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authorCsaba Henk <csaba@gluster.com>2010-10-02 07:30:38 +0000
committerVijay Bellur <vijay@dev.gluster.com>2010-10-02 06:30:18 -0700
commit067d0e476abe42f1e290039cb903928080e90d8d (patch)
tree2dfa9c04911ddedf283c5e4fac9ff9c41fb28ee6 /libglusterfs/src/graph-print.c
parent1cc15f9b0057cd6c8843c8b9cbb36c02d334ec6f (diff)
implemented graph printing
Signed-off-by: Csaba Henk <csaba@gluster.com> Signed-off-by: Vijay Bellur <vijay@dev.gluster.com> BUG: 1750 (clean up volgen) URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=1750
Diffstat (limited to 'libglusterfs/src/graph-print.c')
-rw-r--r--libglusterfs/src/graph-print.c200
1 files changed, 200 insertions, 0 deletions
diff --git a/libglusterfs/src/graph-print.c b/libglusterfs/src/graph-print.c
new file mode 100644
index 000000000..a6c20c735
--- /dev/null
+++ b/libglusterfs/src/graph-print.c
@@ -0,0 +1,200 @@
+/*
+ Copyright (c) 2010 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/>.
+*/
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+#include <sys/uio.h>
+
+#include "common-utils.h"
+#include "xlator.h"
+#include "graph-mem-types.h"
+#include "graph-utils.h"
+
+
+
+struct gf_printer {
+ ssize_t (*write) (struct gf_printer *gp, char *buf, size_t len);
+ void *priv;
+};
+
+static ssize_t
+gp_write_file (struct gf_printer *gp, char *buf, size_t len)
+{
+ FILE *f = gp->priv;
+
+ if (fwrite (buf, len, 1, f) != 1) {
+ gf_log ("graph-print", GF_LOG_ERROR, "fwrite failed (%s)",
+ strerror (errno));
+
+ return -1;
+ }
+
+ return len;
+}
+
+static ssize_t
+gp_write_buf (struct gf_printer *gp, char *buf, size_t len)
+{
+ struct iovec *iov = gp->priv;
+
+ if (iov->iov_len < len) {
+ gf_log ("graph-print", GF_LOG_ERROR, "buffer full");
+
+ return -1;
+ }
+
+ memcpy (iov->iov_base, buf, len);
+ iov->iov_base += len;
+ iov->iov_len -= len;
+
+ return len;
+}
+
+static int
+gpprintf (struct gf_printer *gp, const char *format, ...)
+{
+ va_list arg;
+ char *str = NULL;
+ int ret = 0;
+
+ va_start (arg, format);
+ ret = gf_vasprintf (&str, format, arg);
+ va_end (arg);
+
+ if (ret < 0)
+ return ret;
+
+ ret = gp->write (gp, str, ret);
+
+ GF_FREE (str);
+
+ return ret;
+}
+
+static int
+glusterfs_graph_print (struct gf_printer *gp, glusterfs_graph_t *graph)
+{
+#define GPPRINTF(gp, fmt, ...) do { \
+ ret = gpprintf (gp, fmt, ## __VA_ARGS__); \
+ if (ret == -1) \
+ goto out; \
+ else \
+ len += ret; \
+} while (0)
+
+ xlator_t *trav = NULL;
+ data_pair_t *pair = NULL;
+ xlator_list_t *xch = NULL;
+ int ret = 0;
+ ssize_t len = 0;
+
+ if (!graph->first)
+ return 0;
+
+ for (trav = graph->first; trav->next; trav = trav->next);
+ for (; trav; trav = trav->prev) {
+ GPPRINTF (gp, "volume %s\n type %s\n", trav->name,
+ trav->type);
+
+ for (pair = trav->options->members_list; pair && pair->next;
+ pair = pair->next);
+ for (; pair; pair = pair->prev)
+ GPPRINTF (gp, " option %s %s\n", pair->key,
+ pair->value->data);
+
+ if (trav->children) {
+ GPPRINTF (gp, " subvolumes");
+
+ for (xch = trav->children; xch; xch = xch->next)
+ GPPRINTF (gp, " %s", xch->xlator->name);
+
+ GPPRINTF (gp, "\n");
+ }
+
+ GPPRINTF (gp, "end-volume\n");
+ if (trav != graph->first)
+ GPPRINTF (gp, "\n");
+ }
+
+ out:
+ if (ret == -1) {
+ gf_log ("graph-print", GF_LOG_ERROR, "printing failed");
+
+ return -1;
+ }
+
+ return len;
+
+#undef GPPRINTF
+}
+
+int
+glusterfs_graph_print_file (FILE *file, glusterfs_graph_t *graph)
+{
+ struct gf_printer gp = { .write = gp_write_file,
+ .priv = file
+ };
+
+ return glusterfs_graph_print (&gp, graph);
+}
+
+char *
+glusterfs_graph_print_buf (glusterfs_graph_t *graph)
+{
+ FILE *f = NULL;
+ struct iovec iov = {0,};
+ int len = 0;
+ char *buf = NULL;
+ struct gf_printer gp = { .write = gp_write_buf,
+ .priv = &iov
+ };
+
+ f = fopen ("/dev/null", "a");
+ if (!f) {
+ gf_log ("graph-print", GF_LOG_ERROR,
+ "cannot open /dev/null (%s)", strerror (errno));
+
+ return NULL;
+ }
+ len = glusterfs_graph_print_file (f, graph);
+ fclose (f);
+ if (len == -1)
+ return NULL;
+
+ buf = GF_CALLOC (1, len + 1, gf_graph_mt_buf);
+ if (!buf) {
+ gf_log ("graph-print", GF_LOG_ERROR, "Out of memory");
+
+ return NULL;
+ }
+ iov.iov_base = buf;
+ iov.iov_len = len;
+
+ len = glusterfs_graph_print (&gp, graph);
+ if (len == -1) {
+ GF_FREE (buf);
+
+ return NULL;
+ }
+
+ return buf;
+}