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/*
Copyright (c) 2006-2010 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 Affero 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
Affero General Public License for more details.
You should have received a copy of the GNU Affero 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 "glusterfs.h"
#include "xlator.h"
#include "meta.h"
/*
* This file contains fops for the files and directories in
* an xlator directory
*/
/* /.meta/xlators/.../type */
int32_t
meta_xlator_type_readv (call_frame_t *frame, xlator_t *this,
dict_t *fd, size_t size, off_t offset)
{
meta_private_t *priv = (meta_private_t *) this->private;
meta_dirent_t *root = priv->tree;
data_t *path_data = dict_get (fd, this->name);
if (path_data) {
const char *path = data_to_str (path_data);
meta_dirent_t *file = lookup_meta_entry (root, path, NULL);
xlator_t *view_xlator = file->view_xlator;
int type_size;
type_size = strlen (view_xlator->type);
struct iovec vec;
vec.iov_base = view_xlator->type + offset;
vec.iov_len = min (type_size - offset, size);
STACK_UNWIND (frame, vec.iov_len, 0, &vec, 1);
return 0;
}
}
int32_t
meta_xlator_type_getattr (call_frame_t *frame,
xlator_t *this,
const char *path)
{
meta_private_t *priv = (meta_private_t *) this->private;
meta_dirent_t *root = priv->tree;
meta_dirent_t *file = lookup_meta_entry (root, path, NULL);
xlator_t *view_xlator = file->view_xlator;
file->stbuf->st_size = strlen (view_xlator->type);
STACK_UNWIND (frame, 0, 0, file->stbuf);
return 0;
}
struct xlator_fops meta_xlator_type_fops = {
.readv = meta_xlator_type_readv,
.getattr = meta_xlator_type_getattr
};
/*
* fops for the "view" directory
* {xlator}/view shows the filesystem as it appears
* to {xlator}
*/
static int32_t
meta_xlator_view_getattr_cbk (call_frame_t *frame, void *cookie,
xlator_t *this, int32_t op_ret, int32_t op_errno,
struct stat *buf)
{
STACK_UNWIND (frame, op_ret, op_errno, buf);
return 0;
}
int32_t
meta_xlator_view_getattr (call_frame_t *frame,
xlator_t *this,
const char *path)
{
meta_private_t *priv = (meta_private_t *) this->private;
meta_dirent_t *root = priv->tree;
char *op_path = NULL;
meta_dirent_t *file = lookup_meta_entry (root, path, &op_path);
if (op_path) {
STACK_WIND (frame, meta_xlator_view_getattr_cbk, file->view_xlator,
file->view_xlator->fops->getattr,
op_path);
}
else {
STACK_UNWIND (frame, 0, 0, file->stbuf);
}
return 0;
}
static int32_t
meta_xlator_view_readdir_cbk (call_frame_t *frame, void *cookie,
xlator_t *this, int32_t op_ret, int32_t op_errno,
dir_entry_t *entries, int32_t count)
{
STACK_UNWIND (frame, op_ret, op_errno, entries, count);
return 0;
}
int32_t
meta_xlator_view_readdir (call_frame_t *frame,
xlator_t *this,
const char *path)
{
meta_private_t *priv = (meta_private_t *) this->private;
meta_dirent_t *root = priv->tree;
char *op_path = NULL;
meta_dirent_t *dir = lookup_meta_entry (root, path, &op_path);
STACK_WIND (frame, meta_xlator_view_readdir_cbk,
dir->view_xlator, dir->view_xlator->fops->readdir,
op_path ? op_path : "/");
return 0;
}
static int32_t
meta_xlator_view_open_cbk (call_frame_t *frame, void *cookie,
xlator_t *this,
int32_t op_ret, int32_t op_errno,
dict_t *ctx, struct stat *buf)
{
STACK_UNWIND (frame, op_ret, op_errno, ctx, buf);
return 0;
}
int32_t
meta_xlator_view_open (call_frame_t *frame, xlator_t *this,
const char *path, int32_t flags, mode_t mode)
{
meta_private_t *priv = (meta_private_t *) this->private;
meta_dirent_t *root = priv->tree;
char *op_path = NULL;
meta_dirent_t *file = lookup_meta_entry (root, path, &op_path);
STACK_WIND (frame, meta_xlator_view_open_cbk,
file->view_xlator, file->view_xlator->fops->open,
op_path, flags, mode);
return 0;
}
int32_t
meta_xlator_view_create (call_frame_t *frame, xlator_t *this,
const char *path, int32_t flags, mode_t mode)
{
meta_private_t *priv = (meta_private_t *) this->private;
meta_dirent_t *root = priv->tree;
char *op_path = NULL;
meta_dirent_t *file = lookup_meta_entry (root, path, &op_path);
STACK_WIND (frame, meta_xlator_view_open_cbk,
file->view_xlator, file->view_xlator->fops->create,
op_path, flags, mode);
return 0;
}
static int32_t
meta_xlator_view_readv_cbk (call_frame_t *frame, void *cookie,
xlator_t *this, int32_t op_ret,
int32_t op_errno, struct iovec *vector,
int32_t count)
{
STACK_UNWIND (frame, op_ret, op_errno, vector, count);
return 0;
}
int32_t
meta_xlator_view_readv (call_frame_t *frame, xlator_t *this,
dict_t *fd, size_t size, off_t offset)
{
meta_private_t *priv = (meta_private_t *) this->private;
meta_dirent_t *root = priv->tree;
data_t *path_data = dict_get (fd, this->name);
if (path_data) {
const char *path = data_to_str (path_data);
meta_dirent_t *file = lookup_meta_entry (root, path, NULL);
STACK_WIND (frame, meta_xlator_view_readv_cbk,
file->view_xlator, file->view_xlator->fops->readv,
fd, size, offset);
return 0;
}
STACK_UNWIND (frame, -1, EBADFD, NULL, 0);
return 0;
}
static int32_t
meta_xlator_view_writev_cbk (call_frame_t *frame, void *cookie,
xlator_t *this, int32_t op_ret,
int32_t op_errno)
{
STACK_UNWIND (frame, op_ret, op_errno);
return 0;
}
int32_t
meta_xlator_view_writev (call_frame_t *frame, xlator_t *this,
dict_t *fd,
struct iovec *vector, int32_t count, off_t offset)
{
meta_private_t *priv = (meta_private_t *) this->private;
meta_dirent_t *root = priv->tree;
data_t *path_data = dict_get (fd, this->name);
if (path_data) {
const char *path = data_to_str (path_data);
meta_dirent_t *file = lookup_meta_entry (root, path, NULL);
STACK_WIND (frame, meta_xlator_view_writev_cbk,
file->view_xlator, file->view_xlator->fops->writev,
fd, vector, count, offset);
return 0;
}
STACK_UNWIND (frame, -1, EBADFD, NULL, 0);
return 0;
}
struct xlator_fops meta_xlator_view_fops = {
.getattr = meta_xlator_view_getattr,
.readdir = meta_xlator_view_readdir,
.open = meta_xlator_view_open,
.create = meta_xlator_view_create,
.readv = meta_xlator_view_readv,
.writev = meta_xlator_view_writev
};
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