cluster/afr: CLI for granular entry heal enablement/disablement

        Backport of: http://review.gluster.org/15747
When there are already existing non-granular indices created that are
yet to be healed, if granular-entry-heal option is toggled from 'off' to
'on', AFR self-heal whenever it kicks in, will try to look for granular
indices in 'entry-changes'. Because of the absence of name indices,
granular entry healing logic will fail to heal these directories, and
worse yet unset pending extended attributes with the assumption that
are no entries that need heal.

To get around this, a new CLI is introduced which will invoke glfsheal
program to figure whether at the time an attempt is made to enable
granular entry heal, there are pending heals on the volume OR there
are one or more bricks that are down. If either of them is true, the
command will be failed with the appropriate error.

New CLI: gluster volume heal <VOL> granular-entry-heal {enable,disable}

Change-Id: I342e0390f847fcb015a50ef58aedfcbcb58f4ed3
BUG: 1398501
Signed-off-by: Krutika Dhananjay <kdhananj@redhat.com>
Reviewed-on: http://review.gluster.org/15942
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
Smoke: Gluster Build System <jenkins@build.gluster.org>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
Reviewed-by: Pranith Kumar Karampuri <pkarampu@redhat.com>

3 files changed, 40 insertions, 12 deletions

diff --git a/cli/src/cli-cmd-parser.c b/cli/src/cli-cmd-parser.c
index e0eb8cff413..8a446595e79 100644
--- a/cli/src/cli-cmd-parser.c
+++ b/cli/src/cli-cmd-parser.c
@@ -3611,7 +3611,8 @@ cli_cmd_volume_heal_options_parse (const char **words, int wordcount,
 
         if (wordcount == 5) {
                 if (strcmp (words[3], "info") &&
-                    strcmp (words[3], "statistics")) {
+                    strcmp (words[3], "statistics") &&
+                    strcmp (words[3], "granular-entry-heal")) {
                         ret = -1;
                         goto out;
                 }
@@ -3641,6 +3642,19 @@ cli_cmd_volume_heal_options_parse (const char **words, int wordcount,
                                 goto done;
                         }
                 }
+
+                if (!strcmp (words[3], "granular-entry-heal")) {
+                        if (!strcmp (words[4], "enable")) {
+                                ret = dict_set_int32 (dict, "heal-op",
+                                          GF_SHD_OP_GRANULAR_ENTRY_HEAL_ENABLE);
+                                goto done;
+                        } else if (!strcmp (words[4], "disable")) {
+                                ret = dict_set_int32 (dict, "heal-op",
+                                         GF_SHD_OP_GRANULAR_ENTRY_HEAL_DISABLE);
+                                goto done;
+                        }
+                }
+
                 ret = -1;
                 goto out;
         }
diff --git a/cli/src/cli-cmd-volume.c b/cli/src/cli-cmd-volume.c
index c721171f517..0d25279f381 100644
--- a/cli/src/cli-cmd-volume.c
+++ b/cli/src/cli-cmd-volume.c
@@ -2151,7 +2151,8 @@ cli_print_brick_status (cli_volume_status_t *status)
                              (op == GF_SHD_OP_SBRAIN_HEAL_FROM_LATEST_MTIME) ||\
                              (op == GF_SHD_OP_SBRAIN_HEAL_FROM_BRICK) ||      \
                              (op == GF_SHD_OP_INDEX_SUMMARY) ||               \
-                             (op == GF_SHD_OP_SPLIT_BRAIN_FILES))
+                             (op == GF_SHD_OP_SPLIT_BRAIN_FILES) ||           \
+                             (op == GF_SHD_OP_GRANULAR_ENTRY_HEAL_ENABLE))
 
 int
 cli_launch_glfs_heal (int heal_op, dict_t *options)
@@ -2200,6 +2201,10 @@ cli_launch_glfs_heal (int heal_op, dict_t *options)
                         runner_add_args (&runner, "xml", NULL);
                 }
                 break;
+        case GF_SHD_OP_GRANULAR_ENTRY_HEAL_ENABLE:
+        case GF_SHD_OP_GRANULAR_ENTRY_HEAL_DISABLE:
+                runner_add_args (&runner, "granular-entry-heal-op", NULL);
+                break;
         default:
                 ret = -1;
         }
@@ -2211,11 +2216,11 @@ cli_launch_glfs_heal (int heal_op, dict_t *options)
                 printf ("%s", out);
         }
         ret = runner_end (&runner);
-        ret = WEXITSTATUS (ret);
 
 out:
         return ret;
 }
+
 int
 cli_cmd_volume_heal_cbk (struct cli_state *state, struct cli_cmd_word *word,
                           const char **words, int wordcount)
@@ -2252,19 +2257,19 @@ cli_cmd_volume_heal_cbk (struct cli_state *state, struct cli_cmd_word *word,
                 goto out;
         if (NEEDS_GLFS_HEAL (heal_op)) {
                 ret = cli_launch_glfs_heal (heal_op, options);
-                if (ret == -1)
+                if (ret < 0)
+                        goto out;
+                if (heal_op != GF_SHD_OP_GRANULAR_ENTRY_HEAL_ENABLE)
                         goto out;
         }
-        else {
-                proc = &cli_rpc_prog->proctable[GLUSTER_CLI_HEAL_VOLUME];
 
-                CLI_LOCAL_INIT (local, words, frame, options);
+        proc = &cli_rpc_prog->proctable[GLUSTER_CLI_HEAL_VOLUME];
 
-                if (proc->fn) {
-                        ret = proc->fn (frame, THIS, options);
-                }
-        }
+        CLI_LOCAL_INIT (local, words, frame, options);
 
+        if (proc->fn) {
+                ret = proc->fn (frame, THIS, options);
+        }
 out:
         if (ret) {
                 cli_cmd_sent_status_get (&sent);
@@ -2673,7 +2678,8 @@ struct cli_cmd volume_cmds[] = {
           "statistics [heal-count [replica <HOSTNAME:BRICKNAME>]] |"
           "info [healed | heal-failed | split-brain] |"
           "split-brain {bigger-file <FILE> | latest-mtime <FILE> |"
-                       "source-brick <HOSTNAME:BRICKNAME> [<FILE>]}]",
+                       "source-brick <HOSTNAME:BRICKNAME> [<FILE>]} |"
+          "granular-entry-heal {enable | disable}]",
           cli_cmd_volume_heal_cbk,
           "self-heal commands on volume specified by <VOLNAME>"},
 
diff --git a/cli/src/cli-rpc-ops.c b/cli/src/cli-rpc-ops.c
index d88ddd7f136..602d3ff1611 100644
--- a/cli/src/cli-rpc-ops.c
+++ b/cli/src/cli-rpc-ops.c
@@ -8670,6 +8670,14 @@ gf_cli_heal_volume_cbk (struct rpc_req *req, struct iovec *iov,
                 operation   = "";
                 heal_op_str = "Disable heal";
                 break;
+        case    GF_SHD_OP_GRANULAR_ENTRY_HEAL_ENABLE:
+                operation   = "";
+                heal_op_str = "Enable granular entry heal";
+                break;
+        case    GF_SHD_OP_GRANULAR_ENTRY_HEAL_DISABLE:
+                operation   = "";
+                heal_op_str = "Disable granular entry heal";
+                break;
         }
 
         if (rsp.op_ret) {