mgmt/glusterd: volume reset force implementation

Signed-off-by: Pranith Kumar K <pranithk@gluster.com>
Signed-off-by: Anand Avati <avati@gluster.com>

BUG: 2729 (Implement force option for volume reset)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=2729

4 files changed, 144 insertions, 89 deletions

diff --git a/xlators/mgmt/glusterd/src/glusterd-op-sm.c b/xlators/mgmt/glusterd/src/glusterd-op-sm.c
index 8d1cd639f3d..b9d63605ab9 100644
--- a/xlators/mgmt/glusterd/src/glusterd-op-sm.c
+++ b/xlators/mgmt/glusterd/src/glusterd-op-sm.c
@@ -3519,21 +3519,30 @@ out:
 void
 _delete_reconfig_opt (dict_t *this, char *key, data_t *value, void *data)
 {
+        int             exists = 0;
+        int32_t         is_force = 0;
 
-        int            exists = 0;
-
+        GF_ASSERT (data);
+        is_force = *((int32_t*)data);
         exists = glusterd_check_option_exists(key, NULL);
 
-        if (exists == 1) {
-                gf_log ("", GF_LOG_DEBUG, "deleting dict with key=%s,value=%s",
-                        key, value->data);
-                dict_del (this, key);
-        }
+        if (exists != 1)
+                goto out;
+
+        if ((!is_force) &&
+            (_gf_true == glusterd_check_voloption_flags (key,
+                                                         OPT_FLAG_FORCE)))
+                goto out;
 
+        gf_log ("", GF_LOG_DEBUG, "deleting dict with key=%s,value=%s",
+                key, value->data);
+        dict_del (this, key);
+out:
+        return;
 }
 
 int
-glusterd_options_reset (glusterd_volinfo_t *volinfo)
+glusterd_options_reset (glusterd_volinfo_t *volinfo, int32_t is_force)
 {
         int                      ret = 0;
 
@@ -3541,7 +3550,7 @@ glusterd_options_reset (glusterd_volinfo_t *volinfo)
 
         GF_ASSERT (volinfo->dict);
 
-        dict_foreach (volinfo->dict, _delete_reconfig_opt, volinfo->dict);
+        dict_foreach (volinfo->dict, _delete_reconfig_opt, &is_force);
 
         ret = glusterd_create_volfiles_and_notify_services (volinfo);
 
@@ -3575,6 +3584,7 @@ glusterd_op_reset_volume (dict_t *dict)
         glusterd_volinfo_t     *volinfo    = NULL;
         int                     ret        = -1;
         char                   *volname    = NULL;
+        int32_t                is_force    = 0;
 
         ret = dict_get_str (dict, "volname", &volname);
         if (ret) {
@@ -3582,13 +3592,17 @@ glusterd_op_reset_volume (dict_t *dict)
                 goto out;
         }
 
+        ret = dict_get_int32 (dict, "force", &is_force);
+        if (ret)
+                is_force = 0;
+
         ret = glusterd_volinfo_find (volname, &volinfo);
         if (ret) {
                 gf_log ("", GF_LOG_ERROR, "Unable to allocate memory");
                 goto out;
         }
 
-        ret = glusterd_options_reset (volinfo);
+        ret = glusterd_options_reset (volinfo, is_force);
 
 out:
         gf_log ("", GF_LOG_DEBUG, "'volume reset' returning %d", ret);
diff --git a/xlators/mgmt/glusterd/src/glusterd-op-sm.h b/xlators/mgmt/glusterd/src/glusterd-op-sm.h
index 5e1106bc1e2..9c322b0bffd 100644
--- a/xlators/mgmt/glusterd/src/glusterd-op-sm.h
+++ b/xlators/mgmt/glusterd/src/glusterd-op-sm.h
@@ -251,7 +251,7 @@ glusterd_check_brick_rb_part (char *bricks, int count, glusterd_volinfo_t *volin
 void
 glusterd_do_replace_brick (void *data);
 int
-glusterd_options_reset (glusterd_volinfo_t *volinfo);
+glusterd_options_reset (glusterd_volinfo_t *volinfo, int32_t is_force);
 
 char*
 glusterd_op_sm_state_name_get (int state);
diff --git a/xlators/mgmt/glusterd/src/glusterd-volgen.c b/xlators/mgmt/glusterd/src/glusterd-volgen.c
index 0d05ec5b52a..816e9e68b69 100644
--- a/xlators/mgmt/glusterd/src/glusterd-volgen.c
+++ b/xlators/mgmt/glusterd/src/glusterd-volgen.c
@@ -84,91 +84,92 @@ struct volopt_map_entry {
         char *option;
         char *value;
         option_type_t type;
+        uint32_t flags;
 };
 
 static struct volopt_map_entry glusterd_volopt_map[] = {
 
-        {"cluster.lookup-unhashed",              "cluster/distribute", NULL, NULL, NO_DOC       }, /* NODOC */
-        {"cluster.min-free-disk",                "cluster/distribute", NULL, NULL, NO_DOC       }, /* NODOC */
-
-        {"cluster.entry-change-log",             "cluster/replicate",  NULL, NULL, NO_DOC        }, /* NODOC */
-        {"cluster.read-subvolume",               "cluster/replicate",  NULL, NULL, NO_DOC       }, /* NODOC */
-        {"cluster.background-self-heal-count",   "cluster/replicate",  NULL, NULL, NO_DOC       }, /* NODOC */
-        {"cluster.metadata-self-heal",           "cluster/replicate",  NULL, NULL, NO_DOC        }, /* NODOC */
-        {"cluster.data-self-heal",               "cluster/replicate",  NULL, NULL, NO_DOC        }, /* NODOC */
-        {"cluster.entry-self-heal",              "cluster/replicate",  NULL, NULL, NO_DOC        }, /* NODOC */
-        {"cluster.strict-readdir",               "cluster/replicate",  NULL, NULL, NO_DOC        }, /* NODOC */
-        {"cluster.self-heal-window-size",        "cluster/replicate",         "data-self-heal-window-size", NULL, DOC},
-        {"cluster.data-change-log",              "cluster/replicate",  NULL, NULL, NO_DOC        }, /* NODOC */
-        {"cluster.metadata-change-log",          "cluster/replicate",  NULL, NULL, NO_DOC        }, /* NODOC */
-        {"cluster.data-self-heal-algorithm",     "cluster/replicate",         "data-self-heal-algorithm", NULL,DOC},
-
-        {"cluster.stripe-block-size",            "cluster/stripe",            "block-size", NULL, DOC},
-
-        {"diagnostics.latency-measurement",      "debug/io-stats",     NULL, NULL, NO_DOC         },
-        {"diagnostics.dump-fd-stats",            "debug/io-stats",     NULL, NULL, NO_DOC        },
-        {"diagnostics.count-fop-hits",            "debug/io-stats",     NULL, NULL, NO_DOC        },
-        {"diagnostics.brick-log-level",          "debug/io-stats",            "!log-level", NULL, DOC},
-        {"diagnostics.client-log-level",         "debug/io-stats",            "!log-level", NULL, DOC},
-
-        {"performance.cache-max-file-size",      "performance/io-cache",      "max-file-size", NULL, DOC},
-        {"performance.cache-min-file-size",      "performance/io-cache",      "min-file-size", NULL, DOC},
-        {"performance.cache-refresh-timeout",    "performance/io-cache",      "cache-timeout", NULL, DOC},
-        {"performance.cache-priority",           "performance/io-cache",      "priority", NULL, DOC}, /* NODOC */
-        {"performance.cache-size",               "performance/io-cache",   NULL, NULL, NO_DOC    },
-        {"performance.cache-size",               "performance/quick-read", NULL, NULL, NO_DOC    },
-        {"performance.flush-behind",             "performance/write-behind",      "flush-behind", NULL, DOC},
-
-        {"performance.io-thread-count",          "performance/io-threads",    "thread-count", DOC},
-
-        {"performance.disk-usage-limit",         "performance/quota",   NULL, NULL, NO_DOC       }, /* NODOC */
-        {"performance.min-free-disk-limit",      "performance/quota",   NULL, NULL, NO_DOC       }, /* NODOC */
+        {"cluster.lookup-unhashed",              "cluster/distribute", NULL, NULL, NO_DOC, 0    },
+        {"cluster.min-free-disk",                "cluster/distribute", NULL, NULL, NO_DOC, 0    },
+
+        {"cluster.entry-change-log",             "cluster/replicate",  NULL, NULL, NO_DOC, 0     },
+        {"cluster.read-subvolume",               "cluster/replicate",  NULL, NULL, NO_DOC, 0    },
+        {"cluster.background-self-heal-count",   "cluster/replicate",  NULL, NULL, NO_DOC, 0    },
+        {"cluster.metadata-self-heal",           "cluster/replicate",  NULL, NULL, NO_DOC, 0     },
+        {"cluster.data-self-heal",               "cluster/replicate",  NULL, NULL, NO_DOC, 0     },
+        {"cluster.entry-self-heal",              "cluster/replicate",  NULL, NULL, NO_DOC, 0     },
+        {"cluster.strict-readdir",               "cluster/replicate",  NULL, NULL, NO_DOC, 0     },
+        {"cluster.self-heal-window-size",        "cluster/replicate",         "data-self-heal-window-size", NULL, DOC, 0},
+        {"cluster.data-change-log",              "cluster/replicate",  NULL, NULL, NO_DOC, 0     },
+        {"cluster.metadata-change-log",          "cluster/replicate",  NULL, NULL, NO_DOC, 0     },
+        {"cluster.data-self-heal-algorithm",     "cluster/replicate",         "data-self-heal-algorithm", NULL,DOC, 0},
+
+        {"cluster.stripe-block-size",            "cluster/stripe",            "block-size", NULL, DOC, 0},
+
+        {"diagnostics.latency-measurement",      "debug/io-stats",     NULL, NULL, NO_DOC, 0      },
+        {"diagnostics.dump-fd-stats",            "debug/io-stats",     NULL, NULL, NO_DOC, 0     },
+        {"diagnostics.count-fop-hits",           "debug/io-stats",     NULL, NULL, NO_DOC, 0     },
+        {"diagnostics.brick-log-level",          "debug/io-stats",            "!log-level", NULL, DOC, 0},
+        {"diagnostics.client-log-level",         "debug/io-stats",            "!log-level", NULL, DOC, 0},
+
+        {"performance.cache-max-file-size",      "performance/io-cache",      "max-file-size", NULL, DOC, 0},
+        {"performance.cache-min-file-size",      "performance/io-cache",      "min-file-size", NULL, DOC, 0},
+        {"performance.cache-refresh-timeout",    "performance/io-cache",      "cache-timeout", NULL, DOC, 0},
+        {"performance.cache-priority",           "performance/io-cache",      "priority", NULL, DOC, 0},
+        {"performance.cache-size",               "performance/io-cache",   NULL, NULL, NO_DOC, 0 },
+        {"performance.cache-size",               "performance/quick-read", NULL, NULL, NO_DOC, 0 },
+        {"performance.flush-behind",             "performance/write-behind",      "flush-behind", NULL, DOC, 0},
+
+        {"performance.io-thread-count",          "performance/io-threads",    "thread-count", DOC, 0},
+
+        {"performance.disk-usage-limit",         "performance/quota",   NULL, NULL, NO_DOC, 0    },
+        {"performance.min-free-disk-limit",      "performance/quota",   NULL, NULL, NO_DOC, 0    },
 
         {"performance.write-behind-window-size", "performance/write-behind",  "cache-size", NULL, DOC},
 
-        {"network.frame-timeout",                "protocol/client",    NULL, NULL, NO_DOC        },
-        {"network.ping-timeout",                 "protocol/client",    NULL, NULL, NO_DOC        },
-        {"network.inode-lru-limit",              "protocol/server",    NULL, NULL, NO_DOC        }, /* NODOC */
-
-        {"auth.allow",                           "protocol/server",           "!server-auth", "*", DOC},
-        {"auth.reject",                          "protocol/server",           "!server-auth", NULL, DOC},
-
-        {"transport.keepalive",                   "protocol/server",           "transport.socket.keepalive", NULL, NO_DOC},
-        {"server.allow-insecure",                 "protocol/server",          "rpc-auth-allow-insecure", NULL, NO_DOC},
-
-        {"performance.write-behind",             "performance/write-behind",  "!perf", "on", NO_DOC}, /* NODOC */
-        {"performance.read-ahead",               "performance/read-ahead",    "!perf", "on", NO_DOC}, /* NODOC */
-        {"performance.io-cache",                 "performance/io-cache",      "!perf", "on", NO_DOC}, /* NODOC */
-        {"performance.quick-read",               "performance/quick-read",    "!perf", "on", NO_DOC}, /* NODOC */
-        {"performance.stat-prefetch",            "performance/stat-prefetch", "!perf", "on", NO_DOC},      /* NODOC */
-
-        {"features.marker-gsync",                "features/marker",           "gsync", "off", NO_DOC},
-
-        {"nfs.enable-ino32",                     "nfs/server",                "nfs.enable-ino32", NULL, GLOBAL_DOC},
-        {"nfs.mem-factor",                       "nfs/server",                "nfs.mem-factor", NULL, GLOBAL_DOC},
-        {"nfs.export-dirs",                      "nfs/server",                "nfs3.export-dirs", NULL, GLOBAL_DOC},
-        {"nfs.export-volumes",                   "nfs/server",                "nfs3.export-volumes", NULL, GLOBAL_DOC},
-        {"nfs.addr-namelookup",                  "nfs/server",                "rpc-auth.addr.namelookup", NULL, GLOBAL_DOC},
-        {"nfs.dynamic-volumes",                  "nfs/server",                "nfs.dynamic-volumes", NULL, GLOBAL_DOC},
-        {"nfs.register-with-portmap",            "nfs/server",                "rpc.register-with-portmap", NULL, GLOBAL_DOC},
-        {"nfs.port",                             "nfs/server",                "nfs.port", NULL, GLOBAL_DOC},
-
-        {"nfs.rpc-auth-unix",                    "nfs/server",                "!nfs.rpc-auth-auth-unix", NULL, DOC},
-        {"nfs.rpc-auth-null",                    "nfs/server",                "!nfs.rpc-auth-auth-null", NULL, DOC},
-        {"nfs.rpc-auth-allow",                   "nfs/server",                "!nfs.rpc-auth.addr.allow", NULL, DOC},
-        {"nfs.rpc-auth-reject",                  "nfs/server",                "!nfs.rpc-auth.addr.reject", NULL, DOC},
-        {"nfs.ports-insecure",                   "nfs/server",                "!nfs.auth.ports.insecure", NULL, DOC},
-
-        {"nfs.trusted-sync",                     "nfs/server",                "!nfs-trusted-sync", NULL, DOC},
-        {"nfs.trusted-write",                    "nfs/server",                "!nfs-trusted-write", NULL, DOC},
-        {"nfs.volume-access",                    "nfs/server",                "!nfs-volume-access", NULL, DOC},
-        {"nfs.export-dir",                       "nfs/server",                "!nfs-export-dir", NULL, DOC},
-        {"nfs.disable",                          "nfs/server",                "!nfs-disable", NULL, DOC},
-
-        {"features.quota",                       "features/quota",            "quota", "off", NO_DOC},
-        {"features.quota",                       "features/marker",           "quota", "off", NO_DOC},
-        {"features.limit-usage",                 "features/quota",            "limit-set", NULL, NO_DOC},
-        {"features.quota-timeout",               "features/quota",            "timeout", "0", NO_DOC},
+        {"network.frame-timeout",                "protocol/client",    NULL, NULL, NO_DOC, 0     },
+        {"network.ping-timeout",                 "protocol/client",    NULL, NULL, NO_DOC, 0     },
+        {"network.inode-lru-limit",              "protocol/server",    NULL, NULL, NO_DOC, 0     },
+
+        {"auth.allow",                           "protocol/server",           "!server-auth", "*", DOC, 0},
+        {"auth.reject",                          "protocol/server",           "!server-auth", NULL, DOC, 0},
+
+        {"transport.keepalive",                   "protocol/server",           "transport.socket.keepalive", NULL, NO_DOC, 0},
+        {"server.allow-insecure",                 "protocol/server",          "rpc-auth-allow-insecure", NULL, NO_DOC, 0},
+
+        {"performance.write-behind",             "performance/write-behind",  "!perf", "on", NO_DOC, 0},
+        {"performance.read-ahead",               "performance/read-ahead",    "!perf", "on", NO_DOC, 0},
+        {"performance.io-cache",                 "performance/io-cache",      "!perf", "on", NO_DOC, 0},
+        {"performance.quick-read",               "performance/quick-read",    "!perf", "on", NO_DOC, 0},
+        {"performance.stat-prefetch",            "performance/stat-prefetch", "!perf", "on", NO_DOC, 0},
+
+        {"features.marker-gsync",                "features/marker",           "gsync", "off", NO_DOC, OPT_FLAG_FORCE},
+
+        {"nfs.enable-ino32",                     "nfs/server",                "nfs.enable-ino32", NULL, GLOBAL_DOC, 0},
+        {"nfs.mem-factor",                       "nfs/server",                "nfs.mem-factor", NULL, GLOBAL_DOC, 0},
+        {"nfs.export-dirs",                      "nfs/server",                "nfs3.export-dirs", NULL, GLOBAL_DOC, 0},
+        {"nfs.export-volumes",                   "nfs/server",                "nfs3.export-volumes", NULL, GLOBAL_DOC, 0},
+        {"nfs.addr-namelookup",                  "nfs/server",                "rpc-auth.addr.namelookup", NULL, GLOBAL_DOC, 0},
+        {"nfs.dynamic-volumes",                  "nfs/server",                "nfs.dynamic-volumes", NULL, GLOBAL_DOC, 0},
+        {"nfs.register-with-portmap",            "nfs/server",                "rpc.register-with-portmap", NULL, GLOBAL_DOC, 0},
+        {"nfs.port",                             "nfs/server",                "nfs.port", NULL, GLOBAL_DOC, 0},
+
+        {"nfs.rpc-auth-unix",                    "nfs/server",                "!nfs.rpc-auth-auth-unix", NULL, DOC, 0},
+        {"nfs.rpc-auth-null",                    "nfs/server",                "!nfs.rpc-auth-auth-null", NULL, DOC, 0},
+        {"nfs.rpc-auth-allow",                   "nfs/server",                "!nfs.rpc-auth.addr.allow", NULL, DOC, 0},
+        {"nfs.rpc-auth-reject",                  "nfs/server",                "!nfs.rpc-auth.addr.reject", NULL, DOC, 0},
+        {"nfs.ports-insecure",                   "nfs/server",                "!nfs.auth.ports.insecure", NULL, DOC, 0},
+
+        {"nfs.trusted-sync",                     "nfs/server",                "!nfs-trusted-sync", NULL, DOC, 0},
+        {"nfs.trusted-write",                    "nfs/server",                "!nfs-trusted-write", NULL, DOC, 0},
+        {"nfs.volume-access",                    "nfs/server",                "!nfs-volume-access", NULL, DOC, 0},
+        {"nfs.export-dir",                       "nfs/server",                "!nfs-export-dir", NULL, DOC, 0},
+        {"nfs.disable",                          "nfs/server",                "!nfs-disable", NULL, DOC, 0},
+
+        {"features.quota",                       "features/quota",            "quota", "off", NO_DOC, OPT_FLAG_FORCE},
+        {"features.quota",                       "features/marker",           "quota", "off", NO_DOC, OPT_FLAG_FORCE},
+        {"features.limit-usage",                 "features/quota",            "limit-set", NULL, NO_DOC, 0},
+        {"features.quota-timeout",               "features/quota",            "timeout", "0", NO_DOC, 0},
         {NULL,                                                                }
 };
 
@@ -749,6 +750,39 @@ glusterd_volinfo_get (glusterd_volinfo_t *volinfo, char *key, char **value)
 }
 
 gf_boolean_t
+glusterd_check_voloption_flags (char *key, int32_t flags)
+{
+        char *completion = NULL;
+        struct volopt_map_entry *vmep = NULL;
+        int   ret = 0;
+
+        if (!strchr (key, '.')) {
+                ret = option_complete (key, &completion);
+                if (ret) {
+                        gf_log ("", GF_LOG_ERROR, "Out of memory");
+                        return _gf_false;
+                }
+
+                if (!completion) {
+                        gf_log ("", GF_LOG_ERROR, "option %s does not exist",
+                                        key);
+                        return _gf_false;
+                }
+        }
+
+        for (vmep = glusterd_volopt_map; vmep->key; vmep++) {
+                if (strcmp (vmep->key, key) == 0) {
+                        if (vmep->flags & flags)
+                                return _gf_true;
+                        else
+                                return _gf_false;
+                }
+        }
+
+        return _gf_false;
+}
+
+gf_boolean_t
 glusterd_check_globaloption (char *key)
 {
         char *completion = NULL;
diff --git a/xlators/mgmt/glusterd/src/glusterd-volgen.h b/xlators/mgmt/glusterd/src/glusterd-volgen.h
index 26861150147..7028ea7b603 100644
--- a/xlators/mgmt/glusterd/src/glusterd-volgen.h
+++ b/xlators/mgmt/glusterd/src/glusterd-volgen.h
@@ -27,6 +27,10 @@
 
 #include "glusterd.h"
 
+typedef enum gd_volopt_flags_ {
+        OPT_FLAG_NONE,
+        OPT_FLAG_FORCE = 1,
+} gd_volopt_flags_t;
 int glusterd_create_rb_volfiles (glusterd_volinfo_t *volinfo,
                                  glusterd_brickinfo_t *brickinfo);
 
@@ -45,5 +49,8 @@ int glusterd_validate_globalopts (glusterd_volinfo_t *volinfo, dict_t *val_dict,
 
 int glusterd_validate_localopts (dict_t *val_dict, char **op_errstr);
 gf_boolean_t glusterd_check_globaloption (char *key);
+gf_boolean_t
+glusterd_check_voloption_flags (char *key, int32_t flags);
+
 
 #endif