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authorshishir gowda <shishirng@gluster.com>2012-02-17 19:21:07 +0530
committerVijay Bellur <vijay@gluster.com>2012-02-19 04:47:50 -0800
commit4a65356275cda45f665dfa99d3712f6fb9087aff (patch)
tree43a58dd347e770073d26c13fd54522e3825d957b /xlators/cluster/dht/src/dht-common.h
parent6123265556e54891369cc79a72b670a4b23a8a41 (diff)
cluster/dht: Support for hardlink rebalance when decommissioning
The support for hardlink rebalance is only available for decommissioning of a node. this can be triggered in two ways 1. remove-brick start 2. if decommission node value is set in vol file, then a normal rebalance command The way we handle it is- if (nlink > 1) do * if src file doesnt have linkto xattr * mark src's linkto to the dst * else * perform a link on the dst * do a look up * if nlinks = dst.nlinks * migrate data * else * continue crawling done Signed-off-by: shishir gowda <shishirng@gluster.com> Change-Id: If43b5524b872fd1413e9f7aa7f436cb244e30d8d BUG: 763844 Reviewed-on: http://review.gluster.com/2737 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Amar Tumballi <amarts@redhat.com>
Diffstat (limited to 'xlators/cluster/dht/src/dht-common.h')
-rw-r--r--xlators/cluster/dht/src/dht-common.h13
1 files changed, 13 insertions, 0 deletions
diff --git a/xlators/cluster/dht/src/dht-common.h b/xlators/cluster/dht/src/dht-common.h
index e44c947dd..2ccdea747 100644
--- a/xlators/cluster/dht/src/dht-common.h
+++ b/xlators/cluster/dht/src/dht-common.h
@@ -245,6 +245,7 @@ struct dht_conf {
/* to keep track of nodes which are decomissioned */
xlator_t **decommissioned_bricks;
+ int decommission_in_progress;
/* defrag related */
gf_defrag_info_t *defrag;
@@ -262,6 +263,12 @@ struct dht_disk_layout {
};
typedef struct dht_disk_layout dht_disk_layout_t;
+typedef enum {
+ GF_DHT_MIGRATE_DATA,
+ GF_DHT_MIGRATE_DATA_EVEN_IF_LINK_EXISTS,
+ GF_DHT_MIGRATE_HARDLINK,
+ GF_DHT_MIGRATE_HARDLINK_IN_PROGRESS
+} gf_dht_migrate_data_type_t;
#define ENTRY_MISSING(op_ret, op_errno) (op_ret == -1 && op_errno == ENOENT)
@@ -655,4 +662,10 @@ gf_defrag_stop (gf_defrag_info_t *defrag, dict_t *output);
void*
gf_defrag_start (void *this);
+int32_t
+gf_defrag_handle_hardlink (xlator_t *this, loc_t *loc, dict_t *xattrs,
+ struct iatt *stbuf);
+int
+dht_migrate_file (xlator_t *this, loc_t *loc, xlator_t *from, xlator_t *to,
+ int flag);
#endif/* _DHT_H */