tdb: tdb_allrecord_lock/tdb_allrecord_unlock/tdb_allrecord_upgrade

[ccan] / ccan / tdb / open.c

diff --git a/ccan/tdb/open.c b/ccan/tdb/open.c
index d1a34bf1a2a47172fb4d534c134d0fb52aeeec29..bfa26dec58fd256db124fcd18ca9c50598ea4fe7 100644 (file)
--- a/ccan/tdb/open.c
+++ b/ccan/tdb/open.c
@@ -240,7 +240,7 @@ struct tdb_context *tdb_open_ex(const char *name, int hash_size, int tdb_flags,
         fcntl(tdb->fd, F_SETFD, v | FD_CLOEXEC);
 
        /* ensure there is only one process initialising at once */
-       if (tdb->methods->brlock(tdb, F_WRLCK, OPEN_LOCK, 1, TDB_LOCK_WAIT) == -1) {
+       if (tdb_nest_lock(tdb, OPEN_LOCK, F_WRLCK, TDB_LOCK_WAIT) == -1) {
                TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_open_ex: failed to get open lock on %s: %s\n",
                         name, strerror(errno)));
                goto fail;      /* errno set by tdb_brlock */
@@ -249,7 +249,7 @@ struct tdb_context *tdb_open_ex(const char *name, int hash_size, int tdb_flags,
        /* we need to zero database if we are the only one with it open */
        if ((tdb_flags & TDB_CLEAR_IF_FIRST) &&
            (!tdb->read_only) &&
-           (locked = (tdb->methods->brlock(tdb, F_WRLCK, ACTIVE_LOCK, 1, TDB_LOCK_NOWAIT|TDB_LOCK_PROBE) == 0))) {
+           (locked = (tdb_nest_lock(tdb, ACTIVE_LOCK, F_WRLCK, TDB_LOCK_NOWAIT|TDB_LOCK_PROBE) == 0))) {
                open_flags |= O_CREAT;
                if (ftruncate(tdb->fd, 0) == -1) {
                        TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_open_ex: "
@@ -312,7 +312,7 @@ struct tdb_context *tdb_open_ex(const char *name, int hash_size, int tdb_flags,
        tdb->inode = st.st_ino;
        tdb_mmap(tdb);
        if (locked) {
-               if (tdb->methods->brunlock(tdb, F_WRLCK, ACTIVE_LOCK, 1) == -1) {
+               if (tdb_nest_unlock(tdb, ACTIVE_LOCK, F_WRLCK, false) == -1) {
                        TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_open_ex: "
                                 "failed to take ACTIVE_LOCK on %s: %s\n",
                                 name, strerror(errno)));
@@ -327,8 +327,9 @@ struct tdb_context *tdb_open_ex(const char *name, int hash_size, int tdb_flags,
 
        if (tdb_flags & TDB_CLEAR_IF_FIRST) {
                /* leave this lock in place to indicate it's in use */
-               if (tdb->methods->brlock(tdb, F_RDLCK, ACTIVE_LOCK, 1, TDB_LOCK_WAIT) == -1)
+               if (tdb_nest_lock(tdb, ACTIVE_LOCK, F_RDLCK, TDB_LOCK_WAIT) == -1) {
                        goto fail;
+               }
        }
 
        /* if needed, run recovery */
@@ -356,8 +357,9 @@ struct tdb_context *tdb_open_ex(const char *name, int hash_size, int tdb_flags,
        /* Internal (memory-only) databases skip all the code above to
         * do with disk files, and resume here by releasing their
         * open lock and hooking into the active list. */
-       if (tdb->methods->brunlock(tdb, F_WRLCK, OPEN_LOCK, 1) == -1)
+       if (tdb_nest_unlock(tdb, OPEN_LOCK, F_WRLCK, false) == -1) {
                goto fail;
+       }
        tdb->next = tdbs;
        tdbs = tdb;
        return tdb;
@@ -381,6 +383,7 @@ struct tdb_context *tdb_open_ex(const char *name, int hash_size, int tdb_flags,
        if (tdb->fd != -1)
                if (close(tdb->fd) != 0)
                        TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_open_ex: failed to close tdb->fd on error!\n"));
+       SAFE_FREE(tdb->lockrecs);
        SAFE_FREE(tdb);
        errno = save_errno;
        return NULL;
@@ -461,7 +464,7 @@ static int tdb_reopen_internal(struct tdb_context *tdb, bool active_lock)
                return 0; /* Nothing to do. */
        }
 
-       if (tdb->num_locks != 0 || tdb->allrecord_lock.count) {
+       if (tdb_have_extra_locks(tdb)) {
                TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_reopen: reopen not allowed with locks held\n"));
                goto fail;
        }
@@ -492,8 +495,11 @@ static int tdb_reopen_internal(struct tdb_context *tdb, bool active_lock)
        }
        tdb_mmap(tdb);
 
-       if (active_lock &&
-           (tdb->methods->brlock(tdb, F_RDLCK, ACTIVE_LOCK, 1, TDB_LOCK_WAIT) == -1)) {
+       /* We may still think we hold the active lock. */
+       tdb->num_lockrecs = 0;
+       SAFE_FREE(tdb->lockrecs);
+
+       if (active_lock && tdb_nest_lock(tdb, ACTIVE_LOCK, F_RDLCK, TDB_LOCK_WAIT) == -1) {
                TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_reopen: failed to obtain active lock\n"));
                goto fail;
        }