glfsheal: add a '--nolog' flag

....and if set, change the log level to GF_LOG_NONE. This is useful for
monitoring applications which invoke the heal info set of commands once
every minute, leading to un-necessary glfsheal* logs in
/var/log/glusterfs/. For example, we can now run

`gluster volume heal <VOLNAME> info --nolog`
`gluster volume heal <VOLNAME> info split-brain --nolog` etc.

The default log level is still retained at GF_LOG_INFO.

The patch also changes glfsheal internally to accept '--xml' instead of 'xml'.
Note: The --nolog flag is *not* displayed in the help anywhere, for the
sake of consistency in how the other flags are not displayed anywhere in
the help.

fixes: bz#1643519
Change-Id: Ia08b6aa6e4a0548379db7e313dd4411ebc66f206
Signed-off-by: Ravishankar N <ravishankar@redhat.com>

1 files changed, 45 insertions, 14 deletions

diff --git a/heal/src/glfs-heal.c b/heal/src/glfs-heal.c
index f0576f9d76e..0ce9defc83a 100644
--- a/heal/src/glfs-heal.c
+++ b/heal/src/glfs-heal.c
@@ -40,6 +40,9 @@ xmlDocPtr glfsh_doc = NULL;
             ret = 0;                                                           \
     } while (0)
 
+#define MODE_XML (1 << 0)
+#define MODE_NO_LOG (1 << 1)
+
 typedef struct num_entries {
     uint64_t num_entries;
     uint64_t pending_entries;
@@ -1508,6 +1511,28 @@ glfsh_info_t glfsh_xml_output = {
     .end = glfsh_xml_end};
 #endif
 
+static void
+parse_flags(int *argc, char **argv, int *flags)
+{
+    int i = 0;
+    char *opt = NULL;
+    int count = 0;
+
+    for (i = 0; i < *argc; i++) {
+        opt = strtail(argv[i], "--");
+        if (!opt)
+            continue;
+        if (strcmp(opt, "nolog") == 0) {
+            *flags |= MODE_NO_LOG;
+            count++;
+        } else if (strcmp(opt, "xml") == 0) {
+            *flags |= MODE_XML;
+            count++;
+        }
+    }
+    *argc = *argc - count;
+}
+
 int
 main(int argc, char **argv)
 {
@@ -1523,6 +1548,8 @@ main(int argc, char **argv)
     char *op_errstr = NULL;
     char *socket_filepath = NULL;
     gf_xl_afr_op_t heal_op = -1;
+    gf_loglevel_t log_level = GF_LOG_INFO;
+    int flags = 0;
 
     if (argc < 2) {
         printf(USAGE_STR, argv[0]);
@@ -1535,6 +1562,13 @@ main(int argc, char **argv)
         }
     }
     volname = argv[1];
+
+    parse_flags(&argc, argv, &flags);
+    if (flags & MODE_NO_LOG)
+        log_level = GF_LOG_NONE;
+    if (flags & MODE_XML)
+        is_xml = 1;
+
     switch (argc) {
         case 2:
             heal_op = GF_SHD_OP_INDEX_SUMMARY;
@@ -1542,9 +1576,6 @@ main(int argc, char **argv)
         case 3:
             if (!strcmp(argv[2], "split-brain-info")) {
                 heal_op = GF_SHD_OP_SPLIT_BRAIN_FILES;
-            } else if (!strcmp(argv[2], "xml")) {
-                heal_op = GF_SHD_OP_INDEX_SUMMARY;
-                is_xml = 1;
             } else if (!strcmp(argv[2], "granular-entry-heal-op")) {
                 heal_op = GF_SHD_OP_GRANULAR_ENTRY_HEAL_ENABLE;
             } else if (!strcmp(argv[2], "info-summary")) {
@@ -1556,15 +1587,7 @@ main(int argc, char **argv)
             }
             break;
         case 4:
-            if ((!strcmp(argv[2], "split-brain-info")) &&
-                (!strcmp(argv[3], "xml"))) {
-                heal_op = GF_SHD_OP_SPLIT_BRAIN_FILES;
-                is_xml = 1;
-            } else if ((!strcmp(argv[2], "info-summary")) &&
-                       (!strcmp(argv[3], "xml"))) {
-                heal_op = GF_SHD_OP_HEAL_SUMMARY;
-                is_xml = 1;
-            } else if (!strcmp(argv[2], "bigger-file")) {
+            if (!strcmp(argv[2], "bigger-file")) {
                 heal_op = GF_SHD_OP_SBRAIN_HEAL_FROM_BIGGER_FILE;
                 file = argv[3];
             } else if (!strcmp(argv[2], "latest-mtime")) {
@@ -1601,7 +1624,15 @@ main(int argc, char **argv)
     glfsh_output = &glfsh_human_readable;
     if (is_xml) {
 #if (HAVE_LIB_XML)
-        glfsh_output = &glfsh_xml_output;
+        if ((heal_op == GF_SHD_OP_INDEX_SUMMARY) ||
+            (heal_op == GF_SHD_OP_SPLIT_BRAIN_FILES) ||
+            (heal_op == GF_SHD_OP_HEAL_SUMMARY)) {
+            glfsh_output = &glfsh_xml_output;
+        } else {
+            printf(USAGE_STR, argv[0]);
+            ret = -1;
+            goto out;
+        }
 #else
         /*No point doing anything, just fail the command*/
         exit(EXIT_FAILURE);
@@ -1647,7 +1678,7 @@ main(int argc, char **argv)
     }
     snprintf(logfilepath, sizeof(logfilepath),
              DEFAULT_HEAL_LOG_FILE_DIRECTORY "/glfsheal-%s.log", volname);
-    ret = glfs_set_logging(fs, logfilepath, GF_LOG_INFO);
+    ret = glfs_set_logging(fs, logfilepath, log_level);
     if (ret < 0) {
         ret = -errno;
         gf_asprintf(&op_errstr,