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/*
Copyright (c) 2007-2012 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/>.
*/
#ifndef _CONFIG_H
#define _CONFIG_H
#include "config.h"
#endif
#include "globals.h"
#include "glusterfs.h"
#include "dict.h"
#include "xlator.h"
#include "logging.h"
#include "run.h"
#include "defaults.h"
#include "compat.h"
#include "compat-errno.h"
#include "glusterd.h"
#include "glusterd-sm.h"
#include "glusterd-op-sm.h"
#include "glusterd-utils.h"
#include "glusterd-store.h"
#include "glusterd-hooks.h"
extern int mkdir_if_missing (char *dir);
#define EMPTY ""
char glusterd_hook_dirnames[GD_OP_MAX][256] =
{
[GD_OP_NONE] = EMPTY,
[GD_OP_CREATE_VOLUME] = "create",
[GD_OP_START_BRICK] = EMPTY,
[GD_OP_STOP_BRICK] = EMPTY,
[GD_OP_DELETE_VOLUME] = "delete",
[GD_OP_START_VOLUME] = "start",
[GD_OP_STOP_VOLUME] = "stop",
[GD_OP_DEFRAG_VOLUME] = EMPTY,
[GD_OP_ADD_BRICK] = "add-brick",
[GD_OP_REMOVE_BRICK] = "remove-brick",
[GD_OP_REPLACE_BRICK] = EMPTY,
[GD_OP_SET_VOLUME] = "set",
[GD_OP_RESET_VOLUME] = EMPTY,
[GD_OP_SYNC_VOLUME] = EMPTY,
[GD_OP_LOG_ROTATE] = EMPTY,
[GD_OP_GSYNC_SET] = EMPTY,
[GD_OP_PROFILE_VOLUME] = EMPTY,
[GD_OP_QUOTA] = EMPTY,
[GD_OP_STATUS_VOLUME] = EMPTY,
[GD_OP_REBALANCE] = EMPTY,
[GD_OP_HEAL_VOLUME] = EMPTY,
[GD_OP_STATEDUMP_VOLUME] = EMPTY,
[GD_OP_LIST_VOLUME] = EMPTY,
[GD_OP_CLEARLOCKS_VOLUME] = EMPTY,
[GD_OP_DEFRAG_BRICK_VOLUME] = EMPTY,
};
#undef EMPTY
static inline gf_boolean_t
glusterd_is_hook_enabled (char *script)
{
return (script[0] == 'S');
}
int
glusterd_hooks_create_hooks_directory (char *basedir)
{
int ret = -1;
int op = GD_OP_NONE;
int type = GD_COMMIT_HOOK_NONE;
char version_dir[PATH_MAX] = {0, };
char path[PATH_MAX] = {0, };
char *cmd_subdir = NULL;
char type_subdir[GD_COMMIT_HOOK_MAX][256] = {{0, },
"pre",
"post"};
glusterd_conf_t *priv = NULL;
priv = THIS->private;
snprintf (path, sizeof (path), "%s/hooks", basedir);
ret = mkdir_if_missing (path);
if (ret) {
gf_log (THIS->name, GF_LOG_CRITICAL, "Unable to create %s due"
"to %s", path, strerror (errno));
goto out;
}
GLUSTERD_GET_HOOKS_DIR (version_dir, GLUSTERD_HOOK_VER, priv);
ret = mkdir_if_missing (version_dir);
if (ret) {
gf_log (THIS->name, GF_LOG_CRITICAL, "Unable to create %s due "
"to %s", version_dir, strerror (errno));
goto out;
}
for (op = GD_OP_NONE+1; op < GD_OP_MAX; op++) {
cmd_subdir = glusterd_hooks_get_hooks_cmd_subdir (op);
if (strlen (cmd_subdir) == 0)
continue;
snprintf (path, sizeof (path), "%s/%s", version_dir,
cmd_subdir);
ret = mkdir_if_missing (path);
if (ret) {
gf_log (THIS->name, GF_LOG_CRITICAL,
"Unable to create %s due to %s",
path, strerror (errno));
goto out;
}
for (type = GD_COMMIT_HOOK_PRE; type < GD_COMMIT_HOOK_MAX;
type++) {
snprintf (path, sizeof (path), "%s/%s/%s",
version_dir, cmd_subdir, type_subdir[type]);
ret = mkdir_if_missing (path);
if (ret) {
gf_log (THIS->name, GF_LOG_CRITICAL,
"Unable to create %s due to %s",
path, strerror (errno));
goto out;
}
}
}
ret = 0;
out:
return ret;
}
char*
glusterd_hooks_get_hooks_cmd_subdir (glusterd_op_t op)
{
GF_ASSERT ((op > GD_OP_NONE) && (op < GD_OP_MAX));
return glusterd_hook_dirnames[op];
}
int
glusterd_hooks_run_hooks (char *hooks_path, dict_t *op_ctx)
{
xlator_t *this = NULL;
glusterd_conf_t *priv = NULL;
runner_t runner = {0, };
struct dirent *entry = NULL;
DIR *hookdir = NULL;
char *volname = NULL;
char **lines = NULL;
int N = 8; /*arbitrary*/
int lineno = 0;
int line_count = 0;
int ret = -1;
this = THIS;
priv = this->private;
ret = dict_get_str (op_ctx, "volname", &volname);
if (ret) {
gf_log (this->name, GF_LOG_CRITICAL, "Failed to get volname "
"from operation context");
goto out;
}
hookdir = opendir (hooks_path);
if (!hookdir) {
ret = -1;
gf_log (this->name, GF_LOG_ERROR, "Failed to open dir %s, due "
"to %s", hooks_path, strerror (errno));
goto out;
}
lines = GF_CALLOC (1, N * sizeof (*lines), gf_gld_mt_charptr);
if (!lines) {
ret = -1;
goto out;
}
ret = -1;
line_count = 0;
glusterd_for_each_entry (entry, hookdir);
while (entry) {
if (line_count == N-1) {
N *= 2;
lines = GF_REALLOC (lines, N * sizeof (char *));
if (!lines)
goto out;
}
if (glusterd_is_hook_enabled (entry->d_name)) {
lines[line_count] = gf_strdup (entry->d_name);
line_count++;
}
glusterd_for_each_entry (entry, hookdir);
}
lines[line_count] = NULL;
lines = GF_REALLOC (lines, (line_count + 1) * sizeof (char *));
if (!lines)
goto out;
qsort (lines, line_count, sizeof (*lines), glusterd_compare_lines);
for (lineno = 0; lineno < line_count; lineno++) {
runinit (&runner);
runner_argprintf (&runner, "%s/%s", hooks_path, lines[lineno]);
/*Add future command line arguments to hook scripts below*/
runner_argprintf (&runner, "--volname=%s", volname);
ret = runner_run_reuse (&runner);
if (ret) {
runner_log (&runner, this->name, GF_LOG_ERROR,
"Failed to execute script");
} else {
runner_log (&runner, this->name, GF_LOG_INFO,
"Ran script");
}
runner_end (&runner);
}
ret = 0;
out:
if (lines) {
for (lineno = 0; lineno < line_count+1; lineno++)
if (lines[lineno])
GF_FREE (lines[lineno]);
GF_FREE (lines);
}
if (hookdir)
closedir (hookdir);
return ret;
}
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