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authorKotresh HR <khiremat@redhat.com>2019-03-28 07:17:16 -0400
committerAmar Tumballi <amarts@redhat.com>2019-03-29 07:23:41 +0000
commit877af725b3e35b548d6d7aeec5adb21721d8bf8b (patch)
treec8d7f9a639a3f9df88eb6f75a9533e1935ceecb2 /geo-replication
parent6ae36418834ddcd9f68fe7ef9b09b077cdf68ca3 (diff)
geo-rep: Fix syncing multiple rename of symlink
Problem: Geo-rep fails to sync rename of symlink if it's renamed multiple times if creation and rename happened successively Worker crash at slave: Traceback (most recent call last): File "/usr/libexec/glusterfs/python/syncdaemon/repce.py", in worker res = getattr(self.obj, rmeth)(*in_data[2:]) File "/usr/libexec/glusterfs/python/syncdaemon/resource.py", in entry_ops [ESTALE, EINVAL, EBUSY]) File "/usr/libexec/glusterfs/python/syncdaemon/syncdutils.py", in errno_wrap return call(*arg) File "/usr/libexec/glusterfs/python/syncdaemon/libcxattr.py", in lsetxattr cls.raise_oserr() File "/usr/libexec/glusterfs/python/syncdaemon/libcxattr.py", in raise_oserr raise OSError(errn, os.strerror(errn)) OSError: [Errno 12] Cannot allocate memory Geo-rep Behaviour: 1. SYMLINK doesn't record target path in changelog. So while syncing SYMLINK, readlink is done on master to get target path. 2. Geo-rep will create destination if source is not present while syncing RENAME. Hence while syncing RENAME of SYMLINK, target path is collected from destination. Cause: If symlink is created and renamed multiple times, creation of symlink is ignored, as it's no longer present on master at that path. While symlink is renamed multiple times at master, when syncing first RENAME of SYMLINK, both source and destination is not present, hence target path is not known. In this case, while creating destination directly at slave, regular file attributes were encoded into blob instead of symlink, causing failure in gfid-access translator while decoding blob. Solution: While syncing of RENAME of SYMLINK, when target is not known and when src and destination is not present on the master, don't create destination. Ignore the rename. It's ok to ignore. If it's unliked, it's fine. If it's renamed to something else, it will be synced then. Change-Id: Ibdfa495513b7c05b5370ab0b89c69a6802338d87 fixes: bz#1693648 Signed-off-by: Kotresh HR <khiremat@redhat.com>
Diffstat (limited to 'geo-replication')
-rw-r--r--geo-replication/syncdaemon/resource.py23
1 files changed, 14 insertions, 9 deletions
diff --git a/geo-replication/syncdaemon/resource.py b/geo-replication/syncdaemon/resource.py
index a2d0b16899a..c290d86880e 100644
--- a/geo-replication/syncdaemon/resource.py
+++ b/geo-replication/syncdaemon/resource.py
@@ -625,15 +625,20 @@ class Server(object):
# exist with different gfid.
if not matching_disk_gfid(gfid, entry):
if e['stat'] and not stat.S_ISDIR(e['stat']['mode']):
- if stat.S_ISLNK(e['stat']['mode']) and \
- e['link'] is not None:
- st1 = lstat(en)
- if isinstance(st1, int):
- (pg, bname) = entry2pb(en)
- blob = entry_pack_symlink(cls, gfid, bname,
- e['link'], e['stat'])
- elif not matching_disk_gfid(gfid, en):
- collect_failure(e, EEXIST, uid, gid, True)
+ if stat.S_ISLNK(e['stat']['mode']):
+ # src is not present, so don't sync symlink as
+ # we don't know target. It's ok to ignore. If
+ # it's unliked, it's fine. If it's renamed to
+ # something else, it will be synced then.
+ if e['link'] is not None:
+ st1 = lstat(en)
+ if isinstance(st1, int):
+ (pg, bname) = entry2pb(en)
+ blob = entry_pack_symlink(cls, gfid, bname,
+ e['link'],
+ e['stat'])
+ elif not matching_disk_gfid(gfid, en):
+ collect_failure(e, EEXIST, uid, gid, True)
else:
slink = os.path.join(pfx, gfid)
st = lstat(slink)