diff options
| author | Susant Palai <spalai@redhat.com> | 2018-01-18 13:06:12 +0530 |
|---|---|---|
| committer | Raghavendra G <rgowdapp@redhat.com> | 2018-02-02 15:24:38 +0000 |
| commit | 545a7ce6762a1b3a7b989b43a9d18b5b1b299df0 (patch) | |
| tree | 0f2c3015697553914cb520dbda107f3843521f53 /libglusterfs | |
| parent | d9f773ba719397c12860f494a8cd38109e4b2fe3 (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')
| -rw-r--r-- | libglusterfs/src/globals.h | 5 |
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 |