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Renumber MDB_NOSUBDIR. Check mdb_env_open() flags.

Browse source 
MDB_NOSUBDIR was == MDB_REVERSEKEY. That affected the freelist:
Env flags are stored in mm_flags alias mm_dbs[FREE_DBI].md_flags.

It stays a persistent flag, in case mdb_env_open someday wants
to pick/verify which lockfile to use with the datafile.

Catch bad flags so they will no longer make it into the data file.
This commit is contained in:
Hallvard Furuseth 2012-11-27 23:56:47 +01:00
parent bb36bdcd1c
commit 52e3adbdec
2 changed files with 12 additions and 7 deletions
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13
libraries/libmdb/mdb.c
View file

@ -3146,6 +3146,12 @@ fail:
#define DATANAME "/data.mdb"
/** The suffix of the lock file when no subdir is used */
#define LOCKSUFF "-lock"
/** Only a subset of the @ref mdb_env flags can be changed
* at runtime. Changing other flags requires closing the
* environment and re-opening it with the new flags.
*/
#define CHANGEABLE (MDB_NOSYNC|MDB_NOMETASYNC|MDB_MAPASYNC)
#define CHANGELESS (MDB_FIXEDMAP|MDB_NOSUBDIR|MDB_RDONLY|MDB_WRITEMAP)
int
mdb_env_open(MDB_env *env, const char *path, unsigned int flags, mode_t mode)
@ -3153,7 +3159,7 @@ mdb_env_open(MDB_env *env, const char *path, unsigned int flags, mode_t mode)
int oflags, rc, len, excl;
char *lpath, *dpath;
if (env->me_fd != INVALID_HANDLE_VALUE)
if (env->me_fd!=INVALID_HANDLE_VALUE || (flags & ~(CHANGEABLE|CHANGELESS)))
return EINVAL;
len = strlen(path);
@ -6599,11 +6605,6 @@ mdb_put(MDB_txn *txn, MDB_dbi dbi,
return mdb_cursor_put(&mc, key, data, flags);
}
/** Only a subset of the @ref mdb_env flags can be changed
* at runtime. Changing other flags requires closing the environment
* and re-opening it with the new flags.
*/
#define CHANGEABLE (MDB_NOSYNC|MDB_NOMETASYNC|MDB_MAPASYNC)
int
mdb_env_set_flags(MDB_env *env, unsigned int flag, int onoff)
{

6
libraries/libmdb/mdb.h
View file

@ -213,12 +213,14 @@ typedef int (MDB_cmp_func)(const MDB_val *a, const MDB_val *b);
typedef void (MDB_rel_func)(MDB_val *item, void *oldptr, void *newptr, void *relctx);
/** @defgroup mdb_env Environment Flags
*
* Values do not overlap Database Flags.
* @{
*/
/** mmap at a fixed address */
#define MDB_FIXEDMAP 0x01
/** no environment directory */
#define MDB_NOSUBDIR 0x02
#define MDB_NOSUBDIR 0x4000
/** don't fsync after commit */
#define MDB_NOSYNC 0x10000
/** read only */
@ -232,6 +234,8 @@ typedef void (MDB_rel_func)(MDB_val *item, void *oldptr, void *newptr, void *rel
/** @} */
/** @defgroup mdb_open Database Flags
*
* Values do not overlap Environment Flags.
* @{
*/
/** use reverse string keys */