tdb2: remove all the dead code

I left much tdb1 code in various files for inspiration, and in case I needed
it later.  Now we have all the major features implemented, remove it.

diff --git a/ccan/tdb2/io.c b/ccan/tdb2/io.c
index 676f4942bf604c879b767e8a296eca0f319d2dae..6c8f847b2b8bb19e29ce482d5a3a82c78779102c 100644 (file)
--- a/ccan/tdb2/io.c
+++ b/ccan/tdb2/io.c
@@ -536,114 +536,6 @@ int tdb_access_commit(struct tdb_context *tdb, void *p)
        return ret;
 }
 
        return ret;
 }
 

-#if 0
-/* write a lump of data at a specified offset */
-static int tdb_write(struct tdb_context *tdb, tdb_off_t off, 
-                    const void *buf, tdb_len_t len)
-{
-       if (len == 0) {
-               return 0;
-       }
-
-       if (tdb->read_only || tdb->traverse_read) {
-               tdb->ecode = TDB_ERR_RDONLY;
-               return -1;
-       }
-
-       if (tdb->methods->tdb_oob(tdb, off + len, 0) != 0)
-               return -1;
-
-       if (tdb->map_ptr) {
-               memcpy(off + (char *)tdb->map_ptr, buf, len);
-       } else {
-               ssize_t written = pwrite(tdb->fd, buf, len, off);
-               if ((written != (ssize_t)len) && (written != -1)) {
-                       /* try once more */
-                       tdb->ecode = TDB_ERR_IO;
-                       TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_write: wrote only "
-                                "%d of %d bytes at %d, trying once more\n",
-                                (int)written, len, off));
-                       written = pwrite(tdb->fd, (const char *)buf+written,
-                                        len-written,
-                                        off+written);
-               }
-               if (written == -1) {
-                       /* Ensure ecode is set for log fn. */
-                       tdb->ecode = TDB_ERR_IO;
-                       TDB_LOG((tdb, TDB_DEBUG_FATAL,"tdb_write failed at %d "
-                                "len=%d (%s)\n", off, len, strerror(errno)));
-                       return -1;
-               } else if (written != (ssize_t)len) {
-                       tdb->ecode = TDB_ERR_IO;
-                       TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_write: failed to "
-                                "write %d bytes at %d in two attempts\n",
-                                len, off));
-                       return -1;
-               }
-       }
-       return 0;
-}
-
-
-
-/*
-  do an unlocked scan of the hash table heads to find the next non-zero head. The value
-  will then be confirmed with the lock held
-*/             
-static void tdb_next_hash_chain(struct tdb_context *tdb, uint32_t *chain)
-{
-       uint32_t h = *chain;
-       if (tdb->map_ptr) {
-               for (;h < tdb->header.hash_size;h++) {
-                       if (0 != *(uint32_t *)(TDB_HASH_TOP(h) + (unsigned char *)tdb->map_ptr)) {
-                               break;
-                       }
-               }
-       } else {
-               uint32_t off=0;
-               for (;h < tdb->header.hash_size;h++) {
-                       if (tdb_ofs_read(tdb, TDB_HASH_TOP(h), &off) != 0 || off != 0) {
-                               break;
-                       }
-               }
-       }
-       (*chain) = h;
-}
-
-/* read/write a tdb_off_t */
-int tdb_ofs_read(struct tdb_context *tdb, tdb_off_t offset, tdb_off_t *d)
-{
-       return tdb->methods->tdb_read(tdb, offset, (char*)d, sizeof(*d), DOCONV());
-}
-
-int tdb_ofs_write(struct tdb_context *tdb, tdb_off_t offset, tdb_off_t *d)
-{
-       tdb_off_t off = *d;
-       return tdb->methods->tdb_write(tdb, offset, CONVERT(off), sizeof(*d));
-}
-
-
-/* read/write a record */
-int tdb_rec_read(struct tdb_context *tdb, tdb_off_t offset, struct tdb_record *rec)
-{
-       if (tdb->methods->tdb_read(tdb, offset, rec, sizeof(*rec),DOCONV()) == -1)
-               return -1;
-       if (TDB_BAD_MAGIC(rec)) {
-               /* Ensure ecode is set for log fn. */
-               tdb->ecode = TDB_ERR_CORRUPT;
-               TDB_LOG((tdb, TDB_DEBUG_FATAL,"tdb_rec_read bad magic 0x%x at offset=%d\n", rec->magic, offset));
-               return -1;
-       }
-       return tdb->methods->tdb_oob(tdb, rec->next+sizeof(*rec), 0);
-}
-
-int tdb_rec_write(struct tdb_context *tdb, tdb_off_t offset, struct tdb_record *rec)
-{
-       struct tdb_record r = *rec;
-       return tdb->methods->tdb_write(tdb, offset, CONVERT(r), sizeof(r));
-}
-#endif
-

 static void *tdb_direct(struct tdb_context *tdb, tdb_off_t off, size_t len)
 {
        if (unlikely(!tdb->map_ptr))
 static void *tdb_direct(struct tdb_context *tdb, tdb_off_t off, size_t len)
 {
        if (unlikely(!tdb->map_ptr))

diff --git a/ccan/tdb2/lock.c b/ccan/tdb2/lock.c
index a4cfd26c8c05da87540e0294aa2d9380ca7c4b5b..fe6072439f1c00c20ddf8005698c7608f7de2390 100644 (file)
--- a/ccan/tdb2/lock.c
+++ b/ccan/tdb2/lock.c
@@ -614,52 +614,6 @@ bool tdb_has_hash_locks(struct tdb_context *tdb)
        return false;
 }
 
        return false;
 }
 

-#if 0
-/* lock entire database with write lock */
-int tdb_lockall(struct tdb_context *tdb)
-{
-       tdb_trace(tdb, "tdb_lockall");
-       return tdb_allrecord_lock(tdb, F_WRLCK, TDB_LOCK_WAIT, false);
-}
-
-/* lock entire database with write lock - nonblocking varient */
-int tdb_lockall_nonblock(struct tdb_context *tdb)
-{
-       int ret = tdb_allrecord_lock(tdb, F_WRLCK, TDB_LOCK_NOWAIT, false);
-       tdb_trace_ret(tdb, "tdb_lockall_nonblock", ret);
-       return ret;
-}
-
-/* unlock entire database with write lock */
-int tdb_unlockall(struct tdb_context *tdb)
-{
-       tdb_trace(tdb, "tdb_unlockall");
-       return tdb_allrecord_unlock(tdb, F_WRLCK);
-}
-
-/* lock entire database with read lock */
-int tdb_lockall_read(struct tdb_context *tdb)
-{
-       tdb_trace(tdb, "tdb_lockall_read");
-       return tdb_allrecord_lock(tdb, F_RDLCK, TDB_LOCK_WAIT, false);
-}
-
-/* lock entire database with read lock - nonblock varient */
-int tdb_lockall_read_nonblock(struct tdb_context *tdb)
-{
-       int ret = tdb_allrecord_lock(tdb, F_RDLCK, TDB_LOCK_NOWAIT, false);
-       tdb_trace_ret(tdb, "tdb_lockall_read_nonblock", ret);
-       return ret;
-}
-
-/* unlock entire database with read lock */
-int tdb_unlockall_read(struct tdb_context *tdb)
-{
-       tdb_trace(tdb, "tdb_unlockall_read");
-       return tdb_allrecord_unlock(tdb, F_RDLCK);
-}
-#endif
-

 static bool tdb_has_free_lock(struct tdb_context *tdb)
 {
        unsigned int i;
 static bool tdb_has_free_lock(struct tdb_context *tdb)
 {
        unsigned int i;


@@ -781,117 +735,6 @@ void tdb_unlock_free_bucket(struct tdb_context *tdb, tdb_off_t b_off)
        tdb_nest_unlock(tdb, free_lock_off(b_off), F_WRLCK);
 }
 
        tdb_nest_unlock(tdb, free_lock_off(b_off), F_WRLCK);
 }
 

-#if 0
-/* lock/unlock one hash chain, non-blocking. This is meant to be used
-   to reduce contention - it cannot guarantee how many records will be
-   locked */
-int tdb_chainlock_nonblock(struct tdb_context *tdb, TDB_DATA key)
-{
-       return chainlock(tdb, &key, F_WRLCK, TDB_LOCK_NOWAIT,
-                        "tdb_chainlock_nonblock");
-}
-
-int tdb_chainlock_read(struct tdb_context *tdb, TDB_DATA key)
-{
-       return chainlock(tdb, &key, F_RDLCK, TDB_LOCK_WAIT,
-                        "tdb_chainlock_read");
-}
-
-int tdb_chainunlock_read(struct tdb_context *tdb, TDB_DATA key)
-{
-       uint64_t h = tdb_hash(tdb, key.dptr, key.dsize);
-       tdb_trace_1rec(tdb, "tdb_chainunlock_read", key);
-       return tdb_unlock_list(tdb, h & ((1ULL << tdb->header.v.hash_bits)-1),
-                              F_RDLCK);
-}
-
-/* record lock stops delete underneath */
-int tdb_lock_record(struct tdb_context *tdb, tdb_off_t off)
-{
-       if (tdb->allrecord_lock.count) {
-               return 0;
-       }
-       return off ? tdb_brlock(tdb, F_RDLCK, off, 1, TDB_LOCK_WAIT) : 0;
-}
-
-/*
-  Write locks override our own fcntl readlocks, so check it here.
-  Note this is meant to be F_SETLK, *not* F_SETLKW, as it's not
-  an error to fail to get the lock here.
-*/
-int tdb_write_lock_record(struct tdb_context *tdb, tdb_off_t off)
-{
-       struct tdb_traverse_lock *i;
-       for (i = &tdb->travlocks; i; i = i->next)
-               if (i->off == off)
-                       return -1;
-       if (tdb->allrecord_lock.count) {
-               if (tdb->allrecord_lock.ltype == F_WRLCK) {
-                       return 0;
-               }
-               return -1;
-       }
-       return tdb_brlock(tdb, F_WRLCK, off, 1, TDB_LOCK_NOWAIT|TDB_LOCK_PROBE);
-}
-
-int tdb_write_unlock_record(struct tdb_context *tdb, tdb_off_t off)
-{
-       if (tdb->allrecord_lock.count) {
-               return 0;
-       }
-       return tdb_brunlock(tdb, F_WRLCK, off, 1);
-}
-
-/* fcntl locks don't stack: avoid unlocking someone else's */
-int tdb_unlock_record(struct tdb_context *tdb, tdb_off_t off)
-{
-       struct tdb_traverse_lock *i;
-       uint32_t count = 0;
-
-       if (tdb->allrecord_lock.count) {
-               return 0;
-       }
-
-       if (off == 0)
-               return 0;
-       for (i = &tdb->travlocks; i; i = i->next)
-               if (i->off == off)
-                       count++;
-       return (count == 1 ? tdb_brunlock(tdb, F_RDLCK, off, 1) : 0);
-}
-
-/* The transaction code uses this to remove all locks. */
-void tdb_release_transaction_locks(struct tdb_context *tdb)
-{
-       unsigned int i;
-
-       if (tdb->allrecord_lock.count != 0) {
-               tdb_off_t hash_size, free_size;
-
-               hash_size = (1ULL << tdb->header.v.hash_bits)
-                       * sizeof(tdb_off_t);
-               free_size = tdb->header.v.free_zones 
-                       * (tdb->header.v.free_buckets + 1) * sizeof(tdb_off_t);
-
-               tdb_brunlock(tdb, tdb->allrecord_lock.ltype,
-                            tdb->header.v.hash_off, hash_size);
-               tdb_brunlock(tdb, tdb->allrecord_lock.ltype,
-                            tdb->header.v.free_off, free_size);
-               tdb->allrecord_lock.count = 0;
-               tdb->allrecord_lock.ltype = 0;
-       }
-
-       for (i = 0; i<tdb->num_lockrecs; i++) {
-               struct tdb_lock_type *lck = &tdb->lockrecs[i];
-
-               tdb_brunlock(tdb, lck->ltype, lck->off, 1);
-       }
-       tdb->num_lockrecs = 0;
-       SAFE_FREE(tdb->lockrecs);
-       tdb->header_uptodate = false;
-}
-#endif
-

 void tdb_lock_init(struct tdb_context *tdb)
 {
        tdb->num_lockrecs = 0;
 void tdb_lock_init(struct tdb_context *tdb)
 {
        tdb->num_lockrecs = 0;

diff --git a/ccan/tdb2/private.h b/ccan/tdb2/private.h
index 46a0e051201cb05c7999bc1f361d1ea0956bb4c0..22014759f2b61e6534342e6496a5b2622bfc68ca 100644 (file)
--- a/ccan/tdb2/private.h
+++ b/ccan/tdb2/private.h
@@ -507,59 +507,6 @@ int next_in_hash(struct tdb_context *tdb, int ltype,
 int tdb_transaction_recover(struct tdb_context *tdb);
 bool tdb_needs_recovery(struct tdb_context *tdb);
 
 int tdb_transaction_recover(struct tdb_context *tdb);
 bool tdb_needs_recovery(struct tdb_context *tdb);
 

-#if 0
-/* Low-level locking primitives. */
-int tdb_nest_lock(struct tdb_context *tdb, tdb_off_t offset, int ltype,
-                 enum tdb_lock_flags flags);
-int tdb_nest_unlock(struct tdb_context *tdb, tdb_off_t offset, int ltype);
-
-int tdb_munmap(struct tdb_context *tdb);
-void tdb_mmap(struct tdb_context *tdb);
-int tdb_lock(struct tdb_context *tdb, int list, int ltype);
-int tdb_lock_nonblock(struct tdb_context *tdb, int list, int ltype);
-bool tdb_have_locks(struct tdb_context *tdb);
-int tdb_unlock(struct tdb_context *tdb, int list, int ltype);
-int tdb_brlock(struct tdb_context *tdb,
-              int rw_type, tdb_off_t offset, size_t len,
-              enum tdb_lock_flags flags);
-int tdb_brunlock(struct tdb_context *tdb,
-                int rw_type, tdb_off_t offset, size_t len);
-bool tdb_have_extra_locks(struct tdb_context *tdb);
-void tdb_release_extra_locks(struct tdb_context *tdb);
-int tdb_transaction_lock(struct tdb_context *tdb, int ltype);
-int tdb_transaction_unlock(struct tdb_context *tdb, int ltype);
-int tdb_allrecord_lock(struct tdb_context *tdb, int ltype,
-                      enum tdb_lock_flags flags, bool upgradable);
-int tdb_allrecord_unlock(struct tdb_context *tdb, int ltype);
-int tdb_allrecord_upgrade(struct tdb_context *tdb);
-int tdb_write_lock_record(struct tdb_context *tdb, tdb_off_t off);
-int tdb_write_unlock_record(struct tdb_context *tdb, tdb_off_t off);
-int tdb_ofs_read(struct tdb_context *tdb, tdb_off_t offset, tdb_off_t *d);
-int tdb_ofs_write(struct tdb_context *tdb, tdb_off_t offset, tdb_off_t *d);
-int tdb_free(struct tdb_context *tdb, tdb_off_t offset, struct tdb_record *rec);
-tdb_off_t tdb_allocate(struct tdb_context *tdb, tdb_len_t length, struct tdb_record *rec);
-int tdb_ofs_read(struct tdb_context *tdb, tdb_off_t offset, tdb_off_t *d);
-int tdb_ofs_write(struct tdb_context *tdb, tdb_off_t offset, tdb_off_t *d);
-int tdb_lock_record(struct tdb_context *tdb, tdb_off_t off);
-int tdb_unlock_record(struct tdb_context *tdb, tdb_off_t off);
-bool tdb_needs_recovery(struct tdb_context *tdb);
-int tdb_rec_read(struct tdb_context *tdb, tdb_off_t offset, struct tdb_record *rec);
-int tdb_rec_write(struct tdb_context *tdb, tdb_off_t offset, struct tdb_record *rec);
-int tdb_do_delete(struct tdb_context *tdb, tdb_off_t rec_ptr, struct tdb_record *rec);
-unsigned char *tdb_alloc_read(struct tdb_context *tdb, tdb_off_t offset, tdb_len_t len);
-int tdb_parse_data(struct tdb_context *tdb, TDB_DATA key,
-                  tdb_off_t offset, tdb_len_t len,
-                  int (*parser)(TDB_DATA key, TDB_DATA data,
-                                void *private_data),
-                  void *private_data);
-tdb_off_t tdb_find_lock_hash(struct tdb_context *tdb, TDB_DATA key, uint32_t hash, int locktype,
-                          struct tdb_record *rec);
-void tdb_io_init(struct tdb_context *tdb);
-int tdb_expand(struct tdb_context *tdb, tdb_off_t size);
-int tdb_rec_free_read(struct tdb_context *tdb, tdb_off_t off,
-                     struct tdb_record *rec);
-#endif
-

 #ifdef TDB_TRACE
 void tdb_trace(struct tdb_context *tdb, const char *op);
 void tdb_trace_seqnum(struct tdb_context *tdb, uint32_t seqnum, const char *op);
 #ifdef TDB_TRACE
 void tdb_trace(struct tdb_context *tdb, const char *op);
 void tdb_trace_seqnum(struct tdb_context *tdb, uint32_t seqnum, const char *op);