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authorSusant Palai <spalai@redhat.com>2018-01-18 13:06:12 +0530
committerRaghavendra G <rgowdapp@redhat.com>2018-02-02 15:24:38 +0000
commit545a7ce6762a1b3a7b989b43a9d18b5b1b299df0 (patch)
tree0f2c3015697553914cb520dbda107f3843521f53 /libglusterfs/src
parentd9f773ba719397c12860f494a8cd38109e4b2fe3 (diff)
cluster/dht: avoid overwriting client writes during migration
For more details on this issue see https://github.com/gluster/glusterfs/issues/308 Solution: This is a restrictive solution where a file will not be migrated if a client writes to it during the migration. This does not check if the writes from the rebalance and the client actually do overlap. If dht_writev_cbk finds that the file is being migrated (PHASE1) it will set an xattr on the destination file indicating the file was updated by a non-rebalance client. Rebalance checks if any other client has written to the dst file and aborts the file migration if it finds the xattr. updates gluster/glusterfs#308 Change-Id: I73aec28bc9dbb8da57c7425ec88c6b6af0fbc9dd Signed-off-by: Susant Palai <spalai@redhat.com> Signed-off-by: Raghavendra G <rgowdapp@redhat.com> Signed-off-by: N Balachandran <nbalacha@redhat.com>
Diffstat (limited to 'libglusterfs/src')
-rw-r--r--libglusterfs/src/globals.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/libglusterfs/src/globals.h b/libglusterfs/src/globals.h
index 315eec1e667..487facd9183 100644
--- a/libglusterfs/src/globals.h
+++ b/libglusterfs/src/globals.h
@@ -19,6 +19,11 @@
#define GD_MIN_OP_VERSION_KEY "minimum-operating-version"
#define GD_MAX_OP_VERSION_KEY "maximum-operating-version"
+#define GF_PROTECT_FROM_EXTERNAL_WRITES "trusted.glusterfs.protect.writes"
+#define GF_AVOID_OVERWRITE "glusterfs.avoid.overwrite"
+#define GF_CLEAN_WRITE_PROTECTION "glusterfs.clean.writexattr"
+
+
/* Gluster versions - OP-VERSION mapping
*
* 3.3.x - 1