tier:delete the linkfile if data file creation fails

If we are creating data file in a hot subvolume
then we will create a linkfile in cold subvolume.
Linkfile creation happens first. If linkfile creation
was successful and data file creation failed, then
linkfile in cold subvolume will become stale.

This patch will delete the linkfile as well, if data
file creation fails.

Also this code duplicates dht_create to make tier_create

Change-Id: I377a90dad47f288e9576c7323b23cf694a91a7a3
BUG: 1290677
Signed-off-by: Mohammed Rafi KC <rkavunga@redhat.com>
Reviewed-on: http://review.gluster.org/12948
Reviewed-by: N Balachandran <nbalacha@redhat.com>
Tested-by: NetBSD Build System <jenkins@build.gluster.org>
Reviewed-by: Raghavendra G <rgowdapp@redhat.com>
Reviewed-by: Dan Lambright <dlambrig@redhat.com>
Tested-by: Dan Lambright <dlambrig@redhat.com>

1 files changed, 0 insertions, 81 deletions

diff --git a/xlators/cluster/dht/src/dht-common.c b/xlators/cluster/dht/src/dht-common.c
index 39da4323d8e..eb7ca32632a 100644
--- a/xlators/cluster/dht/src/dht-common.c
+++ b/xlators/cluster/dht/src/dht-common.c
@@ -6038,82 +6038,6 @@ err:
         return 0;
 }
 
-gf_boolean_t
-dht_is_hot_tier_decommissioned (xlator_t *this)
-{
-        dht_conf_t              *conf        = NULL;
-        xlator_t                *hot_tier    = NULL;
-        int                      i           = 0;
-
-        conf = this->private;
-        hot_tier = conf->subvolumes[1];
-
-        if (conf->decommission_subvols_cnt) {
-                for (i = 0; i < conf->subvolume_cnt; i++) {
-                        if (conf->decommissioned_bricks[i] &&
-                                conf->decommissioned_bricks[i] == hot_tier)
-                                return _gf_true;
-                }
-        }
-
-        return _gf_false;
-}
-
-int
-dht_create_tier_wind_to_avail_subvol (call_frame_t *frame, xlator_t *this,
-                                      xlator_t *subvol, loc_t *loc, int32_t flags,
-                                      mode_t mode, mode_t umask, fd_t *fd,
-                                      dict_t *params)
-{
-        xlator_t                *hot_subvol  = NULL;
-        xlator_t                *cold_subvol = NULL;
-        dht_conf_t              *conf        = NULL;
-        dht_local_t             *local       = NULL;
-
-        local = frame->local;
-
-        conf = this->private;
-
-        cold_subvol = subvol;
-        hot_subvol = conf->subvolumes[1];
-        if (conf->subvolumes[0] != cold_subvol) {
-                hot_subvol = conf->subvolumes[0];
-        }
-        /*
-         * if hot tier full, write to cold.
-         * Also if hot tier is full, create in cold
-         */
-        if (dht_is_subvol_filled (this, hot_subvol) ||
-            dht_is_hot_tier_decommissioned (this)) {
-                gf_msg_debug (this->name, 0,
-                              "creating %s on %s", loc->path,
-                              cold_subvol->name);
-
-                STACK_WIND (frame, dht_create_cbk,
-                            cold_subvol, cold_subvol->fops->create,
-                            loc, flags, mode, umask, fd, params);
-        } else {
-                local->params = dict_ref (params);
-                local->flags = flags;
-                local->mode = mode;
-                local->umask = umask;
-                local->cached_subvol = hot_subvol;
-                local->hashed_subvol = cold_subvol;
-
-                gf_msg_debug (this->name, 0,
-                              "creating %s on %s (link at %s)", loc->path,
-                              hot_subvol->name, cold_subvol->name);
-
-                dht_linkfile_create (frame, dht_create_linkfile_create_cbk,
-                                     this, hot_subvol, cold_subvol, loc);
-
-                goto out;
-        }
-out:
-        return 0;
-}
-
-
 int
 dht_create_wind_to_avail_subvol (call_frame_t *frame, xlator_t *this,
                                  xlator_t *subvol, loc_t *loc, int32_t flags,
@@ -6125,11 +6049,6 @@ dht_create_wind_to_avail_subvol (call_frame_t *frame, xlator_t *this,
 
         local = frame->local;
 
-        if (strcmp (this->type, "cluster/tier") == 0)
-                return dht_create_tier_wind_to_avail_subvol(frame, this, subvol,
-                                                            loc, flags, mode,
-                                                            umask, fd, params);
-
         if (!dht_is_subvol_filled (this, subvol)) {
                 gf_msg_debug (this->name, 0,
                               "creating %s on %s", loc->path,