[linux-2.6-block.git] / fs / cifs / smb2inode.c

/*
 *   fs/cifs/smb2inode.c
 *
 *   Copyright (C) International Business Machines  Corp., 2002, 2011
 *                 Etersoft, 2012
 *   Author(s): Pavel Shilovsky (pshilovsky@samba.org),
 *              Steve French (sfrench@us.ibm.com)
 *
 *   This library 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 2.1 of the License, or
 *   (at your option) any later version.
 *
 *   This library 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
#include <linux/fs.h>
#include <linux/stat.h>
#include <linux/slab.h>
#include <linux/pagemap.h>
#include <asm/div64.h>
#include "cifsfs.h"
#include "cifspdu.h"
#include "cifsglob.h"
#include "cifsproto.h"
#include "cifs_debug.h"
#include "cifs_fs_sb.h"
#include "cifs_unicode.h"
#include "fscache.h"
#include "smb2glob.h"
#include "smb2pdu.h"
#include "smb2proto.h"

static int
smb2_open_op_close(const unsigned int xid, struct cifs_tcon *tcon,
		   struct cifs_sb_info *cifs_sb, const char *full_path,
		   __u32 desired_access, __u32 create_disposition,
		   __u32 create_options, void *data, int command)
{
	int rc, tmprc = 0;
	__le16 *utf16_path = NULL;
	__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
	struct cifs_open_parms oparms;
	struct cifs_fid fid;
	bool use_cached_root_handle = false;

	if ((strcmp(full_path, "") == 0) && (create_options == 0) &&
	    (desired_access == FILE_READ_ATTRIBUTES) &&
	    (create_disposition == FILE_OPEN) &&
	    (tcon->nohandlecache == false)) {
		rc = open_shroot(xid, tcon, &fid);
		if (rc == 0)
			use_cached_root_handle = true;
	}

	if (use_cached_root_handle == false) {
		utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
		if (!utf16_path)
			return -ENOMEM;

		oparms.tcon = tcon;
		oparms.desired_access = desired_access;
		oparms.disposition = create_disposition;
		oparms.create_options = create_options;
		oparms.fid = &fid;
		oparms.reconnect = false;

		rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
			       NULL);
		if (rc) {
			kfree(utf16_path);
			return rc;
		}
	}

	switch (command) {
	case SMB2_OP_DELETE:
		break;
	case SMB2_OP_QUERY_INFO:
		tmprc = SMB2_query_info(xid, tcon, fid.persistent_fid,
					fid.volatile_fid,
					(struct smb2_file_all_info *)data);
		break;
	case SMB2_OP_MKDIR:
		/*
		 * Directories are created through parameters in the
		 * SMB2_open() call.
		 */
		break;
	case SMB2_OP_RMDIR:
		tmprc = SMB2_rmdir(xid, tcon, fid.persistent_fid,
				   fid.volatile_fid);
		break;
	case SMB2_OP_RENAME:
		tmprc = SMB2_rename(xid, tcon, fid.persistent_fid,
				    fid.volatile_fid, (__le16 *)data);
		break;
	case SMB2_OP_HARDLINK:
		tmprc = SMB2_set_hardlink(xid, tcon, fid.persistent_fid,
					  fid.volatile_fid, (__le16 *)data);
		break;
	case SMB2_OP_SET_EOF:
		tmprc = SMB2_set_eof(xid, tcon, fid.persistent_fid,
				     fid.volatile_fid, current->tgid,
				     (__le64 *)data, false);
		break;
	case SMB2_OP_SET_INFO:
		tmprc = SMB2_set_info(xid, tcon, fid.persistent_fid,
				      fid.volatile_fid,
				      (FILE_BASIC_INFO *)data);
		break;
	default:
		cifs_dbg(VFS, "Invalid command\n");
		break;
	}

	if (use_cached_root_handle)
		close_shroot(&tcon->crfid);
	else
		rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
	if (tmprc)
		rc = tmprc;
	kfree(utf16_path);
	return rc;
}

void
move_smb2_info_to_cifs(FILE_ALL_INFO *dst, struct smb2_file_all_info *src)
{
	memcpy(dst, src, (size_t)(&src->CurrentByteOffset) - (size_t)src);
	dst->CurrentByteOffset = src->CurrentByteOffset;
	dst->Mode = src->Mode;
	dst->AlignmentRequirement = src->AlignmentRequirement;
	dst->IndexNumber1 = 0; /* we don't use it */
}

int
smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
		     struct cifs_sb_info *cifs_sb, const char *full_path,
		     FILE_ALL_INFO *data, bool *adjust_tz, bool *symlink)
{
	int rc;
	struct smb2_file_all_info *smb2_data;

	*adjust_tz = false;
	*symlink = false;

	smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
			    GFP_KERNEL);
	if (smb2_data == NULL)
		return -ENOMEM;

	rc = smb2_open_op_close(xid, tcon, cifs_sb, full_path,
				FILE_READ_ATTRIBUTES, FILE_OPEN, 0,
				smb2_data, SMB2_OP_QUERY_INFO);
	if (rc == -EOPNOTSUPP) {
		*symlink = true;
		/* Failed on a symbolic link - query a reparse point info */
		rc = smb2_open_op_close(xid, tcon, cifs_sb, full_path,
					FILE_READ_ATTRIBUTES, FILE_OPEN,
					OPEN_REPARSE_POINT, smb2_data,
					SMB2_OP_QUERY_INFO);
	}
	if (rc)
		goto out;

	move_smb2_info_to_cifs(data, smb2_data);
out:
	kfree(smb2_data);
	return rc;
}

int
smb2_mkdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
	   struct cifs_sb_info *cifs_sb)
{
	return smb2_open_op_close(xid, tcon, cifs_sb, name,
				  FILE_WRITE_ATTRIBUTES, FILE_CREATE,
				  CREATE_NOT_FILE, NULL, SMB2_OP_MKDIR);
}

void
smb2_mkdir_setinfo(struct inode *inode, const char *name,
		   struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon,
		   const unsigned int xid)
{
	FILE_BASIC_INFO data;
	struct cifsInodeInfo *cifs_i;
	u32 dosattrs;
	int tmprc;

	memset(&data, 0, sizeof(data));
	cifs_i = CIFS_I(inode);
	dosattrs = cifs_i->cifsAttrs | ATTR_READONLY;
	data.Attributes = cpu_to_le32(dosattrs);
	tmprc = smb2_open_op_close(xid, tcon, cifs_sb, name,
				   FILE_WRITE_ATTRIBUTES, FILE_CREATE,
				   CREATE_NOT_FILE, &data, SMB2_OP_SET_INFO);
	if (tmprc == 0)
		cifs_i->cifsAttrs = dosattrs;
}

int
smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
	   struct cifs_sb_info *cifs_sb)
{
	return smb2_open_op_close(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
				  CREATE_NOT_FILE,
				  NULL, SMB2_OP_RMDIR);
}

int
smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
	    struct cifs_sb_info *cifs_sb)
{
	return smb2_open_op_close(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
				  CREATE_DELETE_ON_CLOSE | OPEN_REPARSE_POINT,
				  NULL, SMB2_OP_DELETE);
}

static int
smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon,
		   const char *from_name, const char *to_name,
		   struct cifs_sb_info *cifs_sb, __u32 access, int command)
{
	__le16 *smb2_to_name = NULL;
	int rc;

	smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb);
	if (smb2_to_name == NULL) {
		rc = -ENOMEM;
		goto smb2_rename_path;
	}

	rc = smb2_open_op_close(xid, tcon, cifs_sb, from_name, access,
				FILE_OPEN, 0, smb2_to_name, command);
smb2_rename_path:
	kfree(smb2_to_name);
	return rc;
}

int
smb2_rename_path(const unsigned int xid, struct cifs_tcon *tcon,
		 const char *from_name, const char *to_name,
		 struct cifs_sb_info *cifs_sb)
{
	return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
				  DELETE, SMB2_OP_RENAME);
}

int
smb2_create_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
		     const char *from_name, const char *to_name,
		     struct cifs_sb_info *cifs_sb)
{
	return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
				  FILE_READ_ATTRIBUTES, SMB2_OP_HARDLINK);
}

int
smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon,
		   const char *full_path, __u64 size,
		   struct cifs_sb_info *cifs_sb, bool set_alloc)
{
	__le64 eof = cpu_to_le64(size);
	return smb2_open_op_close(xid, tcon, cifs_sb, full_path,
				  FILE_WRITE_DATA, FILE_OPEN, 0, &eof,
				  SMB2_OP_SET_EOF);
}

int
smb2_set_file_info(struct inode *inode, const char *full_path,
		   FILE_BASIC_INFO *buf, const unsigned int xid)
{
	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
	struct tcon_link *tlink;
	int rc;

	if ((buf->CreationTime == 0) && (buf->LastAccessTime == 0) &&
	    (buf->LastWriteTime == 0) && (buf->ChangeTime == 0) &&
	    (buf->Attributes == 0))
		return 0; /* would be a no op, no sense sending this */

	tlink = cifs_sb_tlink(cifs_sb);
	if (IS_ERR(tlink))
		return PTR_ERR(tlink);

	rc = smb2_open_op_close(xid, tlink_tcon(tlink), cifs_sb, full_path,
				FILE_WRITE_ATTRIBUTES, FILE_OPEN, 0, buf,
				SMB2_OP_SET_INFO);
	cifs_put_tlink(tlink);
	return rc;
}
Commit	Line	Data
be4cb9e3 PS	1	/*
	2	* fs/cifs/smb2inode.c
	3	*
	4	* Copyright (C) International Business Machines Corp., 2002, 2011
	5	* Etersoft, 2012
	6	* Author(s): Pavel Shilovsky (pshilovsky@samba.org),
	7	* Steve French (sfrench@us.ibm.com)
	8	*
	9	* This library is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU Lesser General Public License as published
	11	* by the Free Software Foundation; either version 2.1 of the License, or
	12	* (at your option) any later version.
	13	*
	14	* This library is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
	17	* the GNU Lesser General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU Lesser General Public License
	20	* along with this library; if not, write to the Free Software
	21	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	22	*/
	23	#include <linux/fs.h>
	24	#include <linux/stat.h>
	25	#include <linux/slab.h>
	26	#include <linux/pagemap.h>
	27	#include <asm/div64.h>
	28	#include "cifsfs.h"
	29	#include "cifspdu.h"
	30	#include "cifsglob.h"
	31	#include "cifsproto.h"
	32	#include "cifs_debug.h"
	33	#include "cifs_fs_sb.h"
	34	#include "cifs_unicode.h"
	35	#include "fscache.h"
	36	#include "smb2glob.h"
	37	#include "smb2pdu.h"
	38	#include "smb2proto.h"
	39
	40	static int
	41	smb2_open_op_close(const unsigned int xid, struct cifs_tcon *tcon,
	42	struct cifs_sb_info cifs_sb, const char full_path,
	43	__u32 desired_access, __u32 create_disposition,
ca81983f	44	__u32 create_options, void *data, int command)
be4cb9e3 PS	45	{
be4cb9e3 PS	46	int rc, tmprc = 0;
3d4ef9a1	47	__le16 *utf16_path = NULL;
2e44b288	48	__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
064f6047 PS	49	struct cifs_open_parms oparms;
064f6047 PS	50	struct cifs_fid fid;
3d4ef9a1	51	bool use_cached_root_handle = false;
be4cb9e3	52
3d4ef9a1 SF	53	if ((strcmp(full_path, "") == 0) && (create_options == 0) &&
	54	(desired_access == FILE_READ_ATTRIBUTES) &&
	55	(create_disposition == FILE_OPEN) &&
	56	(tcon->nohandlecache == false)) {
	57	rc = open_shroot(xid, tcon, &fid);
	58	if (rc == 0)
	59	use_cached_root_handle = true;
	60	}
	61
	62	if (use_cached_root_handle == false) {
	63	utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
	64	if (!utf16_path)
	65	return -ENOMEM;
be4cb9e3	66
3d4ef9a1 SF	67	oparms.tcon = tcon;
	68	oparms.desired_access = desired_access;
	69	oparms.disposition = create_disposition;
	70	oparms.create_options = create_options;
	71	oparms.fid = &fid;
	72	oparms.reconnect = false;
064f6047	73
9d874c36 RS	74	rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
9d874c36 RS	75	NULL);
3d4ef9a1 SF	76	if (rc) {
	77	kfree(utf16_path);
	78	return rc;
	79	}
be4cb9e3 PS	80	}
	81
	82	switch (command) {
	83	case SMB2_OP_DELETE:
	84	break;
	85	case SMB2_OP_QUERY_INFO:
064f6047 PS	86	tmprc = SMB2_query_info(xid, tcon, fid.persistent_fid,
064f6047 PS	87	fid.volatile_fid,
be4cb9e3 PS	88	(struct smb2_file_all_info *)data);
	89	break;
	90	case SMB2_OP_MKDIR:
	91	/*
	92	* Directories are created through parameters in the
	93	* SMB2_open() call.
	94	*/
	95	break;
897fba11 SF	96	case SMB2_OP_RMDIR:
	97	tmprc = SMB2_rmdir(xid, tcon, fid.persistent_fid,
	98	fid.volatile_fid);
	99	break;
35143eb5	100	case SMB2_OP_RENAME:
064f6047 PS	101	tmprc = SMB2_rename(xid, tcon, fid.persistent_fid,
064f6047 PS	102	fid.volatile_fid, (__le16 *)data);
35143eb5	103	break;
568798cc	104	case SMB2_OP_HARDLINK:
064f6047 PS	105	tmprc = SMB2_set_hardlink(xid, tcon, fid.persistent_fid,
064f6047 PS	106	fid.volatile_fid, (__le16 *)data);
568798cc	107	break;
c839ff24	108	case SMB2_OP_SET_EOF:
064f6047 PS	109	tmprc = SMB2_set_eof(xid, tcon, fid.persistent_fid,
064f6047 PS	110	fid.volatile_fid, current->tgid,
f29ebb47	111	(__le64 *)data, false);
c839ff24	112	break;
1feeaac7	113	case SMB2_OP_SET_INFO:
064f6047 PS	114	tmprc = SMB2_set_info(xid, tcon, fid.persistent_fid,
064f6047 PS	115	fid.volatile_fid,
1feeaac7 PS	116	(FILE_BASIC_INFO *)data);
1feeaac7 PS	117	break;
be4cb9e3	118	default:
f96637be	119	cifs_dbg(VFS, "Invalid command\n");
be4cb9e3 PS	120	break;
	121	}
	122
9da6ec77 RS	123	if (use_cached_root_handle)
	124	close_shroot(&tcon->crfid);
	125	else
3d4ef9a1	126	rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
be4cb9e3 PS	127	if (tmprc)
	128	rc = tmprc;
	129	kfree(utf16_path);
	130	return rc;
	131	}
	132
f0df737e	133	void
be4cb9e3 PS	134	move_smb2_info_to_cifs(FILE_ALL_INFO dst, struct smb2_file_all_info src)
	135	{
	136	memcpy(dst, src, (size_t)(&src->CurrentByteOffset) - (size_t)src);
	137	dst->CurrentByteOffset = src->CurrentByteOffset;
	138	dst->Mode = src->Mode;
	139	dst->AlignmentRequirement = src->AlignmentRequirement;
	140	dst->IndexNumber1 = 0; /* we don't use it */
	141	}
	142
	143	int
	144	smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
	145	struct cifs_sb_info cifs_sb, const char full_path,
eb85d94b	146	FILE_ALL_INFO data, bool adjust_tz, bool *symlink)
be4cb9e3 PS	147	{
	148	int rc;
	149	struct smb2_file_all_info *smb2_data;
	150
	151	*adjust_tz = false;
eb85d94b	152	*symlink = false;
be4cb9e3	153
1bbe4997	154	smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
be4cb9e3 PS	155	GFP_KERNEL);
	156	if (smb2_data == NULL)
	157	return -ENOMEM;
	158
	159	rc = smb2_open_op_close(xid, tcon, cifs_sb, full_path,
eb85d94b PS	160	FILE_READ_ATTRIBUTES, FILE_OPEN, 0,
	161	smb2_data, SMB2_OP_QUERY_INFO);
	162	if (rc == -EOPNOTSUPP) {
	163	*symlink = true;
	164	/* Failed on a symbolic link - query a reparse point info */
	165	rc = smb2_open_op_close(xid, tcon, cifs_sb, full_path,
	166	FILE_READ_ATTRIBUTES, FILE_OPEN,
	167	OPEN_REPARSE_POINT, smb2_data,
	168	SMB2_OP_QUERY_INFO);
	169	}
be4cb9e3 PS	170	if (rc)
	171	goto out;
	172
	173	move_smb2_info_to_cifs(data, smb2_data);
	174	out:
	175	kfree(smb2_data);
	176	return rc;
	177	}
a0e73183 PS	178
	179	int
	180	smb2_mkdir(const unsigned int xid, struct cifs_tcon tcon, const char name,
	181	struct cifs_sb_info *cifs_sb)
	182	{
	183	return smb2_open_op_close(xid, tcon, cifs_sb, name,
ca81983f	184	FILE_WRITE_ATTRIBUTES, FILE_CREATE,
a0e73183 PS	185	CREATE_NOT_FILE, NULL, SMB2_OP_MKDIR);
	186	}
	187
	188	void
	189	smb2_mkdir_setinfo(struct inode inode, const char name,
	190	struct cifs_sb_info cifs_sb, struct cifs_tcon tcon,
	191	const unsigned int xid)
	192	{
	193	FILE_BASIC_INFO data;
	194	struct cifsInodeInfo *cifs_i;
	195	u32 dosattrs;
	196	int tmprc;
	197
	198	memset(&data, 0, sizeof(data));
	199	cifs_i = CIFS_I(inode);
	200	dosattrs = cifs_i->cifsAttrs \| ATTR_READONLY;
	201	data.Attributes = cpu_to_le32(dosattrs);
	202	tmprc = smb2_open_op_close(xid, tcon, cifs_sb, name,
ca81983f	203	FILE_WRITE_ATTRIBUTES, FILE_CREATE,
a0e73183 PS	204	CREATE_NOT_FILE, &data, SMB2_OP_SET_INFO);
	205	if (tmprc == 0)
	206	cifs_i->cifsAttrs = dosattrs;
	207	}
1a500f01 PS	208
	209	int
	210	smb2_rmdir(const unsigned int xid, struct cifs_tcon tcon, const char name,
	211	struct cifs_sb_info *cifs_sb)
	212	{
	213	return smb2_open_op_close(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
897fba11 SF	214	CREATE_NOT_FILE,
897fba11 SF	215	NULL, SMB2_OP_RMDIR);
1a500f01	216	}
cbe6f439 PS	217
	218	int
	219	smb2_unlink(const unsigned int xid, struct cifs_tcon tcon, const char name,
	220	struct cifs_sb_info *cifs_sb)
	221	{
	222	return smb2_open_op_close(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
b42bf888 PS	223	CREATE_DELETE_ON_CLOSE \| OPEN_REPARSE_POINT,
b42bf888 PS	224	NULL, SMB2_OP_DELETE);
cbe6f439	225	}
35143eb5	226
568798cc PS	227	static int
	228	smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon,
	229	const char from_name, const char to_name,
	230	struct cifs_sb_info *cifs_sb, __u32 access, int command)
35143eb5 PS	231	{
	232	__le16 *smb2_to_name = NULL;
	233	int rc;
	234
	235	smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb);
	236	if (smb2_to_name == NULL) {
	237	rc = -ENOMEM;
	238	goto smb2_rename_path;
	239	}
	240
568798cc	241	rc = smb2_open_op_close(xid, tcon, cifs_sb, from_name, access,
ca81983f	242	FILE_OPEN, 0, smb2_to_name, command);
35143eb5 PS	243	smb2_rename_path:
	244	kfree(smb2_to_name);
	245	return rc;
	246	}
568798cc PS	247
	248	int
	249	smb2_rename_path(const unsigned int xid, struct cifs_tcon *tcon,
	250	const char from_name, const char to_name,
	251	struct cifs_sb_info *cifs_sb)
	252	{
	253	return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
	254	DELETE, SMB2_OP_RENAME);
	255	}
	256
	257	int
	258	smb2_create_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
	259	const char from_name, const char to_name,
	260	struct cifs_sb_info *cifs_sb)
	261	{
	262	return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
	263	FILE_READ_ATTRIBUTES, SMB2_OP_HARDLINK);
	264	}
c839ff24 PS	265
	266	int
	267	smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon,
	268	const char *full_path, __u64 size,
	269	struct cifs_sb_info *cifs_sb, bool set_alloc)
	270	{
	271	__le64 eof = cpu_to_le64(size);
	272	return smb2_open_op_close(xid, tcon, cifs_sb, full_path,
ca81983f	273	FILE_WRITE_DATA, FILE_OPEN, 0, &eof,
c839ff24 PS	274	SMB2_OP_SET_EOF);
c839ff24 PS	275	}
1feeaac7 PS	276
	277	int
	278	smb2_set_file_info(struct inode inode, const char full_path,
	279	FILE_BASIC_INFO *buf, const unsigned int xid)
	280	{
	281	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
	282	struct tcon_link *tlink;
	283	int rc;
	284
18dd8e1a	285	if ((buf->CreationTime == 0) && (buf->LastAccessTime == 0) &&
fd09b7d3	286	(buf->LastWriteTime == 0) && (buf->ChangeTime == 0) &&
18dd8e1a SF	287	(buf->Attributes == 0))
	288	return 0; /* would be a no op, no sense sending this */
	289
1feeaac7 PS	290	tlink = cifs_sb_tlink(cifs_sb);
	291	if (IS_ERR(tlink))
	292	return PTR_ERR(tlink);
18dd8e1a	293
1feeaac7	294	rc = smb2_open_op_close(xid, tlink_tcon(tlink), cifs_sb, full_path,
ca81983f	295	FILE_WRITE_ATTRIBUTES, FILE_OPEN, 0, buf,
1feeaac7 PS	296	SMB2_OP_SET_INFO);
	297	cifs_put_tlink(tlink);
	298	return rc;
	299	}