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-rw-r--r--gluster-block.c784
1 files changed, 784 insertions, 0 deletions
diff --git a/gluster-block.c b/gluster-block.c
new file mode 100644
index 0000000..a6e84d4
--- /dev/null
+++ b/gluster-block.c
@@ -0,0 +1,784 @@
+/*
+ Copyright (c) 2016 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.
+*/
+
+
+# define _GNU_SOURCE /* See feature_test_macros(7) */
+
+# include <string.h>
+# include <getopt.h>
+# include <uuid/uuid.h>
+
+# include "utils.h"
+# include "glfs-operations.h"
+# include "ssh-common.h"
+
+# define UUID_BUF_SIZE 50
+# define CFG_STRING_SIZE 256
+
+# define LIST "list"
+# define CREATE "create"
+# define DELETE "delete"
+# define INFO "info"
+# define MODIFY "modify"
+# define BLOCKHOST "block-host"
+# define HELP "help"
+
+# define GLFS_PATH "/backstores/user:glfs"
+# define TARGETCLI_GLFS "targetcli "GLFS_PATH
+# define TARGETCLI_ISCSI "targetcli /iscsi"
+# define ATTRIBUTES "generate_node_acls=1 demo_mode_write_protect=0"
+# define LIST_CMD "ls | grep ' %s ' | cut -d'[' -f2 | cut -d']' -f1"
+# define LUNS_LIST "ls | grep -v user:glfs | cut -d'-' -f2 | cut -d' ' -f2"
+
+# define IQN_PREFIX "iqn.2016-12.org.gluster-block:"
+
+# define MSERVER_DELIMITER ","
+
+
+
+typedef struct blockServerDef {
+ size_t nhosts;
+ char **hosts;
+} blockServerDef;
+typedef blockServerDef *blockServerDefPtr;
+
+
+static void
+glusterBlockHelp(void)
+{
+ MSG("%s",
+ "gluster-block (Version 0.1) \n"
+ " -c, --create <name> Create the gluster block\n"
+ " -v, --volume <vol> gluster volume name\n"
+ " -h, --host <gluster-node> node addr from gluster pool\n"
+ " -s, --size <size> block storage size in KiB|MiB|GiB|TiB..\n"
+ "\n"
+ " -l, --list List available gluster blocks\n"
+ "\n"
+ " -i, --info <name> Details about gluster block\n"
+ "\n"
+ " -m, --modify <RESIZE|AUTH> Modify the metadata\n"
+ "\n"
+ " -d, --delete <name> Delete the gluster block\n"
+ "\n"
+ " [-b, --block-host <IP1,IP2,IP3...>] block servers, clubbed with any option\n");
+}
+
+
+void
+blockServerDefFree(blockServerDefPtr blkServers)
+{
+ size_t i;
+
+ if (!blkServers)
+ return;
+
+ for (i = 0; i < blkServers->nhosts; i++)
+ GB_FREE(blkServers->hosts[i]);
+ GB_FREE(blkServers->hosts);
+ GB_FREE(blkServers);
+}
+
+
+static void
+glusterBlockDefFree(glusterBlockDefPtr blk)
+{
+ if (!blk)
+ return;
+
+ GB_FREE(blk->volume);
+ GB_FREE(blk->host);
+ GB_FREE(blk->filename);
+ GB_FREE(blk);
+}
+
+
+static blockServerDefPtr
+blockServerParse(char *blkServers)
+{
+ blockServerDefPtr list;
+ char *tmp = blkServers;
+ size_t i = 0;
+
+ if (!blkServers)
+ return NULL;
+
+ if (GB_ALLOC(list) < 0)
+ return NULL;
+
+ /* count number of servers */
+ while (*tmp) {
+ if (*tmp == ',')
+ list->nhosts++;
+ tmp++;
+ }
+ list->nhosts++;
+ tmp = blkServers; /* reset addr */
+
+
+ if (GB_ALLOC_N(list->hosts, list->nhosts) < 0)
+ goto fail;
+
+ for (i = 0; tmp != NULL; i++) {
+ if (GB_STRDUP(list->hosts[i], strsep(&tmp, MSERVER_DELIMITER)) < 0)
+ goto fail;
+ }
+
+ return list;
+
+ fail:
+ blockServerDefFree(list);
+ return NULL;
+}
+
+
+static size_t
+glusterBlockCreateParseSize(char *value)
+{
+ char *postfix;
+ char *tmp;
+ size_t sizef;
+
+ if (!value)
+ return -1;
+
+ sizef = strtod(value, &postfix);
+ if (sizef < 0) {
+ ERROR("%s", "size cannot be negative number\n");
+ return -1;
+ }
+
+ tmp = postfix;
+ if (*postfix == ' ')
+ tmp = tmp + 1;
+
+ switch (*tmp) {
+ case 'Y':
+ sizef *= 1024;
+ /* fall through */
+ case 'Z':
+ sizef *= 1024;
+ /* fall through */
+ case 'E':
+ sizef *= 1024;
+ /* fall through */
+ case 'P':
+ sizef *= 1024;
+ /* fall through */
+ case 'T':
+ sizef *= 1024;
+ /* fall through */
+ case 'G':
+ sizef *= 1024;
+ /* fall through */
+ case 'M':
+ sizef *= 1024;
+ /* fall through */
+ case 'K':
+ case 'k':
+ sizef *= 1024;
+ /* fall through */
+ case 'b':
+ case '\0':
+ return sizef;
+ break;
+ default:
+ ERROR("%s", "You may use k/K, M, G or T suffixes for "
+ "kilobytes, megabytes, gigabytes and terabytes.");
+ return -1;
+ }
+}
+
+
+static char *
+glusterBlockListGetHumanReadableSize(size_t bytes)
+{
+ char *size;
+ char *types[] = {"Byte(s)", "KiB", "MiB", "GiB",
+ "TiB", "PiB", "EiB", "ZiB", "YiB"};
+ size_t i;
+
+ if (bytes < 1024) {
+ asprintf(&size, "%zu %s", bytes, *(types));
+ return size;
+ }
+
+ for (i = 1; i < 8; i++) {
+ bytes /= 1024;
+ if (bytes < 1024) {
+ asprintf(&size, "%zu %s ", bytes, *(types + i));
+ return size;
+ }
+ }
+
+ return NULL;
+}
+
+
+static int
+glusterBlockCreate(int count, char **options, char *name)
+{
+ int c;
+ int ret = 0;
+ char *cmd = NULL;
+ char *exec = NULL;
+ char *iqn = NULL;
+ char *blkServers = NULL;
+ blockServerDefPtr list;
+ uuid_t out;
+ glusterBlockDefPtr blk;
+ char *sshout;
+ size_t i;
+
+
+ if (GB_ALLOC(blk) < 0)
+ return -1;
+
+ blk->filename = CALLOC(UUID_BUF_SIZE);
+
+ uuid_generate(out);
+ uuid_unparse(out, blk->filename);
+
+ if (!name) {
+ ERROR("%s", "Insufficient arguments supplied for"
+ "'gluster-block create'");
+ ret = -1;
+ goto out;
+ }
+
+ while (1) {
+ static const struct option long_options[] = {
+ {"volume", required_argument, 0, 'v'},
+ {"host", required_argument, 0, 'h'},
+ {"size", required_argument, 0, 's'},
+ {"block-host", required_argument, 0, 'b'},
+ {0, 0, 0, 0}
+ };
+
+ /* getopt_long stores the option index here. */
+ int option_index = 0;
+
+ c = getopt_long(count, options, "b:v:h:s:",
+ long_options, &option_index);
+
+ if (c == -1)
+ break;
+
+ switch (c) {
+ case 'b':
+ blkServers = optarg;
+ break;
+
+ case 'v':
+ GB_STRDUP(blk->volume, optarg);
+ ret++;
+ break;
+
+ case 'h':
+ GB_STRDUP(blk->host, optarg);
+ ret++;
+ break;
+
+ case 's':
+ blk->size = glusterBlockCreateParseSize(optarg);
+ ret++;
+ break;
+
+ case '?':
+ MSG("unrecognized option '%s'", options[optind-1]);
+ MSG("%s", "Hint: gluster-block --help");
+ goto out;
+
+ default:
+ break;
+ }
+ }
+
+ if (blkServers) {
+ list = blockServerParse(blkServers);
+ } else {
+ list = blockServerParse("localhost");
+ }
+
+ /* Print any remaining command line arguments (not options). */
+ if (optind < count) {
+ ERROR("%s", "non-option ARGV-elements: ");
+ while (optind < count)
+ printf("%s ", options[optind++]);
+ putchar('\n');
+
+ ret = -1;
+ goto out;
+ }
+
+ if (ret != 3) {
+ ERROR("%s", "Insufficient arguments supplied for"
+ "'gluster-block create'\n");
+ ret = -1;
+ goto out;
+ }
+
+ ret = glusterBlockCreateEntry(blk);
+ if (ret)
+ goto out;
+
+ if (asprintf(&cmd, "%s %s %s %zu %s@%s/%s", TARGETCLI_GLFS,
+ CREATE, name, blk->size, blk->volume, blk->host,
+ blk->filename) < 0)
+ goto out;
+
+ /* Created user-backed storage object LUN size 2147483648. */
+ for (i = 0; i < list->nhosts; i++) {
+ MSG("[OnHost: %s]", list->hosts[i]);
+ sshout = glusterBlockSSHRun(list->hosts[i], cmd, true);
+ if (!sshout) {
+ ret = -1;
+ goto out;
+ }
+
+ asprintf(&iqn, "%s%s-%s",
+ IQN_PREFIX, list->hosts[i], blk->filename);
+ asprintf(&exec, "%s %s %s", TARGETCLI_ISCSI, CREATE, iqn);
+ sshout = glusterBlockSSHRun(list->hosts[i], exec, true);
+ if (!sshout) {
+ ret = -1;
+ goto out;
+ }
+ GB_FREE(exec);
+
+
+ asprintf(&exec, "%s/%s/tpg1/luns %s %s/%s",
+ TARGETCLI_ISCSI, iqn, CREATE, GLFS_PATH, name);
+ sshout = glusterBlockSSHRun(list->hosts[i], exec, true);
+ if (!sshout) {
+ ret = -1;
+ goto out;
+ }
+ GB_FREE(exec);
+
+
+ asprintf(&exec, "%s/%s/tpg1 set attribute %s",
+ TARGETCLI_ISCSI, iqn, ATTRIBUTES);
+ sshout = glusterBlockSSHRun(list->hosts[i], exec, true);
+ if (!sshout) {
+ ret = -1;
+ goto out;
+ }
+ GB_FREE(exec);
+ GB_FREE(iqn);
+ putchar('\n');
+ }
+
+ out:
+ GB_FREE(cmd);
+ GB_FREE(exec);
+ GB_FREE(iqn);
+ glusterBlockDefFree(blk);
+ blockServerDefFree(list);
+
+ return ret;
+}
+
+
+static int
+glusterBlockParseCfgStringToDef(char* cfgstring,
+ glusterBlockDefPtr blk)
+{
+ int ret = 0;
+ char *p, *sep;
+
+ /* part before '@' is the volume name */
+ p = cfgstring;
+ sep = strchr(p, '@');
+ if (!sep) {
+ ret = -1;
+ goto fail;
+ }
+
+ *sep = '\0';
+ if (GB_STRDUP(blk->volume, p) < 0) {
+ ret = -1;
+ goto fail;
+ }
+
+ /* part between '@' and '/' is the server name */
+ p = sep + 1;
+ sep = strchr(p, '/');
+ if (!sep) {
+ ret = -1;
+ goto fail;
+ }
+
+ *sep = '\0';
+ if (GB_STRDUP(blk->host, p) < 0) {
+ ret = -1;
+ goto fail;
+ }
+
+ /* part between '/' and '(' is the filename */
+ p = sep + 1;
+ sep = strchr(p, '(');
+ if (!sep) {
+ ret = -1;
+ goto fail;
+ }
+
+ *(sep - 1) = '\0'; /* discard extra space at end of filename */
+ if (GB_STRDUP(blk->filename, p) < 0) {
+ ret = -1;
+ goto fail;
+ }
+
+ /* part between '(' and ')' is the size */
+ p = sep + 1;
+ sep = strchr(p, ')');
+ if (!sep) {
+ ret = -1;
+ goto fail;
+ }
+
+ *sep = '\0';
+ blk->size = glusterBlockCreateParseSize(p);
+ if (blk->size < 0) {
+ ret = -1;
+ goto fail;
+ }
+
+
+ /* part between ')' and '\n' is the status */
+ p = sep + 1;
+ sep = strchr(p, '\n');
+ if (!sep) {
+ ret = -1;
+ goto fail;
+ }
+
+ *sep = '\0';
+ if (!strcmp(p, " activated"))
+ blk->status = true;
+
+ return 0;
+
+ fail:
+ glusterBlockDefFree(blk);
+
+ return ret;
+}
+
+
+static char *
+getCfgstring(char* name, char *blkServer)
+{
+ FILE *fd;
+ char *cmd;
+ char *exec;
+ char *sshout;
+ char *buf = CALLOC(CFG_STRING_SIZE);
+
+ asprintf(&cmd, "%s %s", TARGETCLI_GLFS, LIST_CMD);
+ asprintf(&exec, cmd, name);
+
+ sshout = glusterBlockSSHRun(blkServer, exec, false);
+ if (!sshout) {
+ GB_FREE(buf);
+ buf = NULL;
+ goto fail;
+ }
+
+ fd = fopen(sshout, "r");
+ if (!fgets(buf, CFG_STRING_SIZE, fd)) {
+ GB_FREE(buf);
+ buf = NULL;
+ }
+
+ fail:
+ fclose(fd);
+ remove(sshout);
+ GB_FREE(sshout);
+ GB_FREE(cmd);
+ GB_FREE(exec);
+
+ return buf;
+}
+
+
+/* TODO: need to implement sessions [ list | detail ] [sid] */
+static int
+glusterBlockList(blockServerDefPtr blkServers)
+{
+ size_t i;
+ int ret;
+ char *cmd;
+ char *pos;
+ char *sshout;
+ char *cfgstring = NULL;
+ char buf[CFG_STRING_SIZE];
+ FILE *fd = NULL;
+ glusterBlockDefPtr blk = NULL;
+
+ MSG("%s", "BlockName Volname Host Size Status");
+
+ asprintf(&cmd, "%s %s", TARGETCLI_GLFS, LUNS_LIST);
+
+ for (i = 0; i < blkServers->nhosts; i++) {
+ MSG("[OnHost: %s]", blkServers->hosts[i]);
+ sshout = glusterBlockSSHRun(blkServers->hosts[i], cmd, false);
+ if (!sshout) {
+ ret = -1;
+ goto fail;
+ }
+
+ fd = fopen(sshout, "r");
+ while (fgets(buf, sizeof(buf), fd)) {
+ pos = strtok(buf, "\n");
+
+ cfgstring = getCfgstring(pos, blkServers->hosts[i]);
+ if (!cfgstring) {
+ ret = -1;
+ goto fail;
+ }
+
+ if (GB_ALLOC(blk) < 0)
+ goto fail;
+
+ ret = glusterBlockParseCfgStringToDef(cfgstring, blk);
+ if (ret)
+ goto fail;
+
+ fprintf(stdout, " %s %s %s %s %s\n",
+ pos, blk->volume, blk->host,
+ glusterBlockListGetHumanReadableSize(blk->size),
+ blk->status ? "Online" : "Offline");
+
+ GB_FREE(cfgstring);
+ glusterBlockDefFree(blk);
+ }
+
+ fclose(fd);
+ remove(sshout);
+ GB_FREE(sshout);
+ }
+
+ GB_FREE(cmd);
+ return 0;
+
+ fail:
+ fclose(fd);
+ remove(sshout);
+ glusterBlockDefFree(blk);
+ GB_FREE(cfgstring);
+
+ GB_FREE(sshout);
+ GB_FREE(cmd);
+
+ return -1;
+}
+
+
+static int
+glusterBlockDelete(char* name, blockServerDefPtr blkServers)
+{
+ size_t i;
+ int ret;
+ char *cmd;
+ char *exec = NULL;
+ char *sshout;
+ char *cfgstring = NULL;
+ char *iqn = NULL;
+ glusterBlockDefPtr blk = NULL;
+
+ asprintf(&cmd, "%s %s %s", TARGETCLI_GLFS, DELETE, name);
+
+ for (i = 0; i < blkServers->nhosts; i++) {
+ MSG("[OnHost: %s]", blkServers->hosts[i]);
+ if (cfgstring)
+ GB_FREE(cfgstring);
+ cfgstring = getCfgstring(name, blkServers->hosts[i]);
+ if (!cfgstring) {
+ ret = -1;
+ goto fail;
+ }
+
+ sshout = glusterBlockSSHRun(blkServers->hosts[i], cmd, true);
+ if (!sshout) {
+ ret = -1;
+ goto fail;
+ }
+
+ /* cfgstring is constant across all tcmu nodes */
+ if (!blk) {
+ if (GB_ALLOC(blk) < 0)
+ goto fail;
+
+ ret = glusterBlockParseCfgStringToDef(cfgstring, blk);
+ if (ret)
+ goto fail;
+ }
+
+ asprintf(&iqn, "%s%s-%s",
+ IQN_PREFIX, blkServers->hosts[i], blk->filename);
+ asprintf(&exec, "%s %s %s", TARGETCLI_ISCSI, DELETE, iqn);
+ sshout = glusterBlockSSHRun(blkServers->hosts[i], exec, true);
+ if (!sshout) {
+ ret = -1;
+ goto fail;
+ }
+ GB_FREE(exec);
+ GB_FREE(iqn);
+ }
+
+ ret = glusterBlockDeleteEntry(blk);
+
+ fail:
+ glusterBlockDefFree(blk);
+ GB_FREE(cfgstring);
+ GB_FREE(iqn);
+ GB_FREE(exec);
+ GB_FREE(cmd);
+
+ return ret;
+}
+
+
+static int
+glusterBlockInfo(char* name, blockServerDefPtr blkServers)
+{
+ size_t i;
+ int ret = 0;
+ char *cmd;
+ char *sshout;
+
+ asprintf(&cmd, "%s/%s %s", TARGETCLI_GLFS, name, INFO);
+
+ for (i = 0; i < blkServers->nhosts; i++) {
+ MSG("[OnHost: %s]", blkServers->hosts[i]);
+ sshout = glusterBlockSSHRun(blkServers->hosts[i], cmd, true);
+ if (!sshout)
+ ret = -1;
+ putchar('\n');
+ }
+
+ GB_FREE(cmd);
+ return ret;
+}
+
+
+static int
+glusterBlockParseArgs(int count, char **options)
+{
+ int c;
+ int ret = 0;
+ int optFlag = 0;
+ char *block = NULL;
+ char *blkServers = NULL;
+ blockServerDefPtr list = NULL;
+
+ while (1) {
+ static const struct option long_options[] = {
+ {HELP, no_argument, 0, 'h'},
+ {CREATE, required_argument, 0, 'c'},
+ {DELETE, required_argument, 0, 'd'},
+ {LIST, no_argument, 0, 'l'},
+ {INFO, required_argument, 0, 'i'},
+ {MODIFY, required_argument, 0, 'm'},
+ {BLOCKHOST, required_argument, 0, 'b'},
+ {0, 0, 0, 0}
+ };
+
+ /* getopt_long stores the option index here. */
+ int option_index = 0;
+
+ c = getopt_long(count, options, "hc:b:d:lim:",
+ long_options, &option_index);
+
+ /* Detect the end of the options. */
+ if (c == -1)
+ break;
+
+ switch (c) {
+ case 'b':
+ blkServers = optarg;
+ if (optFlag)
+ goto opt;
+ break;
+
+ case 'c':
+ ret = glusterBlockCreate(count, options, optarg);
+ break;
+
+ case 'l':
+ case 'd':
+ case 'i':
+ if (optFlag) /* more than one main opterations ?*/
+ goto out;
+ optFlag = c;
+ block = optarg;
+ if (blkServers)
+ goto opt;
+ break;
+
+ case 'm':
+ MSG("option --modify yet TODO '%s'", optarg);
+ break;
+
+ case 'h':
+ glusterBlockHelp();
+ break;
+
+ case '?':
+ /* getopt_long already printed an error message. */
+ break;
+ }
+ }
+
+ opt:
+ if (blkServers) {
+ list = blockServerParse(blkServers);
+ } else {
+ list = blockServerParse("localhost");
+ }
+
+ switch (optFlag) {
+ case 'l':
+ ret = glusterBlockList(list);
+ break;
+ case 'i':
+ ret = glusterBlockInfo(block, list);
+ break;
+ case 'd':
+ ret = glusterBlockDelete(block, list);
+ break;
+ }
+
+ out:
+ if (ret == 0 && optind < count) {
+ ERROR("%s", "Unable to parse elements: ");
+ while (optind < count)
+ printf("%s ", options[optind++]);
+ putchar('\n');
+ MSG("Hint: %s --help", options[0]);
+ }
+
+ blockServerDefFree(list);
+ return ret;
+}
+
+
+int
+main(int argc, char *argv[])
+{
+ int ret;
+ if (argc <= 1)
+ glusterBlockHelp();
+
+ ret = glusterBlockParseArgs(argc, argv);
+
+ return ret;
+}
generated by cgit (git 2.34.1) at 2024-04-24 23:50:10 +0000