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From b1a4947e382c5e2ba1137ed606ecffc69fcf00e9 Mon Sep 17 00:00:00 2001
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From: Mohit Agrawal <moagrawa@redhat.com>
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Date: Tue, 25 Jun 2019 17:30:17 +0530
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Subject: [PATCH 205/221] glusterd: Can't run rebalance due to long unix socket
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Problem: glusterd populate unix socket file name based
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         on volname and if volname is lengthy socket
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         system call's are failed due to breach maximum length
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         is defined in the kernel.
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Solution:Convert unix socket name to hash to resolve the issue
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> Change-Id: I5072e8184013095587537dbfa4767286307fff65
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> fixes: bz#1720566
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> (Cherry pick from commit 2d7b77eb971700c1073db2b74f5877c1ae8293fc)
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> (Reviewed on upstream link https://review.gluster.org/#/c/glusterfs/+/22869/)
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BUG: 1720192
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Change-Id: I5072e8184013095587537dbfa4767286307fff65
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Signed-off-by: Mohit Agrawal <moagrawa@redhat.com>
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Reviewed-on: https://code.engineering.redhat.com/gerrit/174557
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Tested-by: RHGS Build Bot <nigelb@redhat.com>
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Reviewed-by: Atin Mukherjee <amukherj@redhat.com>
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---
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 tests/bugs/glusterd/bug-1720566.t              | 50 ++++++++++++++++++++++++++
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 xlators/mgmt/glusterd/src/glusterd-rebalance.c | 38 +-------------------
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 xlators/mgmt/glusterd/src/glusterd.h           | 23 +++++-------
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 3 files changed, 59 insertions(+), 52 deletions(-)
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 create mode 100644 tests/bugs/glusterd/bug-1720566.t
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diff --git a/tests/bugs/glusterd/bug-1720566.t b/tests/bugs/glusterd/bug-1720566.t
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new file mode 100644
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index 0000000..99bcf6f
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--- /dev/null
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+++ b/tests/bugs/glusterd/bug-1720566.t
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@@ -0,0 +1,50 @@
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+#!/bin/bash
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+
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+. $(dirname $0)/../../include.rc
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+. $(dirname $0)/../../cluster.rc
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+. $(dirname $0)/../../volume.rc
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+
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+
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+cleanup;
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+V0="TestLongVolnamec363b7b536700ff06eedeae0dd9037fec363b7b536700ff06eedeae0dd9037fec363b7b536700ff06eedeae0dd9abcd"
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+V1="TestLongVolname3102bd28a16c49440bd5210e4ec4d5d93102bd28a16c49440bd5210e4ec4d5d933102bd28a16c49440bd5210e4ebbcd"
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+TEST launch_cluster 2;
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+TEST $CLI_1 peer probe $H2;
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+
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+EXPECT_WITHIN $PROBE_TIMEOUT 1 peer_count
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+
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+$CLI_1 volume create $V0 $H1:$B1/$V0  $H2:$B2/$V0
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+EXPECT 'Created' cluster_volinfo_field 1 $V0 'Status';
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+$CLI_1 volume create $V1 $H1:$B1/$V1  $H2:$B2/$V1
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+EXPECT 'Created' cluster_volinfo_field 1 $V1 'Status';
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+
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+$CLI_1 volume start $V0
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+EXPECT 'Started' cluster_volinfo_field 1 $V0 'Status';
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+
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+$CLI_1 volume start $V1
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+EXPECT 'Started' cluster_volinfo_field 1 $V1 'Status';
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+
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+#Mount FUSE
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+TEST glusterfs -s $H1 --volfile-id=$V0 $M0;
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+
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+
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+#Mount FUSE
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+TEST glusterfs -s $H1 --volfile-id=$V1 $M1;
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+
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+TEST mkdir $M0/dir{1..4};
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+TEST touch $M0/dir{1..4}/files{1..4};
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+
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+TEST mkdir $M1/dir{1..4};
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+TEST touch $M1/dir{1..4}/files{1..4};
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+
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+TEST $CLI_1 volume add-brick $V0 $H1:$B1/${V0}_1 $H2:$B2/${V0}_1
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+TEST $CLI_1 volume add-brick $V1 $H1:$B1/${V1}_1 $H2:$B2/${V1}_1
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+
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+
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+TEST $CLI_1 volume rebalance $V0 start
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+TEST $CLI_1 volume rebalance $V1  start
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+
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+EXPECT_WITHIN $REBALANCE_TIMEOUT "completed" cluster_rebalance_status_field 1 $V0
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+EXPECT_WITHIN $REBALANCE_TIMEOUT "completed" cluster_rebalance_status_field 1  $V1
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+
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+cleanup;
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diff --git a/xlators/mgmt/glusterd/src/glusterd-rebalance.c b/xlators/mgmt/glusterd/src/glusterd-rebalance.c
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index cbed9a9..b419a89 100644
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--- a/xlators/mgmt/glusterd/src/glusterd-rebalance.c
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+++ b/xlators/mgmt/glusterd/src/glusterd-rebalance.c
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@@ -266,18 +266,7 @@ glusterd_handle_defrag_start(glusterd_volinfo_t *volinfo, char *op_errstr,
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     if (dict_get_strn(this->options, "transport.socket.bind-address",
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                       SLEN("transport.socket.bind-address"),
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-                      &volfileserver) == 0) {
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-        /*In the case of running multiple glusterds on a single machine,
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-         *we should ensure that log file and unix socket file should be
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-         *unique in given cluster */
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-
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-        GLUSTERD_GET_DEFRAG_SOCK_FILE_OLD(sockfile, volinfo, priv);
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-        snprintf(logfile, PATH_MAX, "%s/%s-%s-%s.log",
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-                 DEFAULT_LOG_FILE_DIRECTORY, volinfo->volname,
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-                 (cmd == GF_DEFRAG_CMD_START_TIER ? "tier" : "rebalance"),
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-                 uuid_utoa(MY_UUID));
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-
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-    } else {
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+                      &volfileserver) != 0) {
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         volfileserver = "localhost";
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     }
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@@ -378,9 +367,6 @@ glusterd_rebalance_rpc_create(glusterd_volinfo_t *volinfo)
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     glusterd_defrag_info_t *defrag = volinfo->rebal.defrag;
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     glusterd_conf_t *priv = NULL;
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     xlator_t *this = NULL;
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-    struct stat buf = {
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-        0,
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-    };
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     this = THIS;
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     GF_ASSERT(this);
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@@ -396,28 +382,6 @@ glusterd_rebalance_rpc_create(glusterd_volinfo_t *volinfo)
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         goto out;
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     GLUSTERD_GET_DEFRAG_SOCK_FILE(sockfile, volinfo);
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-    /* Check if defrag sockfile exists in the new location
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-     * in /var/run/ , if it does not try the old location
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-     */
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-    ret = sys_stat(sockfile, &buf;;
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-    /* TODO: Remove this once we don't need backward compatibility
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-     * with the older path
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-     */
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-    if (ret && (errno == ENOENT)) {
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-        gf_msg(this->name, GF_LOG_WARNING, errno, GD_MSG_FILE_OP_FAILED,
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-               "Rebalance sockfile "
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-               "%s does not exist. Trying old path.",
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-               sockfile);
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-        GLUSTERD_GET_DEFRAG_SOCK_FILE_OLD(sockfile, volinfo, priv);
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-        ret = sys_stat(sockfile, &buf;;
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-        if (ret && (ENOENT == errno)) {
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-            gf_msg(this->name, GF_LOG_ERROR, 0, GD_MSG_REBAL_NO_SOCK_FILE,
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-                   "Rebalance "
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-                   "sockfile %s does not exist",
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-                   sockfile);
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-            goto out;
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-        }
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-    }
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     /* Setting frame-timeout to 10mins (600seconds).
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      * Unix domain sockets ensures that the connection is reliable. The
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diff --git a/xlators/mgmt/glusterd/src/glusterd.h b/xlators/mgmt/glusterd/src/glusterd.h
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index f96bca3..7d07d33 100644
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--- a/xlators/mgmt/glusterd/src/glusterd.h
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+++ b/xlators/mgmt/glusterd/src/glusterd.h
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@@ -910,30 +910,23 @@ typedef ssize_t (*gd_serialize_t)(struct iovec outmsg, void *args);
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         }                                                                      \
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     } while (0)
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-#define GLUSTERD_GET_DEFRAG_SOCK_FILE_OLD(path, volinfo, priv)                 \
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-    do {                                                                       \
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-        char defrag_path[PATH_MAX];                                            \
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-        int32_t _sockfile_old_len;                                             \
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-        GLUSTERD_GET_DEFRAG_DIR(defrag_path, volinfo, priv);                   \
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-        _sockfile_old_len = snprintf(path, PATH_MAX, "%s/%s.sock",             \
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-                                     defrag_path, uuid_utoa(MY_UUID));         \
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-        if ((_sockfile_old_len < 0) || (_sockfile_old_len >= PATH_MAX)) {      \
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-            path[0] = 0;                                                       \
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-        }                                                                      \
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-    } while (0)
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-
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 #define GLUSTERD_GET_DEFRAG_SOCK_FILE(path, volinfo)                           \
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     do {                                                                       \
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         char operation[NAME_MAX];                                              \
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+        char tmppath[PATH_MAX] = {                                             \
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+            0,                                                                 \
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+        };                                                                     \
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         int32_t _defrag_sockfile_len;                                          \
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         GLUSTERD_GET_DEFRAG_PROCESS(operation, volinfo);                       \
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         _defrag_sockfile_len = snprintf(                                       \
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-            path, UNIX_PATH_MAX,                                               \
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-            DEFAULT_VAR_RUN_DIRECTORY "/gluster-%s-%s.sock", operation,        \
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-            uuid_utoa(volinfo->volume_id));                                    \
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+            tmppath, PATH_MAX,                                                 \
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+            DEFAULT_VAR_RUN_DIRECTORY "/gluster-%s-%s-%s.sock", operation,     \
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+            volinfo->volname, uuid_utoa(MY_UUID));                             \
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         if ((_defrag_sockfile_len < 0) ||                                      \
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             (_defrag_sockfile_len >= PATH_MAX)) {                              \
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             path[0] = 0;                                                       \
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+        } else {                                                               \
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+            glusterd_set_socket_filepath(tmppath, path, sizeof(path));         \
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         }                                                                      \
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     } while (0)
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-- 
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1.8.3.1
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