blob: d7b4aeac72f606d2dbbaf4199b0d4e4e9f1c51ce [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_lcreate.c
* \brief 9P version
*
* 9p_lcreate.c : _9P_interpretor, request LCREATE
*
*
*/
#include "config.h"
#include <stdio.h>
#include <string.h>
#include <pthread.h>
#include <sys/stat.h>
#include "nfs_core.h"
#include "nfs_exports.h"
#include "log.h"
#include "fsal.h"
#include "9p.h"
int _9p_lcreate(struct _9p_request_data *req9p, u32 *plenout, char *preply)
{
char *cursor = req9p->_9pmsg + _9P_HDR_SIZE + _9P_TYPE_SIZE;
u16 *msgtag = NULL;
u32 *fid = NULL;
u32 *flags = NULL;
u32 *mode = NULL;
u32 *gid = NULL;
u16 *name_len = NULL;
char *name_str = NULL;
struct _9p_fid *pfid = NULL;
struct _9p_qid qid_newfile;
u32 iounit = _9P_IOUNIT;
struct fsal_obj_handle *pentry_newfile = NULL;
char file_name[MAXNAMLEN+1];
fsal_status_t fsal_status;
fsal_openflags_t openflags = 0;
/* Get data */
_9p_getptr(cursor, msgtag, u16);
_9p_getptr(cursor, fid, u32);
_9p_getstr(cursor, name_len, name_str);
_9p_getptr(cursor, flags, u32);
_9p_getptr(cursor, mode, u32);
_9p_getptr(cursor, gid, u32);
LogDebug(COMPONENT_9P,
"TLCREATE: tag=%u fid=%u name=%.*s flags=0%o mode=0%o gid=%u",
(u32) *msgtag, *fid, *name_len, name_str, *flags, *mode,
*gid);
if (*fid >= _9P_FID_PER_CONN)
return _9p_rerror(req9p, msgtag, ERANGE, plenout, preply);
pfid = req9p->pconn->fids[*fid];
/* Check that it is a valid fid */
if (pfid == NULL || pfid->pentry == NULL) {
LogDebug(COMPONENT_9P, "request on invalid fid=%u", *fid);
return _9p_rerror(req9p, msgtag, EIO, plenout, preply);
}
_9p_init_opctx(pfid, req9p);
if ((op_ctx->export_perms->options &
EXPORT_OPTION_WRITE_ACCESS) == 0)
return _9p_rerror(req9p, msgtag, EROFS, plenout, preply);
if (*name_len >= sizeof(file_name)) {
LogDebug(COMPONENT_9P, "request with name too long (%u)",
*name_len);
return _9p_rerror(req9p, msgtag, ENAMETOOLONG, plenout,
preply);
}
snprintf(file_name, sizeof(file_name), "%.*s", *name_len, name_str);
_9p_openflags2FSAL(flags, &openflags);
pfid->state->state_data.fid.share_access =
_9p_openflags_to_share_access(flags);
if (pfid->pentry->fsal->m_ops.support_ex(pfid->pentry)) {
struct attrlist sattr;
fsal_verifier_t verifier;
enum fsal_create_mode createmode = FSAL_UNCHECKED;
fsal_prepare_attrs(&sattr, ATTR_MODE | ATTR_GROUP);
memset(&verifier, 0, sizeof(verifier));
sattr.mode = *mode;
sattr.group = *gid;
if (*flags & 0x10) {
/* Filesize is already 0. */
sattr.valid_mask |= ATTR_SIZE;
}
if (*flags & 0x1000) {
/* If OEXCL, use FSAL_EXCLUSIVE_9P create mode
* so that we can pass the attributes specified
* above. Verifier is ignored for this create mode
* because we don't have to deal with retry.
*/
createmode = FSAL_EXCLUSIVE_9P;
}
fsal_status = fsal_open2(pfid->pentry,
pfid->state,
openflags,
createmode,
file_name,
&sattr,
verifier,
&pentry_newfile,
NULL);
/* Release the attributes (may release an inherited ACL) */
fsal_release_attrs(&sattr);
if (FSAL_IS_ERROR(fsal_status))
return _9p_rerror(req9p, msgtag,
_9p_tools_errno(fsal_status),
plenout, preply);
} else {
/* Create the file */
struct attrlist sattr;
fsal_prepare_attrs(&sattr, ATTR_MODE | ATTR_GROUP);
sattr.mode = *mode;
sattr.group = *gid;
/* BUGAZOMEU: @todo : the gid parameter is not used yet,
* flags is not yet used
*/
fsal_status = fsal_create(pfid->pentry, file_name, REGULAR_FILE,
&sattr, NULL, &pentry_newfile, NULL);
/* Release the attributes (may release an inherited ACL) */
fsal_release_attrs(&sattr);
if (FSAL_IS_ERROR(fsal_status))
return _9p_rerror(req9p, msgtag,
_9p_tools_errno(fsal_status),
plenout, preply);
fsal_status = fsal_open(pentry_newfile, openflags);
if (FSAL_IS_ERROR(fsal_status)) {
pentry_newfile->obj_ops.put_ref(pentry_newfile);
return _9p_rerror(req9p, msgtag,
_9p_tools_errno(fsal_status),
plenout, preply);
}
}
/* Get the open ref */
pentry_newfile->obj_ops.get_ref(pentry_newfile);
/* put parent directory entry */
pfid->pentry->obj_ops.put_ref(pfid->pentry);
/* Build the qid */
qid_newfile.type = _9P_QTFILE;
qid_newfile.version = 0;
qid_newfile.path = pentry_newfile->fileid;
iounit = 0; /* default value */
/* The fid will represent the new file now - we can't fail anymore */
pfid->pentry = pentry_newfile;
pfid->qid = qid_newfile;
pfid->specdata.xattr.xattr_id = 0;
pfid->specdata.xattr.xattr_content = NULL;
pfid->opens = 1;
/* Build the reply */
_9p_setinitptr(cursor, preply, _9P_RLCREATE);
_9p_setptr(cursor, msgtag, u16);
_9p_setqid(cursor, qid_newfile);
_9p_setvalue(cursor, iounit, u32);
_9p_setendptr(cursor, preply);
_9p_checkbound(cursor, preply, plenout);
LogDebug(COMPONENT_9P,
"RLCREATE: tag=%u fid=%u name=%.*s qid=(type=%u,version=%u,path=%llu) iounit=%u pentry=%p",
(u32) *msgtag, *fid, *name_len, name_str, qid_newfile.type,
qid_newfile.version, (unsigned long long)qid_newfile.path,
iounit, pfid->pentry);
return 1;
}