Line data Source code
1 : /*
2 : * rmgr.c
3 : *
4 : * Resource managers definition
5 : *
6 : * src/backend/access/transam/rmgr.c
7 : */
8 : #include "postgres.h"
9 :
10 : #include "access/rmgr.h"
11 : #include "access/xlog_internal.h"
12 : #include "fmgr.h"
13 : #include "funcapi.h"
14 : #include "miscadmin.h"
15 : #include "nodes/execnodes.h"
16 : #include "utils/builtins.h"
17 : #include "utils/fmgrprotos.h"
18 : #include "utils/tuplestore.h"
19 :
20 : /* includes needed for "access/rmgrlist.h" */
21 : /* IWYU pragma: begin_keep */
22 : #include "access/brin_xlog.h"
23 : #include "access/clog.h"
24 : #include "access/commit_ts.h"
25 : #include "access/generic_xlog.h"
26 : #include "access/ginxlog.h"
27 : #include "access/gistxlog.h"
28 : #include "access/hash_xlog.h"
29 : #include "access/heapam_xlog.h"
30 : #include "access/multixact.h"
31 : #include "access/nbtxlog.h"
32 : #include "access/spgxlog.h"
33 : #include "access/xact.h"
34 : #include "catalog/storage_xlog.h"
35 : #include "commands/dbcommands_xlog.h"
36 : #include "commands/sequence.h"
37 : #include "commands/tablespace.h"
38 : #include "replication/decode.h"
39 : #include "replication/message.h"
40 : #include "replication/origin.h"
41 : #include "storage/standby.h"
42 : #include "utils/relmapper.h"
43 : /* IWYU pragma: end_keep */
44 :
45 :
46 : /* must be kept in sync with RmgrData definition in xlog_internal.h */
47 : #define PG_RMGR(symname,name,redo,desc,identify,startup,cleanup,mask,decode) \
48 : { name, redo, desc, identify, startup, cleanup, mask, decode },
49 :
50 : RmgrData RmgrTable[RM_MAX_ID + 1] = {
51 : #include "access/rmgrlist.h"
52 : };
53 :
54 : /*
55 : * Start up all resource managers.
56 : */
57 : void
58 392 : RmgrStartup(void)
59 : {
60 100744 : for (int rmid = 0; rmid <= RM_MAX_ID; rmid++)
61 : {
62 100352 : if (!RmgrIdExists(rmid))
63 91728 : continue;
64 :
65 8624 : if (RmgrTable[rmid].rm_startup != NULL)
66 1568 : RmgrTable[rmid].rm_startup();
67 : }
68 392 : }
69 :
70 : /*
71 : * Clean up all resource managers.
72 : */
73 : void
74 288 : RmgrCleanup(void)
75 : {
76 74016 : for (int rmid = 0; rmid <= RM_MAX_ID; rmid++)
77 : {
78 73728 : if (!RmgrIdExists(rmid))
79 67392 : continue;
80 :
81 6336 : if (RmgrTable[rmid].rm_cleanup != NULL)
82 1152 : RmgrTable[rmid].rm_cleanup();
83 : }
84 288 : }
85 :
86 : /*
87 : * Emit ERROR when we encounter a record with an RmgrId we don't
88 : * recognize.
89 : */
90 : void
91 0 : RmgrNotFound(RmgrId rmid)
92 : {
93 0 : ereport(ERROR, (errmsg("resource manager with ID %d not registered", rmid),
94 : errhint("Include the extension module that implements this resource manager in \"shared_preload_libraries\".")));
95 : }
96 :
97 : /*
98 : * Register a new custom WAL resource manager.
99 : *
100 : * Resource manager IDs must be globally unique across all extensions. Refer
101 : * to https://wiki.postgresql.org/wiki/CustomWALResourceManagers to reserve a
102 : * unique RmgrId for your extension, to avoid conflicts with other extension
103 : * developers. During development, use RM_EXPERIMENTAL_ID to avoid needlessly
104 : * reserving a new ID.
105 : */
106 : void
107 2 : RegisterCustomRmgr(RmgrId rmid, const RmgrData *rmgr)
108 : {
109 2 : if (rmgr->rm_name == NULL || strlen(rmgr->rm_name) == 0)
110 0 : ereport(ERROR, (errmsg("custom resource manager name is invalid"),
111 : errhint("Provide a non-empty name for the custom resource manager.")));
112 :
113 2 : if (!RmgrIdIsCustom(rmid))
114 0 : ereport(ERROR, (errmsg("custom resource manager ID %d is out of range", rmid),
115 : errhint("Provide a custom resource manager ID between %d and %d.",
116 : RM_MIN_CUSTOM_ID, RM_MAX_CUSTOM_ID)));
117 :
118 2 : if (!process_shared_preload_libraries_in_progress)
119 0 : ereport(ERROR,
120 : (errmsg("failed to register custom resource manager \"%s\" with ID %d", rmgr->rm_name, rmid),
121 : errdetail("Custom resource manager must be registered while initializing modules in \"shared_preload_libraries\".")));
122 :
123 2 : if (RmgrTable[rmid].rm_name != NULL)
124 0 : ereport(ERROR,
125 : (errmsg("failed to register custom resource manager \"%s\" with ID %d", rmgr->rm_name, rmid),
126 : errdetail("Custom resource manager \"%s\" already registered with the same ID.",
127 : RmgrTable[rmid].rm_name)));
128 :
129 : /* check for existing rmgr with the same name */
130 514 : for (int existing_rmid = 0; existing_rmid <= RM_MAX_ID; existing_rmid++)
131 : {
132 512 : if (!RmgrIdExists(existing_rmid))
133 468 : continue;
134 :
135 44 : if (!pg_strcasecmp(RmgrTable[existing_rmid].rm_name, rmgr->rm_name))
136 0 : ereport(ERROR,
137 : (errmsg("failed to register custom resource manager \"%s\" with ID %d", rmgr->rm_name, rmid),
138 : errdetail("Existing resource manager with ID %d has the same name.", existing_rmid)));
139 : }
140 :
141 : /* register it */
142 2 : RmgrTable[rmid] = *rmgr;
143 2 : ereport(LOG,
144 : (errmsg("registered custom resource manager \"%s\" with ID %d",
145 : rmgr->rm_name, rmid)));
146 2 : }
147 :
148 : /* SQL SRF showing loaded resource managers */
149 : Datum
150 2 : pg_get_wal_resource_managers(PG_FUNCTION_ARGS)
151 : {
152 : #define PG_GET_RESOURCE_MANAGERS_COLS 3
153 2 : ReturnSetInfo *rsinfo = (ReturnSetInfo *) fcinfo->resultinfo;
154 : Datum values[PG_GET_RESOURCE_MANAGERS_COLS];
155 2 : bool nulls[PG_GET_RESOURCE_MANAGERS_COLS] = {0};
156 :
157 2 : InitMaterializedSRF(fcinfo, 0);
158 :
159 514 : for (int rmid = 0; rmid <= RM_MAX_ID; rmid++)
160 : {
161 512 : if (!RmgrIdExists(rmid))
162 466 : continue;
163 46 : values[0] = Int32GetDatum(rmid);
164 46 : values[1] = CStringGetTextDatum(GetRmgr(rmid).rm_name);
165 46 : values[2] = BoolGetDatum(RmgrIdIsBuiltin(rmid));
166 46 : tuplestore_putvalues(rsinfo->setResult, rsinfo->setDesc, values, nulls);
167 : }
168 :
169 2 : return (Datum) 0;
170 : }
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