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authorRaghavendra Bhat <raghavendrabhat@gluster.com>2012-02-20 18:42:37 +0530
committerVijay Bellur <vijay@gluster.com>2012-02-20 06:59:11 -0800
commitdb20a0f8a99f715a77366e518720612f043d5c9e (patch)
tree8d0a52e8e8833686e5b9358f3c492a94757c93ea /libglusterfs/src/event-history.c
parentf764516c2e526624ce0088963924ff2d88304553 (diff)
libglusterfs: Implement circular buffer and event history
Implement circular buffer framework, so that it can be used by other components such as event history management. And event history is implemented which can be used by xlator to dump some information to a file (such as information of some structure etc). Through statedump, history of each xlator can be dumped. An option called history should be given to the statedump command. Change-Id: I7c5e8f6bd1018584eaee856e933e7c4b94c6709c BUG: 795419 Signed-off-by: Raghavendra Bhat <raghavendrabhat@gluster.com> Reviewed-on: http://review.gluster.com/2769 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Vijay Bellur <vijay@gluster.com>
Diffstat (limited to 'libglusterfs/src/event-history.c')
-rw-r--r--libglusterfs/src/event-history.c90
1 files changed, 90 insertions, 0 deletions
diff --git a/libglusterfs/src/event-history.c b/libglusterfs/src/event-history.c
new file mode 100644
index 00000000000..812267b7c0b
--- /dev/null
+++ b/libglusterfs/src/event-history.c
@@ -0,0 +1,90 @@
+/*
+ Copyright (c) 2012 Gluster, Inc. <http://www.gluster.com>
+ This file is part of GlusterFS.
+
+ GlusterFS is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published
+ by the Free Software Foundation; either version 3 of the License,
+ or (at your option) any later version.
+
+ GlusterFS is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see
+ <http://www.gnu.org/licenses/>.
+*/
+
+#include "event-history.h"
+
+eh_t *
+eh_new (size_t buffer_size, gf_boolean_t use_buffer_once)
+{
+ eh_t *history = NULL;
+ buffer_t *buffer = NULL;
+
+ history = GF_CALLOC (1, sizeof (eh_t), gf_common_mt_eh_t);
+ if (!history) {
+ gf_log ("", GF_LOG_ERROR, "allocating history failed.");
+ goto out;
+ }
+
+ buffer = cb_buffer_new (buffer_size, use_buffer_once);
+ if (!buffer) {
+ gf_log ("", GF_LOG_ERROR, "allocating circular buffer failed");
+ GF_FREE (history);
+ history = NULL;
+ }
+
+ history->buffer = buffer;
+
+ pthread_mutex_init (&history->lock, NULL);
+out:
+ return history;
+}
+
+void
+eh_dump (eh_t *history, void *data,
+ int (dump_fn) (circular_buffer_t *buffer, void *data))
+{
+ if (!history) {
+ gf_log ("", GF_LOG_DEBUG, "history is NULL");
+ goto out;
+ }
+
+ cb_buffer_dump (history->buffer, data, dump_fn);
+
+out:
+ return;
+}
+
+int
+eh_save_history (eh_t *history, void *data)
+{
+ int ret = -1;
+
+ ret = cb_add_entry_buffer (history->buffer, data);
+
+ return ret;
+}
+
+int
+eh_destroy (eh_t *history)
+{
+ if (!history) {
+ gf_log ("", GF_LOG_INFO, "history for the xlator is "
+ "NULL");
+ return -1;
+ }
+
+ cb_buffer_destroy (history->buffer);
+ history->buffer = NULL;
+
+ pthread_mutex_destroy (&history->lock);
+
+ GF_FREE (history);
+
+ return 0;
+}