diff options
Diffstat (limited to 'src/backend/access/transam/xlog.c')
| -rw-r--r-- | src/backend/access/transam/xlog.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/src/backend/access/transam/xlog.c b/src/backend/access/transam/xlog.c index b99ded5df67..58790e0e96e 100644 --- a/src/backend/access/transam/xlog.c +++ b/src/backend/access/transam/xlog.c @@ -504,6 +504,12 @@ typedef enum ExclusiveBackupState } ExclusiveBackupState; /* + * Session status of running backup, used for sanity checks in SQL-callable + * functions to start and stop backups. + */ +static SessionBackupState sessionBackupState = SESSION_BACKUP_NONE; + +/* * Shared state data for WAL insertion. */ typedef struct XLogCtlInsert @@ -10566,13 +10572,17 @@ do_pg_start_backup(const char *backupidstr, bool fast, TimeLineID *starttli_p, /* * Mark that start phase has correctly finished for an exclusive backup. + * Session-level locks are updated as well to reflect that state. */ if (exclusive) { WALInsertLockAcquireExclusive(); XLogCtl->Insert.exclusiveBackupState = EXCLUSIVE_BACKUP_IN_PROGRESS; WALInsertLockRelease(); + sessionBackupState = SESSION_BACKUP_EXCLUSIVE; } + else + sessionBackupState = SESSION_BACKUP_NON_EXCLUSIVE; /* * We're done. As a convenience, return the starting WAL location. @@ -10628,6 +10638,15 @@ pg_stop_backup_callback(int code, Datum arg) } /* + * Utility routine to fetch the session-level status of a backup running. + */ +SessionBackupState +get_backup_status(void) +{ + return sessionBackupState; +} + +/* * do_pg_stop_backup is the workhorse of the user-visible pg_stop_backup() * function. * @@ -10794,6 +10813,9 @@ do_pg_stop_backup(char *labelfile, bool waitforarchive, TimeLineID *stoptli_p) } WALInsertLockRelease(); + /* Clean up session-level lock */ + sessionBackupState = SESSION_BACKUP_NONE; + /* * Read and parse the START WAL LOCATION line (this code is pretty crude, * but we are not expecting any variability in the file format). |