRELMAP_ID
Definition: sinval.h:96
SharedInvalCatcacheMsg cc
Definition: sinval.h:116
void smgrclosenode(RelFileNodeBackend rnode)
Definition: smgr.c:310
SharedInvalCatalogMsg cat
Definition: sinval.h:117
void InvalidateCatalogSnapshot(void)
Definition: snapmgr.c:512
void CallSyscacheCallbacks(int cacheid, uint32 hashvalue)
Definition: inval.c:1487
Oid MyDatabaseId
Definition: globals.c:85
#define InvalidOid
Definition: postgres_ext.h:36
#define SHAREDINVALSNAPSHOT_ID
Definition: sinval.h:104
RelFileNode node
Definition: relfilenode.h:74
SharedInvalSmgrMsg sm
Definition: sinval.h:119
void SysCacheInvalidate(int cacheId, uint32 hashValue)
Definition: syscache.c:1449
void CatalogCacheFlushCatalog(Oid catId)
Definition: catcache.c:719
BackendId backend
Definition: relfilenode.h:75
void RelationCacheInvalidateEntry(Oid relationId)
Definition: relcache.c:2734
uint16 backend_lo
Definition: sinval.h:92
#define SHAREDINVALCATALOG_ID
Definition: sinval.h:67
#define elog(elevel,...)
Definition: elog.h:228
void RelationCacheInvalidate(void)
Definition: relcache.c:2778
int i
RelFileNode rnode
Definition: sinval.h:93
#define SHAREDINVALSMGR_ID
Definition: sinval.h:85

◆ ProcessCatchupInterrupt()

void ProcessCatchupInterrupt ( void  )

Definition at line 176 of file sinval.c.

References AcceptInvalidationMessages(), catchupInterruptPending, CommitTransactionCommand(), DEBUG4, elog, IsTransactionOrTransactionBlock(), and StartTransactionCommand().

Referenced by AutoVacLauncherMain(), and ProcessClientReadInterrupt().

177 {
179  {
180  /*
181  * What we need to do here is cause ReceiveSharedInvalidMessages() to
182  * run, which will do the necessary work and also reset the
183  * catchupInterruptPending flag. If we are inside a transaction we
184  * can just call AcceptInvalidationMessages() to do this. If we
185  * aren't, we start and immediately end a transaction; the call to
186  * AcceptInvalidationMessages() happens down inside transaction start.
187  *
188  * It is awfully tempting to just call AcceptInvalidationMessages()
189  * without the rest of the xact start/stop overhead, and I think that
190  * would actually work in the normal case; but I am not sure that
191  * things would clean up nicely if we got an error partway through.
192  */
194  {
195  elog(DEBUG4, "ProcessCatchupEvent inside transaction");
197  }
198  else
199  {
200  elog(DEBUG4, "ProcessCatchupEvent outside transaction");
203  }
204  }
205 }
void AcceptInvalidationMessages(void)
Definition: inval.c:681
void CommitTransactionCommand(void)
Definition: xact.c:2897
bool IsTransactionOrTransactionBlock(void)
Definition: xact.c:4653
#define DEBUG4
Definition: elog.h:22
void StartTransactionCommand(void)
Definition: xact.c:2796
#define elog(elevel,...)
Definition: elog.h:228
volatile sig_atomic_t catchupInterruptPending
Definition: sinval.c:41

◆ ProcessCommittedInvalidationMessages()

void ProcessCommittedInvalidationMessages ( SharedInvalidationMessage msgs,
int  nmsgs,
bool  RelcacheInitFileInval,
Oid  dbid,
Oid  tsid 
)

Definition at line 884 of file inval.c.

References DatabasePath, DEBUG4, elog, GetDatabasePath(), OidIsValid, pfree(), RelationCacheInitFilePostInvalidate(), RelationCacheInitFilePreInvalidate(), SendSharedInvalidMessages(), and trace_recovery().

Referenced by standby_redo(), and xact_redo_commit().

887 {
888  if (nmsgs <= 0)
889  return;
890 
891  elog(trace_recovery(DEBUG4), "replaying commit with %d messages%s", nmsgs,
892  (RelcacheInitFileInval ? " and relcache file invalidation" : ""));
893 
894  if (RelcacheInitFileInval)
895  {
896  elog(trace_recovery(DEBUG4), "removing relcache init files for database %u",
897  dbid);
898 
899  /*
900  * RelationCacheInitFilePreInvalidate, when the invalidation message
901  * is for a specific database, requires DatabasePath to be set, but we
902  * should not use SetDatabasePath during recovery, since it is
903  * intended to be used only once by normal backends. Hence, a quick
904  * hack: set DatabasePath directly then unset after use.
905  */
906  if (OidIsValid(dbid))
907  DatabasePath = GetDatabasePath(dbid, tsid);
908 
910 
911  if (OidIsValid(dbid))
912  {
914  DatabasePath = NULL;
915  }
916  }
917 
918  SendSharedInvalidMessages(msgs, nmsgs);
919 
920  if (RelcacheInitFileInval)
922 }
#define DEBUG4
Definition: elog.h:22
#define OidIsValid(objectId)
Definition: c.h:639
int trace_recovery(int trace_level)
Definition: elog.c:3591
void pfree(void *pointer)
Definition: mcxt.c:1056
char * GetDatabasePath(Oid dbNode, Oid spcNode)
Definition: relpath.c:107
void RelationCacheInitFilePostInvalidate(void)
Definition: relcache.c:5963
char * DatabasePath
Definition: globals.c:93
void RelationCacheInitFilePreInvalidate(void)
Definition: relcache.c:5938
void SendSharedInvalidMessages(const SharedInvalidationMessage *msgs, int n)
Definition: sinval.c:49
#define elog(elevel,...)
Definition: elog.h:228

◆ ReceiveSharedInvalidMessages()

void ReceiveSharedInvalidMessages ( void(*)(SharedInvalidationMessage *msg)  invalFunction,
void(*)(void)  resetFunction 
)

Definition at line 71 of file sinval.c.

References catchupInterruptPending, DEBUG4, elog, MAXINVALMSGS, SharedInvalidMessageCounter, SICleanupQueue(), and SIGetDataEntries().

Referenced by AcceptInvalidationMessages().

73 {
74 #define MAXINVALMSGS 32
75  static SharedInvalidationMessage messages[MAXINVALMSGS];
76 
77  /*
78  * We use volatile here to prevent bugs if a compiler doesn't realize that
79  * recursion is a possibility ...
80  */
81  static volatile int nextmsg = 0;
82  static volatile int nummsgs = 0;
83 
84  /* Deal with any messages still pending from an outer recursion */
85  while (nextmsg < nummsgs)
86  {
87  SharedInvalidationMessage msg = messages[nextmsg++];
88 
90  invalFunction(&msg);
91  }
92 
93  do
94  {
95  int getResult;
96 
97  nextmsg = nummsgs = 0;
98 
99  /* Try to get some more messages */
100  getResult = SIGetDataEntries(messages, MAXINVALMSGS);
101 
102  if (getResult < 0)
103  {
104  /* got a reset message */
105  elog(DEBUG4, "cache state reset");
107  resetFunction();
108  break; /* nothing more to do */
109  }
110 
111  /* Process them, being wary that a recursive call might eat some */
112  nextmsg = 0;
113  nummsgs = getResult;
114 
115  while (nextmsg < nummsgs)
116  {
117  SharedInvalidationMessage msg = messages[nextmsg++];
118 
120  invalFunction(&msg);
121  }
122 
123  /*
124  * We only need to loop if the last SIGetDataEntries call (which might
125  * have been within a recursive call) returned a full buffer.
126  */
127  } while (nummsgs == MAXINVALMSGS);
128 
129  /*
130  * We are now caught up. If we received a catchup signal, reset that
131  * flag, and call SICleanupQueue(). This is not so much because we need
132  * to flush dead messages right now, as that we want to pass on the
133  * catchup signal to the next slowest backend. "Daisy chaining" the
134  * catchup signal this way avoids creating spikes in system load for what
135  * should be just a background maintenance activity.
136  */
138  {
139  catchupInterruptPending = false;
140  elog(DEBUG4, "sinval catchup complete, cleaning queue");
141  SICleanupQueue(false, 0);
142  }
143 }
#define DEBUG4
Definition: elog.h:22
int SIGetDataEntries(SharedInvalidationMessage *data, int datasize)
Definition: sinvaladt.c:538
#define MAXINVALMSGS
void SICleanupQueue(bool callerHasWriteLock, int minFree)
Definition: sinvaladt.c:642
uint64 SharedInvalidMessageCounter
Definition: sinval.c:26
#define elog(elevel,...)
Definition: elog.h:228
volatile sig_atomic_t catchupInterruptPending
Definition: sinval.c:41

◆ SendSharedInvalidMessages()

void SendSharedInvalidMessages ( const SharedInvalidationMessage msgs,
int  n 
)

Definition at line 49 of file sinval.c.

References SIInsertDataEntries().

Referenced by AtEOXact_Inval(), CacheInvalidateRelmap(), CacheInvalidateSmgr(), FinishPreparedTransaction(), and ProcessCommittedInvalidationMessages().

50 {
51  SIInsertDataEntries(msgs, n);
52 }
void SIInsertDataEntries(const SharedInvalidationMessage *data, int n)
Definition: sinvaladt.c:435

◆ xactGetCommittedInvalidationMessages()

int xactGetCommittedInvalidationMessages ( SharedInvalidationMessage **  msgs,
bool RelcacheInitFileInval 
)

Definition at line 828 of file inval.c.

References Assert, TransInvalidationInfo::CurrentCmdInvalidMsgs, CurTransactionContext, MakeSharedInvalidMessagesArray(), MemoryContextSwitchTo(), TransInvalidationInfo::my_level, numSharedInvalidMessagesArray, TransInvalidationInfo::parent, TransInvalidationInfo::PriorCmdInvalidMsgs, ProcessInvalidationMessagesMulti(), TransInvalidationInfo::RelcacheInitFileInval, and SharedInvalidMessagesArray.

Referenced by RecordTransactionCommit(), and StartPrepare().

830 {
831  MemoryContext oldcontext;
832 
833  /* Quick exit if we haven't done anything with invalidation messages. */
834  if (transInvalInfo == NULL)
835  {
836  *RelcacheInitFileInval = false;
837  *msgs = NULL;
838  return 0;
839  }
840 
841  /* Must be at top of stack */
843 
844  /*
845  * Relcache init file invalidation requires processing both before and
846  * after we send the SI messages. However, we need not do anything unless
847  * we committed.
848  */
849  *RelcacheInitFileInval = transInvalInfo->RelcacheInitFileInval;
850 
851  /*
852  * Walk through TransInvalidationInfo to collect all the messages into a
853  * single contiguous array of invalidation messages. It must be contiguous
854  * so we can copy directly into WAL message. Maintain the order that they
855  * would be processed in by AtEOXact_Inval(), to ensure emulated behaviour
856  * in redo is as similar as possible to original. We want the same bugs,
857  * if any, not new ones.
858  */
860 
865  MemoryContextSwitchTo(oldcontext);
866 
868  SharedInvalidMessagesArray == NULL));
869 
871 
873 }
static SharedInvalidationMessage * SharedInvalidMessagesArray
Definition: inval.c:175
InvalidationListHeader PriorCmdInvalidMsgs
Definition: inval.c:167
static MemoryContext MemoryContextSwitchTo(MemoryContext context)
Definition: palloc.h:109
MemoryContext CurTransactionContext
Definition: mcxt.c:50
struct TransInvalidationInfo * parent
Definition: inval.c:158
static TransInvalidationInfo * transInvalInfo
Definition: inval.c:173
InvalidationListHeader CurrentCmdInvalidMsgs
Definition: inval.c:164
static void MakeSharedInvalidMessagesArray(const SharedInvalidationMessage *msgs, int n)
Definition: inval.c:778
static int numSharedInvalidMessagesArray
Definition: inval.c:176
static void ProcessInvalidationMessagesMulti(InvalidationListHeader *hdr, void(*func)(const SharedInvalidationMessage *msgs, int n))
Definition: inval.c:468
bool RelcacheInitFileInval
Definition: inval.c:170
#define Assert(condition)
Definition: c.h:733

Variable Documentation

◆ catchupInterruptPending

volatile sig_atomic_t catchupInterruptPending

◆ SharedInvalidMessageCounter

uint64 SharedInvalidMessageCounter