cluster/afr: split-brain resolution CLI

Extend the AFR heal command to include automated split-brain resolution.

This patch [3/3] is the final patch for afr automated split-brain resolution
implementation.

"gluster volume heal <VOLNAME> [full | statistics [heal-count [replica
<HOSTNAME:BRICKNAME>]] |info [healed | heal-failed | split-brain]| split-brain
{bigger-file <FILE> |source-brick <HOSTNAME:BRICKNAME> [<FILE>]}]"

The new additions being:
1.gluster volume heal <VOLNAME> split-brain bigger-file <FILE>
Locates the replica containing the FILE, selects bigger-file as source and
completes heal.

2.gluster volume heal <VOLNAME> split-brain source-brick <HOSTNAME:BRICKNAME>
<FILE>
Selects <FILE> present in <HOSTNAME:BRICKNAME> as source and completes heal.

3.gluster volume heal <VOLNAME> split-brain <HOSTNAME:BRICKNAME>
Selects all split-brained files in <HOSTNAME:BRICKNAME> as source and completes
heal.

Note: <FILE> can be either the full file name as seen from the root of the
volume (or) the gfid-string representation of the file, which sometimes gets
displayed in the heal info command's output.

Entry/gfid split-brain resolution is not supported.

Example can be found in the test case.

Change-Id: I4649733922d406f14f28ee9033a5cb627b9538b3
BUG: 1136769
Signed-off-by: Ravishankar N <ravishankar@redhat.com>
Reviewed-on: http://review.gluster.org/9377
Reviewed-by: Pranith Kumar Karampuri <pkarampu@redhat.com>
Tested-by: Pranith Kumar Karampuri <pkarampu@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>

1 files changed, 18 insertions, 0 deletions

diff --git a/xlators/cluster/afr/src/afr-self-heal.h b/xlators/cluster/afr/src/afr-self-heal.h
index 50cff91ccb3..74cc9608cf6 100644
--- a/xlators/cluster/afr/src/afr-self-heal.h
+++ b/xlators/cluster/afr/src/afr-self-heal.h
@@ -193,10 +193,28 @@ afr_log_selfheal (uuid_t gfid, xlator_t *this, int ret, char *type,
                   int source, unsigned char *healed_sinks);
 
 void
+afr_mark_largest_file_as_source (xlator_t *this, unsigned char *sources,
+                                 struct afr_reply *replies);
+void
 afr_mark_active_sinks (xlator_t *this, unsigned char *sources,
                        unsigned char *locked_on, unsigned char *sinks);
 
 gf_boolean_t
+afr_dict_contains_heal_op (call_frame_t *frame);
+
+int
+afr_mark_split_brain_source_sinks (call_frame_t *frame, xlator_t *this,
+                                   unsigned char *sources,
+                                   unsigned char *sinks,
+                                   unsigned char *healed_sinks,
+                                   unsigned char *locked_on,
+                                   struct afr_reply *replies,
+                                   afr_transaction_type type);
+
+int
+afr_get_child_index_from_name (xlator_t *this, char *name);
+
+gf_boolean_t
 afr_does_witness_exist (xlator_t *this, uint64_t *witness);
 
 int