X-Git-Url: http://git.ozlabs.org/?p=ccan;a=blobdiff_plain;f=ccan%2Ftdb2%2Fprivate.h;h=8d961e82c365c6b0f6956fbf1019451c285597f5;hp=1309ce16c0a14c79bc67ee2192696dc4033b0c80;hb=0fd5be2955f8e6487c0f4ab711e2a6958bb8f412;hpb=156e5eb92f1d986957cb081b58320579c6e366dd

diff --git a/ccan/tdb2/private.h b/ccan/tdb2/private.h
index 1309ce16..8d961e82 100644
--- a/ccan/tdb2/private.h
+++ b/ccan/tdb2/private.h
@@ -18,26 +18,19 @@
    License along with this library; if not, see <http://www.gnu.org/licenses/>.
 */
 
-#include "config.h"
-#include <stdint.h>
-#include <stdbool.h>
+#include <ccan/tdb2/tdb2.h>
 #include <stdlib.h>
 #include <stddef.h>
 #include <sys/time.h>
 #include <sys/mman.h>
 #include <unistd.h>
 #include <fcntl.h>
-#include <string.h>
 #include <errno.h>
 #include <stdio.h>
 #include <utime.h>
 #include <unistd.h>
-#include <ccan/tdb2/tdb2.h>
 #include <ccan/likely/likely.h>
-#include <ccan/compiler/compiler.h>
-#if HAVE_BYTESWAP_H
-#include <byteswap.h>
-#endif
+#include <ccan/endian/endian.h>
 
 #ifndef TEST_IT
 #define TEST_IT(cond)
@@ -84,10 +77,10 @@ typedef int tdb_bool_err;
 
 /* Prevent others from opening the file. */
 #define TDB_OPEN_LOCK 0
-/* Doing a transaction. */
-#define TDB_TRANSACTION_LOCK 1
 /* Expanding file. */
 #define TDB_EXPANSION_LOCK 2
+/* Doing a transaction. */
+#define TDB_TRANSACTION_LOCK 8
 /* Hash chain locks. */
 #define TDB_HASH_LOCK_START 64
 
@@ -134,20 +127,6 @@ typedef int tdb_bool_err;
 /* Indicates this entry is not on an flist (can happen during coalescing) */
 #define TDB_FTABLE_NONE ((1ULL << TDB_OFF_UPPER_STEAL) - 1)
 
-#if !HAVE_BSWAP_64
-static inline uint64_t bswap_64(uint64_t x)
-{
-	return (((x&0x000000FFULL)<<56)
-		| ((x&0x0000FF00ULL)<<48)
-		| ((x&0x00FF0000ULL)<<40)
-		| ((x&0xFF000000ULL)<<32)
-		| ((x>>8)&0xFF000000ULL)
-		| ((x>>16)&0x00FF0000ULL)
-		| ((x>>24)&0x0000FF00ULL)
-		| ((x>>32)&0x000000FFULL));
-}
-#endif
-
 struct tdb_used_record {
 	/* For on-disk compatibility, we avoid bitfields:
 	   magic: 16,        (highest)
@@ -219,7 +198,7 @@ static inline unsigned frec_ftable(const struct tdb_free_record *f)
 
 struct tdb_recovery_record {
 	uint64_t magic;
-	/* Length of record. */
+	/* Length of record (add this header to get total length). */
 	uint64_t max_len;
 	/* Length used. */
 	uint64_t len;
@@ -304,7 +283,7 @@ enum tdb_lock_flags {
 
 struct tdb_lock {
 	struct tdb_context *owner;
-	uint32_t off;
+	off_t off;
 	uint32_t count;
 	uint32_t ltype;
 };
@@ -319,9 +298,6 @@ struct tdb_access_hdr {
 };
 
 struct tdb_file {
-	/* Single list of all TDBs, to detect multiple opens. */
-	struct tdb_file *next;
-
 	/* How many are sharing us? */
 	unsigned int refcnt;
 
@@ -346,30 +322,36 @@ struct tdb_file {
 };
 
 struct tdb_context {
+	/* Single list of all TDBs, to detect multiple opens. */
+	struct tdb_context *next;
+
 	/* Filename of the database. */
 	const char *name;
 
-	/* Are we accessing directly? (debugging check). */
-	int direct_access;
-
-	/* Operating read-only? (Opened O_RDONLY, or in traverse_read) */
-	bool read_only;
+	/* Logging function */
+	void (*log_fn)(struct tdb_context *tdb,
+		       enum tdb_log_level level,
+		       enum TDB_ERROR ecode,
+		       const char *message,
+		       void *data);
+	void *log_data;
 
-	/* mmap read only? */
-	int mmap_flags;
+	/* Open flags passed to tdb_open. */
+	int open_flags;
 
-	/* Error code for last tdb error. */
-	enum TDB_ERROR ecode;
+	/* low level (fnctl) lock functions. */
+	int (*lock_fn)(int fd, int rw, off_t off, off_t len, bool w, void *);
+	int (*unlock_fn)(int fd, int rw, off_t off, off_t len, void *);
+	void *lock_data;
 
-	/* the flags passed to tdb_open, for tdb_reopen. */
+	/* the flags passed to tdb_open. */
 	uint32_t flags;
 
-	/* Logging function */
-	void (*log_fn)(struct tdb_context *tdb,
-		       enum tdb_log_level level,
-		       void *data,
-		       const char *message);
-	void *log_data;
+	/* Our statistics. */
+	struct tdb_attribute_stats stats;
+
+	/* Are we accessing directly? (debugging check). */
+	int direct_access;
 
 	/* Hash function. */
 	uint64_t (*hash_fn)(const void *key, size_t len, uint64_t seed, void *);
@@ -383,11 +365,13 @@ struct tdb_context {
 	tdb_off_t ftable_off;
 	unsigned int ftable;
 
+	/* Our open hook, if any. */
+	enum TDB_ERROR (*openhook)(int fd, void *data);
+	void *openhook_data;
+
 	/* IO methods: changes for transactions. */
 	const struct tdb_methods *methods;
 
-	struct tdb_attribute_stats *stats;
-
 	/* Direct access information */
 	struct tdb_access_hdr *access;
 
@@ -412,8 +396,6 @@ struct tdb_methods {
   internal prototypes
 */
 /* hash.c: */
-void tdb_hash_init(struct tdb_context *tdb);
-
 tdb_bool_err first_in_hash(struct tdb_context *tdb,
 			   struct traverse_info *tinfo,
 			   TDB_DATA *kbuf, size_t *dlen);
@@ -461,7 +443,9 @@ tdb_off_t alloc(struct tdb_context *tdb, size_t keylen, size_t datalen,
 
 /* Put this record in a free list. */
 enum TDB_ERROR add_free_record(struct tdb_context *tdb,
-			       tdb_off_t off, tdb_len_t len_with_header);
+			       tdb_off_t off, tdb_len_t len_with_header,
+			       enum tdb_lock_flags waitflag,
+			       bool coalesce_ok);
 
 /* Set up header for a used/ftable/htable/chain record. */
 enum TDB_ERROR set_header(struct tdb_context *tdb,
@@ -532,14 +516,6 @@ enum TDB_ERROR tdb_read_convert(struct tdb_context *tdb, tdb_off_t off,
 /* Bump the seqnum (caller checks for tdb->flags & TDB_SEQNUM) */
 void tdb_inc_seqnum(struct tdb_context *tdb);
 
-/* Adds a stat, if it's in range. */
-void add_stat_(struct tdb_context *tdb, uint64_t *stat, size_t val);
-#define add_stat(tdb, statname, val)					\
-	do {								\
-		if (unlikely((tdb)->stats))				\
-			add_stat_((tdb), &(tdb)->stats->statname, (val)); \
-	} while (0)
-
 /* lock.c: */
 /* Lock/unlock a range of hashes. */
 enum TDB_ERROR tdb_lock_hashes(struct tdb_context *tdb,
@@ -572,8 +548,8 @@ enum TDB_ERROR tdb_allrecord_upgrade(struct tdb_context *tdb);
 
 /* Serialize db open. */
 enum TDB_ERROR tdb_lock_open(struct tdb_context *tdb,
-			     enum tdb_lock_flags flags);
-void tdb_unlock_open(struct tdb_context *tdb);
+			     int ltype, enum tdb_lock_flags flags);
+void tdb_unlock_open(struct tdb_context *tdb, int ltype);
 bool tdb_has_open_lock(struct tdb_context *tdb);
 
 /* Serialize db expand. */
@@ -584,6 +560,10 @@ bool tdb_has_expansion_lock(struct tdb_context *tdb);
 /* If it needs recovery, grab all the locks and do it. */
 enum TDB_ERROR tdb_lock_and_recover(struct tdb_context *tdb);
 
+/* Default lock and unlock functions. */
+int tdb_fcntl_lock(int fd, int rw, off_t off, off_t len, bool waitflag, void *);
+int tdb_fcntl_unlock(int fd, int rw, off_t off, off_t len, void *);
+
 /* transaction.c: */
 enum TDB_ERROR tdb_transaction_recover(struct tdb_context *tdb);
 tdb_bool_err tdb_needs_recovery(struct tdb_context *tdb);