blob: 6192df37f12198cba12c6e1b6e6ce4c7946a9f70 [file] [log] [blame]
/*
* vim:noexpandtab:shiftwidth=8:tabstop=8:
*
* Copyright CEA/DAM/DIF (2011)
* contributeur : Philippe DENIEL philippe.deniel@cea.fr
* Thomas LEIBOVICI thomas.leibovici@cea.fr
*
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* ---------------------------------------
*/
/**
* \file 9p_unlinkat.c
* \brief 9P version
*
* 9p_unlinkat.c : _9P_interpretor, request ATTACH
*
*
*/
#include "config.h"
#include <stdio.h>
#include <string.h>
#include <pthread.h>
#include "nfs_core.h"
#include "nfs_exports.h"
#include "log.h"
#include "fsal.h"
#include "9p.h"
int _9p_unlinkat(struct _9p_request_data *req9p, u32 *plenout, char *preply)
{
char *cursor = req9p->_9pmsg + _9P_HDR_SIZE + _9P_TYPE_SIZE;
u16 *msgtag = NULL;
u32 *dfid = NULL;
u16 *name_len = NULL;
char *name_str = NULL;
/* flags are not used */
__attribute__ ((unused)) u32 *flags = NULL;
struct _9p_fid *pdfid = NULL;
fsal_status_t fsal_status;
char name[MAXNAMLEN+1];
/* Get data */
_9p_getptr(cursor, msgtag, u16);
_9p_getptr(cursor, dfid, u32);
_9p_getstr(cursor, name_len, name_str);
_9p_getptr(cursor, flags, u32);
LogDebug(COMPONENT_9P, "TUNLINKAT: tag=%u dfid=%u name=%.*s",
(u32) *msgtag, *dfid, *name_len, name_str);
if (*dfid >= _9P_FID_PER_CONN)
return _9p_rerror(req9p, msgtag, ERANGE, plenout, preply);
pdfid = req9p->pconn->fids[*dfid];
/* Check that it is a valid fid */
if (pdfid == NULL || pdfid->pentry == NULL) {
LogDebug(COMPONENT_9P, "request on invalid fid=%u", *dfid);
return _9p_rerror(req9p, msgtag, EIO, plenout, preply);
}
_9p_init_opctx(pdfid, req9p);
if ((op_ctx->export_perms->options &
EXPORT_OPTION_WRITE_ACCESS) == 0)
return _9p_rerror(req9p, msgtag, EROFS, plenout, preply);
/* Let's do the job */
if (*name_len >= sizeof(name)) {
LogDebug(COMPONENT_9P, "request with name too long (%u)",
*name_len);
return _9p_rerror(req9p, msgtag, ENAMETOOLONG, plenout,
preply);
}
snprintf(name, sizeof(name), "%.*s", *name_len, name_str);
fsal_status = fsal_remove(pdfid->pentry, name);
if (FSAL_IS_ERROR(fsal_status))
return _9p_rerror(req9p, msgtag,
_9p_tools_errno(fsal_status), plenout,
preply);
/* Build the reply */
_9p_setinitptr(cursor, preply, _9P_RUNLINKAT);
_9p_setptr(cursor, msgtag, u16);
_9p_setendptr(cursor, preply);
_9p_checkbound(cursor, preply, plenout);
LogDebug(COMPONENT_9P, "TUNLINKAT: tag=%u dfid=%u name=%.*s",
(u32) *msgtag, *dfid, *name_len, name_str);
return 1;
}