diff options
| author | N Balachandran <nbalacha@redhat.com> | 2018-02-19 09:44:29 +0530 |
|---|---|---|
| committer | Raghavendra G <rgowdapp@redhat.com> | 2018-02-22 10:51:30 +0000 |
| commit | efbfd17dfc73c4e6055adeffc65be1697f094168 (patch) | |
| tree | 679971dd642c7d7a7a855837ed4ac369d5b945bd | |
| parent | 475286ec7f9fbaea6b10a549119730f89e282cec (diff) | |
cluster/dht: Handle single dht child in dht_lookup
This patch limits itself to only handling the case
where no file (data or linkto) exists on the subvol.
Additional cases to be handled:
1. A linkto file was found on the only child subvol. This currently
calls dht_lookup_everywhere which eventually deletes it. It can be
deleted directly as it will not be pointing to a valid subvol.
2. Directory lookups - locking might be unnecessary in some cases.
Change-Id: I940ba34531f2aaee1d36fd9ca45ecfd46be662a4
BUG: 1546620
Signed-off-by: N Balachandran <nbalacha@redhat.com>
| -rw-r--r-- | xlators/cluster/dht/src/dht-common.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/xlators/cluster/dht/src/dht-common.c b/xlators/cluster/dht/src/dht-common.c index 445bd590c4d..b106d4e4e1a 100644 --- a/xlators/cluster/dht/src/dht-common.c +++ b/xlators/cluster/dht/src/dht-common.c @@ -3027,6 +3027,12 @@ dht_lookup_cbk (call_frame_t *frame, void *cookie, xlator_t *this, } if (ENTRY_MISSING (op_ret, op_errno)) { + + if (1 == conf->subvolume_cnt) { + /* No need to lookup again */ + goto out; + } + gf_msg_debug (this->name, 0, "Entry %s missing on subvol %s", loc->path, prev->name); @@ -3266,6 +3272,9 @@ dht_lookup (call_frame_t *frame, xlator_t *this, "path %s", conf->mds_xattr_key, loc->path); } + + /* Nameless lookup */ + if (gf_uuid_is_null (loc->pargfid) && !gf_uuid_is_null (loc->gfid) && !__is_root_gfid (loc->inode->gfid)) { local->cached_subvol = NULL; @@ -3283,6 +3292,9 @@ dht_lookup (call_frame_t *frame, xlator_t *this, hashed_subvol = dht_subvol_get_hashed (this, loc); local->hashed_subvol = hashed_subvol; + + /* The entry has been looked up before and has an inode_ctx set + */ if (is_revalidate (loc)) { layout = local->layout; if (!layout) { @@ -3323,6 +3335,7 @@ dht_lookup (call_frame_t *frame, xlator_t *this, "path %s", conf->xattr_name, loc->path); goto err; } + /* need it in case file is not found on cached file * on revalidate path and we may encounter linkto files on * with dht_lookup_everywhere*/ |