Glusterd: gluster volume set <volume> <option> <value>

Signed-off-by: Kaushik BV <kaushikbv@gluster.com>
Signed-off-by: Vijay Bellur <vijay@dev.gluster.com>

BUG: 1159 ()
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=1159

1 files changed, 159 insertions, 0 deletions

diff --git a/xlators/performance/io-cache/src/io-cache.c b/xlators/performance/io-cache/src/io-cache.c
index 490d31688..296edf233 100644
--- a/xlators/performance/io-cache/src/io-cache.c
+++ b/xlators/performance/io-cache/src/io-cache.c
@@ -1470,6 +1470,165 @@ mem_acct_init (xlator_t *this)
         return ret;
 }
 
+int
+reconfigure (xlator_t *this, dict_t *options)
+{
+	ioc_table_t     *table = NULL;
+	int32_t		 cache_timeout;
+	int64_t		 min_file_size = 0;
+	int64_t		 max_file_size = 0;
+	char		*tmp = NULL;
+	uint64_t         cache_size;
+	char		*cache_size_string = NULL;
+	int		 ret = 0;
+
+	table = this->private;
+
+	ioc_table_lock (table); 
+	{
+		if (dict_get (options, "cache-timeout")) {
+			cache_timeout = 
+				data_to_uint32 (dict_get (options,
+						    	  "cache-timeout"));
+			if (cache_timeout < 0){
+				gf_log (this->name, GF_LOG_WARNING,
+					"cache-timeout %d seconds invalid,"
+					" has to be  >=0", cache_timeout);
+				ret = -1;
+				goto out;
+			}
+		
+
+			if (cache_timeout > 60){
+				gf_log (this->name, GF_LOG_WARNING,
+				"cache-timeout %d seconds invalid,"
+				" has to be  <=60", cache_timeout);
+				ret = -1;
+				goto out;
+			}
+
+			table->cache_timeout = cache_timeout;
+
+			gf_log (this->name, GF_LOG_DEBUG,
+				"Reconfiguring %d seconds to"
+				" revalidate cache", table->cache_timeout);
+		}
+
+
+		if (dict_get (options, "cache-size"))
+			cache_size_string = data_to_str (dict_get (options, 
+							   "cache-size"));
+		if (cache_size_string) {
+			if (gf_string2bytesize (cache_size_string, 
+						&cache_size) != 0) {
+				gf_log ("io-cache", GF_LOG_ERROR, 
+					"invalid number format \"%s\" of "
+					"\"option cache-size\" Defaulting"
+					"to old value", cache_size_string);
+                        	ret = -1;
+				goto out;
+			}
+
+			if (cache_size < (4*(2^20))) {
+	                        gf_log(this->name, GF_LOG_ERROR, "Reconfiguration"
+				      "'option cache-size %s' failed , Max value"
+				      "can be 4MiB, Defaulting to old value (%d)"
+				      , cache_size_string, table->cache_size);
+				ret = -1;
+				goto out;
+       		        }
+
+			if (cache_size > (6 *(2^30))) {
+        	                gf_log(this->name, GF_LOG_ERROR, "Reconfiguration"
+				       "'option cache-size %s' failed , Max value"
+				       "can be 6GiB, Defaulting to old value (%d)"
+			  		, cache_size_string, table->cache_size);
+				ret = -1;
+				goto out;
+                	}
+			
+
+			gf_log (this->name, GF_LOG_DEBUG, "Reconfiguring "
+				" cache-size %"PRIu64"", table->cache_size);
+			table->cache_size = cache_size;
+		}
+
+	
+		if (dict_get (options, "priority")) {
+			char *option_list = data_to_str (dict_get (options, 
+							   "priority"));
+			gf_log (this->name, GF_LOG_TRACE,
+				"option path %s", option_list);
+			/* parse the list of pattern:priority */
+			table->max_pri = ioc_get_priority_list (option_list, 
+								&table->priority_list);
+    
+			if (table->max_pri == -1) {
+        	                ret = -1;
+				goto out;
+                	}
+			table->max_pri ++;
+		}
+	
+		
+	
+		min_file_size = table->min_file_size;
+		tmp = data_to_str (dict_get (options, "min-file-size"));
+	        if (tmp != NULL) {
+			if (gf_string2bytesize (tmp,
+                	                        (uint64_t *)&min_file_size)
+						!= 0) {
+				gf_log ("io-cache", GF_LOG_ERROR, 
+					"invalid number format \"%s\" of "
+					"\"option min-file-size\"", tmp);
+                        	ret = -1;
+				goto out;
+			}
+		
+			gf_log (this->name, GF_LOG_DEBUG, 
+				"Reconfiguring min-file-size %"PRIu64"", 
+				table->min_file_size);
+		}
+
+		max_file_size = table->max_file_size;
+        	tmp = data_to_str (dict_get (options, "max-file-size"));
+       		if (tmp != NULL) {
+                	if (gf_string2bytesize (tmp,
+                        	                (uint64_t *)&max_file_size)
+						!= 0) {
+				gf_log ("io-cache", GF_LOG_ERROR,
+                                	"invalid number format \"%s\" of "
+                                	"\"option max-file-size\"", tmp);
+                        	ret = -1;	
+                		goto out;
+			}
+
+		
+                	gf_log (this->name, GF_LOG_DEBUG,
+                        	"Reconfiguring max-file-size %"PRIu64"",
+			 	table->max_file_size);
+        	}
+  
+        	if ((max_file_size >= 0) & (min_file_size > max_file_size)) {
+                        gf_log ("io-cache", GF_LOG_ERROR, "minimum size (%"
+                                PRIu64") of a file that can be cached is "
+                                "greater than maximum size (%"PRIu64"). "
+				"Hence Defaulting to old value",
+                                table->min_file_size, table->max_file_size);
+                        ret = -1;
+			goto out;
+		}
+
+		table->min_file_size = min_file_size;
+		table->max_file_size = max_file_size;
+	}
+	
+	ioc_table_unlock (table);
+out:	
+	return ret;
+	
+}
+
 /*
  * init - 
  * @this: