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/*
Copyright (c) 2008-2012 Red Hat, Inc. <http://www.redhat.com>
This file is part of GlusterFS.
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 <glusterfs/defaults.h>
#include "read-only-common.h"
#include "read-only-mem-types.h"
#include "read-only.h"
int32_t
mem_acct_init(xlator_t *this)
{
int ret = -1;
ret = xlator_mem_acct_init(this, gf_read_only_mt_end + 1);
if (ret)
gf_log(this->name, GF_LOG_ERROR,
"Memory accounting "
"initialization failed.");
return ret;
}
int32_t
init(xlator_t *this)
{
int ret = -1;
read_only_priv_t *priv = NULL;
if (!this->children || this->children->next) {
gf_log(this->name, GF_LOG_ERROR,
"translator not configured with exactly one child");
return -1;
}
if (!this->parents) {
gf_log(this->name, GF_LOG_WARNING, "dangling volume. check volfile ");
}
priv = GF_CALLOC(1, sizeof(*priv), gf_read_only_mt_priv_t);
if (!priv)
goto out;
this->private = priv;
GF_OPTION_INIT("read-only", priv->readonly_or_worm_enabled, bool, out);
ret = 0;
out:
return ret;
}
int
reconfigure(xlator_t *this, dict_t *options)
{
read_only_priv_t *priv = NULL;
int ret = -1;
gf_boolean_t readonly_or_worm_enabled = _gf_false;
priv = this->private;
GF_ASSERT(priv);
GF_OPTION_RECONF("read-only", readonly_or_worm_enabled, options, bool, out);
priv->readonly_or_worm_enabled = readonly_or_worm_enabled;
ret = 0;
out:
gf_log(this->name, GF_LOG_DEBUG, "returning %d", ret);
return ret;
}
void
fini(xlator_t *this)
{
read_only_priv_t *priv = NULL;
priv = this->private;
if (!priv)
return;
this->private = NULL;
GF_FREE(priv);
return;
}
struct xlator_fops fops = {
.mknod = ro_mknod,
.mkdir = ro_mkdir,
.unlink = ro_unlink,
.rmdir = ro_rmdir,
.symlink = ro_symlink,
.rename = ro_rename,
.link = ro_link,
.truncate = ro_truncate,
.open = ro_open,
.writev = ro_writev,
.setxattr = ro_setxattr,
.fsetxattr = ro_fsetxattr,
.removexattr = ro_removexattr,
.fsyncdir = ro_fsyncdir,
.ftruncate = ro_ftruncate,
.create = ro_create,
.setattr = ro_setattr,
.fsetattr = ro_fsetattr,
.xattrop = ro_xattrop,
.fxattrop = ro_fxattrop,
.inodelk = ro_inodelk,
.finodelk = ro_finodelk,
.entrylk = ro_entrylk,
.fentrylk = ro_fentrylk,
.lk = ro_lk,
.fallocate = ro_fallocate,
};
struct xlator_cbks cbks = {};
struct volume_options options[] = {
{.key = {"read-only"},
.type = GF_OPTION_TYPE_BOOL,
.default_value = "off",
/*.validate_fn = validate_boolean,*/
.op_version = {1},
.flags = OPT_FLAG_SETTABLE,
.description = "When \"on\", makes a volume read-only. It is turned "
"\"off\" by default."},
{.key = {NULL}},
};
xlator_api_t xlator_api = {
.init = init,
.fini = fini,
.reconfigure = reconfigure,
.mem_acct_init = mem_acct_init,
.op_version = {1}, /* Present from the initial version */
.fops = &fops,
.cbks = &cbks,
.options = options,
.identifier = "read-only",
.category = GF_TECH_PREVIEW,
};
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