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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 /libglusterfs
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 'libglusterfs')
-rw-r--r--libglusterfs/src/syncop.c32
-rw-r--r--libglusterfs/src/syncop.h2
-rw-r--r--libglusterfs/src/xlator.c3
3 files changed, 35 insertions, 2 deletions
diff --git a/libglusterfs/src/syncop.c b/libglusterfs/src/syncop.c
index 7b6f782..712e5b1 100644
--- a/libglusterfs/src/syncop.c
+++ b/libglusterfs/src/syncop.c
@@ -938,6 +938,38 @@ syncop_unlink (xlator_t *subvol, loc_t *loc)
}
int
+syncop_link_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int32_t op_ret, int32_t op_errno, inode_t *inode,
+ struct iatt *buf, struct iatt *preparent,
+ struct iatt *postparent)
+{
+ struct syncargs *args = NULL;
+
+ args = cookie;
+
+ args->op_ret = op_ret;
+ args->op_errno = op_errno;
+
+ __wake (args);
+
+ return 0;
+}
+
+
+int
+syncop_link (xlator_t *subvol, loc_t *oldloc, loc_t *newloc)
+{
+ struct syncargs args = {0, };
+
+ SYNCOP (subvol, (&args), syncop_link_cbk, subvol->fops->link,
+ oldloc, newloc);
+
+ errno = args.op_errno;
+
+ return args.op_ret;
+}
+
+int
syncop_ftruncate_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
int op_ret, int op_errno, struct iatt *prebuf,
struct iatt *postbuf)
diff --git a/libglusterfs/src/syncop.h b/libglusterfs/src/syncop.h
index 627fb61..7d8a2cb 100644
--- a/libglusterfs/src/syncop.h
+++ b/libglusterfs/src/syncop.h
@@ -217,5 +217,5 @@ int syncop_symlink (xlator_t *subvol, loc_t *loc, char *newpath, dict_t *dict);
int syncop_readlink (xlator_t *subvol, loc_t *loc, char **buffer, size_t size);
int syncop_mknod (xlator_t *subvol, loc_t *loc, mode_t mode, dev_t rdev,
dict_t *dict);
-
+int syncop_link (xlator_t *subvol, loc_t *oldloc, loc_t *newloc);
#endif /* _SYNCOP_H */
diff --git a/libglusterfs/src/xlator.c b/libglusterfs/src/xlator.c
index 4283576..01475f5 100644
--- a/libglusterfs/src/xlator.c
+++ b/libglusterfs/src/xlator.c
@@ -567,7 +567,8 @@ loc_copy (loc_t *dst, loc_t *src)
if (src->parent)
dst->parent = inode_ref (src->parent);
- dst->path = gf_strdup (src->path);
+ if (src->path)
+ dst->path = gf_strdup (src->path);
if (!dst->path)
goto out;