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/******************************************************
Copyright (c) 2011 Percona Ireland Ltd.
Local datasink implementation for XtraBackup.
This program 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; version 2 of the License.
This program 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, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*******************************************************/
#include <mysql_version.h>
#include <my_base.h>
#include <mysys_err.h>
#include "common.h"
#include "datasink.h"
typedef struct {
File fd;
} ds_local_file_t;
static ds_ctxt_t *local_init(const char *root);
static ds_file_t *local_open(ds_ctxt_t *ctxt, const char *path,
MY_STAT *mystat);
static int local_write(ds_file_t *file, const void *buf, size_t len);
static int local_close(ds_file_t *file);
static void local_deinit(ds_ctxt_t *ctxt);
datasink_t datasink_local = {
&local_init,
&local_open,
&local_write,
&local_close,
&local_deinit
};
static
ds_ctxt_t *
local_init(const char *root)
{
ds_ctxt_t *ctxt;
if (my_mkdir(root, 0777, MYF(0)) < 0 && my_errno != EEXIST)
{
my_error(EE_CANT_MKDIR, MYF(ME_BELL | ME_WAITTANG),
root, my_errno);
return NULL;
}
ctxt = my_malloc(sizeof(ds_ctxt_t), MYF(MY_FAE));
ctxt->root = my_strdup(root, MYF(MY_FAE));
return ctxt;
}
static
ds_file_t *
local_open(ds_ctxt_t *ctxt, const char *path,
MY_STAT *mystat __attribute__((unused)))
{
char fullpath[FN_REFLEN];
char dirpath[FN_REFLEN];
size_t dirpath_len;
size_t path_len;
ds_local_file_t *local_file;
ds_file_t *file;
File fd;
fn_format(fullpath, path, ctxt->root, "", MYF(MY_RELATIVE_PATH));
/* Create the directory if needed */
dirname_part(dirpath, fullpath, &dirpath_len);
if (my_mkdir(dirpath, 0777, MYF(0)) < 0 && my_errno != EEXIST) {
my_error(EE_CANT_MKDIR, MYF(ME_BELL | ME_WAITTANG),
dirpath, my_errno);
return NULL;
}
fd = my_create(fullpath, 0, O_WRONLY | O_BINARY | O_EXCL | O_NOFOLLOW,
MYF(MY_WME));
if (fd < 0) {
return NULL;
}
path_len = strlen(fullpath) + 1; /* terminating '\0' */
file = (ds_file_t *) my_malloc(sizeof(ds_file_t) +
sizeof(ds_local_file_t) +
path_len,
MYF(MY_FAE));
local_file = (ds_local_file_t *) (file + 1);
local_file->fd = fd;
file->path = (char *) local_file + sizeof(ds_local_file_t);
memcpy(file->path, fullpath, path_len);
file->ptr = local_file;
return file;
}
static
int
local_write(ds_file_t *file, const void *buf, size_t len)
{
File fd = ((ds_local_file_t *) file->ptr)->fd;
if (!my_write(fd, buf, len, MYF(MY_WME | MY_NABP))) {
posix_fadvise(fd, 0, 0, POSIX_FADV_DONTNEED);
return 0;
}
return 1;
}
static
int
local_close(ds_file_t *file)
{
File fd = ((ds_local_file_t *) file->ptr)->fd;
MY_FREE(file);
my_sync(fd, MYF(MY_WME));
return my_close(fd, MYF(MY_WME));
}
static
void
local_deinit(ds_ctxt_t *ctxt)
{
MY_FREE(ctxt->root);
MY_FREE(ctxt);
}
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