mp_fset.c

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00001 /*-
00002  * See the file LICENSE for redistribution information.
00003  *
00004  * Copyright (c) 1996, 1997, 1998, 1999, 2000
00005  *      Sleepycat Software.  All rights reserved.
00006  */
00007 #include "config.h"
00008 
00009 #ifndef lint
00010 static const char revid[] = "$Id: mp__fset_8c-source.html,v 1.1 2008/06/08 10:20:47 sebdiaz Exp $";
00011 #endif /* not lint */
00012 
00013 #ifndef NO_SYSTEM_INCLUDES
00014 #include <sys/types.h>
00015 
00016 #include <errno.h>
00017 #endif
00018 
00019 #ifdef  HAVE_RPC
00020 #include "db_server.h"
00021 #endif
00022 
00023 #include "db_int.h"
00024 #include "db_shash.h"
00025 #include "mp.h"
00026 
00027 #ifdef HAVE_RPC
00028 #include "gen_client_ext.h"
00029 #include "rpc_client_ext.h"
00030 #endif
00031 
00032 /*
00033  * CDB_memp_fset --
00034  *      Mpool page set-flag routine.
00035  */
00036 int
00037 CDB_memp_fset(dbmfp, pgaddr, flags)
00038         DB_MPOOLFILE *dbmfp;
00039         void *pgaddr;
00040         u_int32_t flags;
00041 {
00042         BH *bhp;
00043         DB_ENV *dbenv;
00044         DB_MPOOL *dbmp;
00045         MPOOL *c_mp, *mp;
00046         int ret;
00047 
00048         dbmp = dbmfp->dbmp;
00049         dbenv = dbmp->dbenv;
00050         mp = dbmp->reginfo[0].primary;
00051 
00052 #ifdef HAVE_RPC
00053         if (F_ISSET(dbenv, DB_ENV_RPCCLIENT))
00054                 return (__dbcl_memp_fset(dbmfp, pgaddr, flags));
00055 #endif
00056 
00057         PANIC_CHECK(dbenv);
00058 
00059         /* Validate arguments. */
00060         if (flags == 0)
00061                 return (CDB___db_ferr(dbenv, "CDB_memp_fset", 1));
00062 
00063         if ((ret = CDB___db_fchk(dbenv, "CDB_memp_fset", flags,
00064             DB_MPOOL_DIRTY | DB_MPOOL_CLEAN | DB_MPOOL_DISCARD)) != 0)
00065                 return (ret);
00066         if ((ret = CDB___db_fcchk(dbenv, "CDB_memp_fset",
00067             flags, DB_MPOOL_CLEAN, DB_MPOOL_DIRTY)) != 0)
00068                 return (ret);
00069 
00070         if (LF_ISSET(DB_MPOOL_DIRTY) && F_ISSET(dbmfp, MP_READONLY)) {
00071                 CDB___db_err(dbenv, "%s: dirty flag set for readonly file page",
00072                     CDB___memp_fn(dbmfp));
00073                 return (EACCES);
00074         }
00075 
00076         /* Convert the page address to a buffer header. */
00077         bhp = (BH *)((u_int8_t *)pgaddr - SSZA(BH, buf));
00078 
00079         /* Convert the buffer header to a cache. */
00080         c_mp = BH_TO_CACHE(dbmp, bhp);
00081 
00082         R_LOCK(dbenv, dbmp->reginfo);
00083 
00084         if (LF_ISSET(DB_MPOOL_CLEAN) && F_ISSET(bhp, BH_DIRTY)) {
00085                 ++c_mp->stat.st_page_clean;
00086                 --c_mp->stat.st_page_dirty;
00087                 F_CLR(bhp, BH_DIRTY);
00088         }
00089         if (LF_ISSET(DB_MPOOL_DIRTY) && !F_ISSET(bhp, BH_DIRTY)) {
00090                 --c_mp->stat.st_page_clean;
00091                 ++c_mp->stat.st_page_dirty;
00092                 F_SET(bhp, BH_DIRTY);
00093         }
00094         if (LF_ISSET(DB_MPOOL_DISCARD))
00095                 F_SET(bhp, BH_DISCARD);
00096 
00097         R_UNLOCK(dbenv, dbmp->reginfo);
00098         return (0);
00099 }

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