versioning: add capabilities support

Change-Id: Ic63f7c9fa169ee37b796093554c59016fbbfaa46
Signed-off-by: Prasanna Kumar Kalever <prasanna.kalever@redhat.com>

5 files changed, 294 insertions, 3 deletions

diff --git a/utils/Makefile.am b/utils/Makefile.am
index bdebb52..6eadf79 100644
--- a/utils/Makefile.am
+++ b/utils/Makefile.am
@@ -1,16 +1,27 @@
 noinst_LTLIBRARIES = libgb.la
 
-libgb_la_SOURCES = common.c utils.c lru.c
+libgb_la_SOURCES = common.c utils.c lru.c capabilities.c
 
-noinst_HEADERS = common.h utils.h lru.h list.h
+noinst_HEADERS = common.h utils.h lru.h list.h capabilities.h
 
-libgb_la_CFLAGS = $(GFAPI_CFLAGS) -DDATADIR=\"$(localstatedir)\"          \
+libgb_la_CFLAGS = $(GFAPI_CFLAGS)                                              \
+                  -DDATADIR=\"$(localstatedir)\" -DCONFDIR=\"$(sysconfigdir)\" \
                   -I$(top_builddir)/ -I$(top_builddir)/rpc/rpcl
 
 libgb_la_LIBADD = $(GFAPI_LIBS)
 
 libgb_ladir = $(includedir)/gluster-block/utils
 
+EXTRA_DIST = gluster-block-caps.info
+
 DISTCLEANFILES = Makefile.in
 
 CLEANFILES = *~
+
+install-data-local:
+	$(MKDIR_P) $(DESTDIR)${sysconfigdir};                    \
+	$(INSTALL_DATA) gluster-block-caps.info                  \
+		$(DESTDIR)${sysconfigdir}/gluster-block-caps.info;
+
+uninstall-local:
+	rm -f $(DESTDIR)${sysconfigdir}/gluster-block-caps.info
diff --git a/utils/capabilities.c b/utils/capabilities.c
new file mode 100644
index 0000000..d44dc8f
--- /dev/null
+++ b/utils/capabilities.c
@@ -0,0 +1,109 @@
+/*
+  Copyright (c) 2018 Red Hat, Inc. <http://www.redhat.com>
+  This file is part of gluster-block.
+
+  This file is licensed to you under your choice of the GNU Lesser
+  General Public License, version 3 or any later version (LGPLv3 or
+  later), or the GNU General Public License, version 2 (GPLv2), in all
+  cases as published by the Free Software Foundation.
+*/
+
+
+# include "capabilities.h"
+
+
+int
+gbCapabilitiesEnumParse(const char *cap)
+{
+  int i;
+
+
+  if (!cap) {
+    return GB_CAP_MAX;
+  }
+
+  for (i = 0; i < GB_CAP_MAX; i++) {
+    if (!strcmp(cap, gbCapabilitiesLookup[i])) {
+      return i;
+    }
+  }
+
+  return i;
+}
+
+
+int
+gbSetCapabilties(blockResponse **c)
+{
+  FILE * fp;
+  char *line = NULL;
+  size_t len = 0;
+  int count = 0;
+  int ret = 0;
+  blockResponse *reply = *c;
+  gbCapObj *caps = NULL;
+  char *p, *sep;
+
+
+  fp = fopen(GB_CAPS_FILE, "r");
+  if (fp == NULL) {
+    return -1;
+  }
+
+  if (GB_ALLOC_N(caps, GB_CAP_MAX) < 0) {
+    fclose(fp);
+    return -1;
+  }
+
+  while ((getline(&line, &len, fp)) != -1) {
+    if (!line) {
+      continue;
+    }
+    if ((line[0] == '\n') || (line[0] == '#')) {
+      GB_FREE(line);
+      continue;
+    }
+
+    /* Part before ':' */
+    p = line;
+    sep = strchr(p, ':');
+    *sep = '\0';
+
+    ret = gbCapabilitiesEnumParse(p);
+    if (ret != GB_CAP_MAX) {
+      strncpy(caps[count].cap, gbCapabilitiesLookup[ret], 256);
+
+      /* Part after ':' and before '\n' */
+      p = sep + 1;
+      sep = strchr(p, '\n');
+      *sep = '\0';
+
+      while(isspace((unsigned char)*p)) p++;
+      ret = convertStringToTrillianParse(p);
+      if (ret >= 0) {
+        caps[count].status = ret;
+      } else {
+        ret = -1;
+        goto out;
+      }
+      count++;
+    }
+
+    GB_FREE(line);
+  }
+
+  if (GB_CAP_MAX != count) {
+    ret = -1;
+    goto out;
+  }
+
+  reply->xdata.xdata_len = GB_CAP_MAX * sizeof(gbCapObj);
+  reply->xdata.xdata_val = (char *) caps;
+
+  ret = 0;
+ out:
+  GB_FREE(line);
+  fclose(fp);
+
+  return ret;
+}
diff --git a/utils/capabilities.h b/utils/capabilities.h
new file mode 100644
index 0000000..b157d80
--- /dev/null
+++ b/utils/capabilities.h
@@ -0,0 +1,65 @@
+/*
+  Copyright (c) 2018 Red Hat, Inc. <http://www.redhat.com>
+  This file is part of gluster-block.
+
+  This file is licensed to you under your choice of the GNU Lesser
+  General Public License, version 3 or any later version (LGPLv3 or
+  later), or the GNU General Public License, version 2 (GPLv2), in all
+  cases as published by the Free Software Foundation.
+*/
+
+
+# include "block.h"
+# include "common.h"
+
+
+typedef struct gbCapObj {
+  char cap[256];
+  bool status;
+} gbCapObj;
+
+
+typedef struct gbCapResp {
+  int capMax;
+  gbCapObj *response;
+} gbCapResp;
+
+
+enum gbCapabilities {
+  GB_CREATE_CAP,
+  GB_CREATE_HA_CAP,
+  GB_CREATE_PREALLOC_CAP,
+  GB_CREATE_AUTH_CAP,
+
+  GB_DELETE_CAP,
+  GB_DELETE_FORCE_CAP,
+
+  GB_MODIFY_CAP,
+  GB_MODIFY_AUTH_CAP,
+
+  GB_JSON_CAP,
+
+  GB_CAP_MAX
+};
+
+
+static const char *const gbCapabilitiesLookup[] = {
+  [GB_CREATE_CAP]              = "create",
+  [GB_CREATE_HA_CAP]           = "create_ha",
+  [GB_CREATE_PREALLOC_CAP]     = "create_prealloc",
+  [GB_CREATE_AUTH_CAP]         = "create_auth",
+
+  [GB_DELETE_CAP]              = "delete",
+  [GB_DELETE_FORCE_CAP]        = "delete_force",
+
+  [GB_MODIFY_CAP]              = "modify",
+  [GB_MODIFY_AUTH_CAP]         = "modify_auth",
+
+  [GB_JSON_CAP]                = "json",
+
+  [GB_CAP_MAX]                 = NULL
+};
+
+
+int gbCapabilitiesEnumParse(const char *cap);
+int gbSetCapabilties (blockResponse **c);
diff --git a/utils/gluster-block-caps.info b/utils/gluster-block-caps.info
new file mode 100644
index 0000000..2dcdbd4
--- /dev/null
+++ b/utils/gluster-block-caps.info
@@ -0,0 +1,98 @@
+##
+# Nature: cli command
+#
+# Label: 'create'
+#
+# Description: capability to create block storage in local node
+#
+# Since: 0.1
+##
+create: true
+
+##
+# Nature: cli sub-command
+#
+# Label:  'ha'
+#
+# Description: capability to replicate configuration of block for high availability
+#
+# Since: 0.1
+##
+create_ha: true
+
+##
+# Nature: cli sub-command
+#
+# Label:  'prealloc'
+#
+# Description: capability to preallocate underline storage
+#
+# Since: 0.3
+##
+create_prealloc: true
+
+##
+# Nature: cli sub-command
+#
+# Label:  'auth'
+#
+# Description: capability to set CHAP authentication for block
+#
+# Since: 0.2
+##
+create_auth: true
+
+##
+# Nature: cli command
+#
+# Label: 'delete'
+#
+# Description: capability to delete a block storage
+#
+# Since: 0.1
+##
+delete: true
+
+##
+# Nature: cli command
+#
+# Label: 'force'
+#
+# Description: capability to delete a block storage forcefully
+#
+# Since: 0.1
+##
+delete_force: true
+
+##
+# Nature: cli command
+#
+# Label: 'modify'
+#
+# Description: capability to modify already existing block
+#
+# Since: 0.2
+##
+modify: true
+
+##
+# Nature: cli sub-command
+#
+# Label: 'auth'
+#
+# Description: capability to modify CHAP authentication caps for existing block
+#
+# Since: 0.2
+##
+modify_auth: true
+
+##
+# Nature: cli sub-command
+#
+# Label: '--json'
+#
+# Description: capability to furnish results of any command in json formated way
+#
+# Since: 0.2
+##
+json: true
diff --git a/utils/utils.h b/utils/utils.h
index 8a30d25..7141a3f 100644
--- a/utils/utils.h
+++ b/utils/utils.h
@@ -31,6 +31,9 @@
 
 # define  GB_LOCK_FILE           GB_INFODIR "/gluster-blockd.lock"
 # define  GB_UNIX_ADDRESS        GB_INFODIR "/gluster-blockd.socket"
+
+# define  GB_CAPS_FILE           CONFDIR "/gluster-block-caps.info"
+
 # define  GB_TCP_PORT            24010
 # define  GB_TCP_PORT_STR        "24010"
 
@@ -59,6 +62,11 @@
 # define  FAILED_CREATING_FILE      "failed while creating block file in gluster volume"
 # define  FAILED_CREATING_META      "failed while creating block meta file from volume"
 
+/* Target Capabilities */
+# define  FAILED_CAPS               "failed in capabilities check"
+# define  FAILED_REMOTE_CAPS        "failed in remote capabilities check"
+# define  FAILED_REMOTE_AYNC_CAPS   "failed in remote async capabilities check"
+
 /* Target List */
 # define  FAILED_LIST               "failed in list"