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-rw-r--r--source4/lib/tdb/common/tdb.c32
-rw-r--r--source4/lib/tdb/include/tdb.h5
-rw-r--r--source4/lib/tdb_helper.c2
3 files changed, 22 insertions, 17 deletions
diff --git a/source4/lib/tdb/common/tdb.c b/source4/lib/tdb/common/tdb.c
index ef13955fab..b9ca46c322 100644
--- a/source4/lib/tdb/common/tdb.c
+++ b/source4/lib/tdb/common/tdb.c
@@ -331,7 +331,7 @@ static int tdb_unlock(TDB_CONTEXT *tdb, int list, int ltype)
}
/* This is based on the hash algorithm from gdbm */
-static u32 tdb_hash(TDB_DATA *key)
+static u32 default_tdb_hash(TDB_DATA *key)
{
u32 value; /* Used to compute the hash value. */
u32 i; /* Used to cycle through random values. */
@@ -1171,7 +1171,7 @@ TDB_DATA tdb_fetch(TDB_CONTEXT *tdb, TDB_DATA key)
u32 hash;
/* find which hash bucket it is in */
- hash = tdb_hash(&key);
+ hash = tdb->hash_fn(&key);
if (!(rec_ptr = tdb_find_lock_hash(tdb,key,hash,F_RDLCK,&rec)))
return tdb_null;
@@ -1203,7 +1203,7 @@ static int tdb_exists_hash(TDB_CONTEXT *tdb, TDB_DATA key, u32 hash)
int tdb_exists(TDB_CONTEXT *tdb, TDB_DATA key)
{
- u32 hash = tdb_hash(&key);
+ u32 hash = tdb->hash_fn(&key);
return tdb_exists_hash(tdb, key, hash);
}
@@ -1463,7 +1463,7 @@ TDB_DATA tdb_nextkey(TDB_CONTEXT *tdb, TDB_DATA oldkey)
if (!tdb->travlocks.off) {
/* No previous element: do normal find, and lock record */
- tdb->travlocks.off = tdb_find_lock_hash(tdb, oldkey, tdb_hash(&oldkey), F_WRLCK, &rec);
+ tdb->travlocks.off = tdb_find_lock_hash(tdb, oldkey, tdb->hash_fn(&oldkey), F_WRLCK, &rec);
if (!tdb->travlocks.off)
return tdb_null;
tdb->travlocks.hash = BUCKET(rec.full_hash);
@@ -1507,7 +1507,7 @@ static int tdb_delete_hash(TDB_CONTEXT *tdb, TDB_DATA key, u32 hash)
int tdb_delete(TDB_CONTEXT *tdb, TDB_DATA key)
{
- u32 hash = tdb_hash(&key);
+ u32 hash = tdb->hash_fn(&key);
return tdb_delete_hash(tdb, key, hash);
}
@@ -1525,7 +1525,7 @@ int tdb_store(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA dbuf, int flag)
int ret = 0;
/* find which hash bucket it is in */
- hash = tdb_hash(&key);
+ hash = tdb->hash_fn(&key);
if (!tdb_keylocked(tdb, hash))
return -1;
if (tdb_lock(tdb, BUCKET(hash), F_WRLCK) == -1)
@@ -1643,7 +1643,7 @@ int tdb_append(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA new_dbuf)
size_t new_data_size = 0;
/* find which hash bucket it is in */
- hash = tdb_hash(&key);
+ hash = tdb->hash_fn(&key);
if (!tdb_keylocked(tdb, hash))
return -1;
if (tdb_lock(tdb, BUCKET(hash), F_WRLCK) == -1)
@@ -1752,13 +1752,14 @@ static int tdb_already_open(dev_t device,
TDB_CONTEXT *tdb_open(const char *name, int hash_size, int tdb_flags,
int open_flags, mode_t mode)
{
- return tdb_open_ex(name, hash_size, tdb_flags, open_flags, mode, NULL);
+ return tdb_open_ex(name, hash_size, tdb_flags, open_flags, mode, NULL, NULL);
}
TDB_CONTEXT *tdb_open_ex(const char *name, int hash_size, int tdb_flags,
int open_flags, mode_t mode,
- tdb_log_func log_fn)
+ tdb_log_func log_fn,
+ tdb_hash_func hash_fn)
{
TDB_CONTEXT *tdb;
struct stat st;
@@ -1778,7 +1779,8 @@ TDB_CONTEXT *tdb_open_ex(const char *name, int hash_size, int tdb_flags,
tdb->flags = tdb_flags;
tdb->open_flags = open_flags;
tdb->log_fn = log_fn;
-
+ tdb->hash_fn = hash_fn ? hash_fn : default_tdb_hash;
+
if ((open_flags & O_ACCMODE) == O_WRONLY) {
TDB_LOG((tdb, 0, "tdb_open_ex: can't open tdb %s write-only\n",
name));
@@ -2023,7 +2025,7 @@ int tdb_lockkeys(TDB_CONTEXT *tdb, u32 number, TDB_DATA keys[])
/* Insertion sort by bucket */
for (i = 0; i < number; i++) {
- hash = tdb_hash(&keys[i]);
+ hash = tdb->hash_fn(&keys[i]);
for (j = 0; j < i && BUCKET(tdb->lockedkeys[j+1]) < BUCKET(hash); j++);
memmove(&tdb->lockedkeys[j+2], &tdb->lockedkeys[j+1], sizeof(u32) * (i-j));
tdb->lockedkeys[j+1] = hash;
@@ -2058,22 +2060,22 @@ void tdb_unlockkeys(TDB_CONTEXT *tdb)
contention - it cannot guarantee how many records will be locked */
int tdb_chainlock(TDB_CONTEXT *tdb, TDB_DATA key)
{
- return tdb_lock(tdb, BUCKET(tdb_hash(&key)), F_WRLCK);
+ return tdb_lock(tdb, BUCKET(tdb->hash_fn(&key)), F_WRLCK);
}
int tdb_chainunlock(TDB_CONTEXT *tdb, TDB_DATA key)
{
- return tdb_unlock(tdb, BUCKET(tdb_hash(&key)), F_WRLCK);
+ return tdb_unlock(tdb, BUCKET(tdb->hash_fn(&key)), F_WRLCK);
}
int tdb_chainlock_read(TDB_CONTEXT *tdb, TDB_DATA key)
{
- return tdb_lock(tdb, BUCKET(tdb_hash(&key)), F_RDLCK);
+ return tdb_lock(tdb, BUCKET(tdb->hash_fn(&key)), F_RDLCK);
}
int tdb_chainunlock_read(TDB_CONTEXT *tdb, TDB_DATA key)
{
- return tdb_unlock(tdb, BUCKET(tdb_hash(&key)), F_RDLCK);
+ return tdb_unlock(tdb, BUCKET(tdb->hash_fn(&key)), F_RDLCK);
}
diff --git a/source4/lib/tdb/include/tdb.h b/source4/lib/tdb/include/tdb.h
index 73a0ea8f83..02b89087a8 100644
--- a/source4/lib/tdb/include/tdb.h
+++ b/source4/lib/tdb/include/tdb.h
@@ -102,6 +102,7 @@ typedef struct tdb_context {
dev_t device; /* uniquely identifies this tdb */
ino_t inode; /* uniquely identifies this tdb */
void (*log_fn)(struct tdb_context *tdb, int level, const char *, ...); /* logging function */
+ u32 (*hash_fn)(TDB_DATA *key);
int open_flags; /* flags used in the open - needed by reopen */
} TDB_CONTEXT;
@@ -109,12 +110,14 @@ void tdb_debug(TDB_CONTEXT *, int , const char *, ...);
typedef int (*tdb_traverse_func)(TDB_CONTEXT *, TDB_DATA, TDB_DATA, void *);
typedef void (*tdb_log_func)(TDB_CONTEXT *, int , const char *, ...);
+typedef u32 (*tdb_hash_func)(TDB_DATA *key);
TDB_CONTEXT *tdb_open(const char *name, int hash_size, int tdb_flags,
int open_flags, mode_t mode);
TDB_CONTEXT *tdb_open_ex(const char *name, int hash_size, int tdb_flags,
int open_flags, mode_t mode,
- tdb_log_func log_fn);
+ tdb_log_func log_fn,
+ tdb_hash_func hash_fn);
int tdb_reopen(TDB_CONTEXT *tdb);
int tdb_reopen_all(void);
diff --git a/source4/lib/tdb_helper.c b/source4/lib/tdb_helper.c
index 121243bd0f..22c4d1bb45 100644
--- a/source4/lib/tdb_helper.c
+++ b/source4/lib/tdb_helper.c
@@ -59,7 +59,7 @@ TDB_CONTEXT *tdb_open_log(const char *name, int hash_size, int tdb_flags,
tdb_flags |= TDB_NOMMAP;
tdb = tdb_open_ex(name, hash_size, tdb_flags,
- open_flags, mode, tdb_log);
+ open_flags, mode, tdb_log, NULL);
if (!tdb)
return NULL;
generated by cgit (git 2.34.1) at 2024-11-10 10:51:04 +0000