glusterd/cli: cli to get local state representation from glusterd

Currently there is no existing CLI that can be used to get the
local state representation of the cluster as maintained in glusterd
in a readable as well as parseable format.

The CLI added has the following usage:

 # gluster get-state [daemon] [odir <path/to/output/dir>] [file <filename>]

This would dump data points that reflect the local state
representation of the cluster as maintained in glusterd (no other
daemons are supported as of now) to a file inside the specified
output directory. The default output directory and filename is
/var/run/gluster and glusterd_state_<timestamp> respectively. The
option for specifying the daemon name leaves room to add support for
other daemons in the future. Following are the data points captured
as of now to represent the state from the local glusterd pov:

 * Peer:
    - Primary hostname
    - uuid
    - state
    - connection status
    - List of hostnames

 * Volumes:
    - name, id, transport type, status
    - counts: bricks, snap, subvol, stripe, arbiter, disperse,
 redundancy
    - snapd status
    - quorum status
    - tiering related information
    - rebalance status
    - replace bricks status
    - snapshots

 * Bricks:
    - Path, hostname (for all bricks these info will be shown)
    - port, rdma port, status, mount options, filesystem type and
signed in status for bricks running locally.

 * Services:
    - name, online status for initialised services

 * Others:
    - Base port, last allocated port
    - op-version
    - MYUUID

Change-Id: I4a45cc5407ab92d8afdbbd2098ece851f7e3d618
BUG: 1353156
Signed-off-by: Samikshan Bairagya <samikshan@gmail.com>
Reviewed-on: http://review.gluster.org/14873
Reviewed-by: Avra Sengupta <asengupt@redhat.com>
Smoke: Gluster Build System <jenkins@build.gluster.org>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
Reviewed-by: Atin Mukherjee <amukherj@redhat.com>

3 files changed, 38 insertions, 5 deletions

diff --git a/libglusterfs/src/Makefile.am b/libglusterfs/src/Makefile.am
index 2d1cb0fdca3..a288e703ed4 100644
--- a/libglusterfs/src/Makefile.am
+++ b/libglusterfs/src/Makefile.am
@@ -6,9 +6,10 @@ libglusterfs_la_CFLAGS = $(GF_CFLAGS) $(GF_DARWIN_LIBGLUSTERFS_CFLAGS) \
 libglusterfs_la_CPPFLAGS = $(GF_CPPFLAGS) -D__USE_FILE_OFFSET64 \
 	-DXLATORDIR=\"$(libdir)/glusterfs/$(PACKAGE_VERSION)/xlator\" \
 	-DXLATORPARENTDIR=\"$(libdir)/glusterfs/$(PACKAGE_VERSION)\" \
-	-I$(top_srcdir)/rpc/rpc-lib/src/ -I$(CONTRIBDIR)/rbtree \
-	-I$(CONTRIBDIR)/libexecinfo ${ARGP_STANDALONE_CPPFLAGS} \
-	-DSBIN_DIR=\"$(sbindir)\" -I$(CONTRIBDIR)/timer-wheel
+	-I$(top_srcdir)/rpc/xdr/src/ -I$(top_srcdir)/rpc/rpc-lib/src/ \
+	-I$(CONTRIBDIR)/rbtree -I$(CONTRIBDIR)/libexecinfo \
+	${ARGP_STANDALONE_CPPFLAGS} -DSBIN_DIR=\"$(sbindir)\" \
+	-I$(CONTRIBDIR)/timer-wheel
 
 libglusterfs_la_LIBADD = @LEXLIB@ $(ZLIB_LIBS) $(MATH_LIB) $(UUID_LIBS)
 libglusterfs_la_LDFLAGS = -version-info $(LIBGLUSTERFS_LT_VERSION)
@@ -35,9 +36,9 @@ libglusterfs_la_SOURCES = dict.c xlator.c logging.c \
 	compound-fop-utils.c throttle-tbf.c
 
 nodist_libglusterfs_la_SOURCES = y.tab.c graph.lex.c defaults.c
-nodist_libglusterfs_la_HEADERS = y.tab.h glusterfs-fops.h
+nodist_libglusterfs_la_HEADERS = y.tab.h glusterfs-fops.h cli1-xdr.h
 
-BUILT_SOURCES = graph.lex.c defaults.c glusterfs-fops.h eventtypes.h
+BUILT_SOURCES = graph.lex.c defaults.c glusterfs-fops.h eventtypes.h cli1-xdr.h
 
 libglusterfs_la_HEADERS = common-utils.h defaults.h default-args.h \
 	dict.h glusterfs.h hashfn.h timespec.h logging.h xlator.h \
@@ -99,6 +100,12 @@ $(top_srcdir)/rpc/xdr/src/glusterfs-fops.h: $(top_srcdir)/rpc/xdr/src/glusterfs-
 glusterfs-fops.h: $(top_srcdir)/rpc/xdr/src/glusterfs-fops.h
 	cp $(top_srcdir)/rpc/xdr/src/glusterfs-fops.h .
 
+$(top_srcdir)/rpc/xdr/src/cli1-xdr.h: $(top_srcdir)/rpc/xdr/src/cli1-xdr.x
+	$(MAKE) -C $(top_builddir)/rpc/xdr/src/ `basename $@`
+
+cli1-xdr.h: $(top_srcdir)/rpc/xdr/src/cli1-xdr.h
+	cp $(top_srcdir)/rpc/xdr/src/cli1-xdr.h .
+
 CLEANFILES = $(nodist_libglusterfs_la_SOURCES) $(nodist_libglusterfs_la_HEADERS)
 
 if UNITTEST
diff --git a/libglusterfs/src/common-utils.c b/libglusterfs/src/common-utils.c
index 8dc5141247e..351eb4daaec 100644
--- a/libglusterfs/src/common-utils.c
+++ b/libglusterfs/src/common-utils.c
@@ -46,6 +46,7 @@
 #include "globals.h"
 #include "lkowner.h"
 #include "syscall.h"
+#include "cli1-xdr.h"
 #include <ifaddrs.h>
 #include "libglusterfs-messages.h"
 
@@ -53,6 +54,18 @@
 #define AI_ADDRCONFIG 0
 #endif /* AI_ADDRCONFIG */
 
+char *vol_type_str[] = {"Distribute",
+                        "Stripe",
+                        "Replicate",
+                        "Striped-Replicate",
+                        "Disperse",
+                        "Tier",
+                        "Distributed-Stripe",
+                        "Distributed-Replicate",
+                        "Distributed-Striped-Replicate",
+                        "Distributed-Disperse",
+                       };
+
 typedef int32_t (*rw_op_t)(int32_t fd, char *buf, int32_t size);
 typedef int32_t (*rwv_op_t)(int32_t fd, const struct iovec *buf, int32_t size);
 
@@ -2723,6 +2736,16 @@ out:
 }
 
 int
+get_vol_type (int type, int dist_count, int brick_count)
+{
+        if ((type != GF_CLUSTER_TYPE_TIER) && (type > 0) &&
+             (dist_count < brick_count))
+              type = type + GF_CLUSTER_TYPE_MAX - 1;
+
+        return type;
+}
+
+int
 validate_brick_name (char *brick)
 {
         char *delimiter = NULL;
diff --git a/libglusterfs/src/common-utils.h b/libglusterfs/src/common-utils.h
index 4bcb6f9f2e0..3deb6bd43c9 100644
--- a/libglusterfs/src/common-utils.h
+++ b/libglusterfs/src/common-utils.h
@@ -209,6 +209,8 @@ struct list_node {
         struct list_head list;
 };
 
+extern char *vol_type_str[];
+
 struct list_node *list_node_add (void *ptr, struct list_head *list);
 struct list_node *list_node_add_order (void *ptr, struct list_head *list,
                                        int (*compare)(struct list_head *,
@@ -765,6 +767,7 @@ void gf_array_insertionsort (void *a, int l, int r, size_t elem_size,
 int gf_is_str_int (const char *value);
 
 char *gf_uint64_2human_readable (uint64_t);
+int get_vol_type (int type, int dist_count, int brick_count);
 int validate_brick_name (char *brick);
 char *get_host_name (char *word, char **host);
 char *get_path_name (char *word, char **path);