[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_compound_op(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 *ptr, int command)
{
	int rc;
	__le16 *utf16_path = NULL;
	__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
	struct cifs_open_parms oparms;
	struct cifs_fid fid;
	struct cifs_ses *ses = tcon->ses;
	int num_rqst = 0;
	struct smb_rqst rqst[3];
	int resp_buftype[3];
	struct kvec rsp_iov[3];
	struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
	struct kvec qi_iov[1];
	struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
	struct kvec close_iov[1];
	struct smb2_query_info_rsp *qi_rsp = NULL;
	int flags = 0;
	__u8 delete_pending[8] = {1, 0, 0, 0, 0, 0, 0, 0};
	unsigned int size[2];
	void *data[2];
	struct smb2_file_rename_info rename_info;
	struct smb2_file_link_info link_info;
	int len;

	if (smb3_encryption_required(tcon))
		flags |= CIFS_TRANSFORM_REQ;

	memset(rqst, 0, sizeof(rqst));
	resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
	memset(rsp_iov, 0, sizeof(rsp_iov));

	/* Open */
	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;
	if (backup_cred(cifs_sb))
		oparms.create_options |= CREATE_OPEN_BACKUP_INTENT;
	oparms.fid = &fid;
	oparms.reconnect = false;

	memset(&open_iov, 0, sizeof(open_iov));
	rqst[num_rqst].rq_iov = open_iov;
	rqst[num_rqst].rq_nvec = SMB2_CREATE_IOV_SIZE;
	rc = SMB2_open_init(tcon, &rqst[num_rqst], &oplock, &oparms,
			    utf16_path);
	kfree(utf16_path);
	if (rc)
		goto finished;

	smb2_set_next_command(tcon, &rqst[num_rqst++]);

	/* Operation */
	switch (command) {
	case SMB2_OP_QUERY_INFO:
		memset(&qi_iov, 0, sizeof(qi_iov));
		rqst[num_rqst].rq_iov = qi_iov;
		rqst[num_rqst].rq_nvec = 1;

		rc = SMB2_query_info_init(tcon, &rqst[num_rqst], COMPOUND_FID,
				COMPOUND_FID, FILE_ALL_INFORMATION,
				SMB2_O_INFO_FILE, 0,
				sizeof(struct smb2_file_all_info) +
					  PATH_MAX * 2, 0, NULL);
		smb2_set_next_command(tcon, &rqst[num_rqst]);
		smb2_set_related(&rqst[num_rqst++]);
		break;
	case SMB2_OP_DELETE:
		break;
	case SMB2_OP_MKDIR:
		/*
		 * Directories are created through parameters in the
		 * SMB2_open() call.
		 */
		break;
	case SMB2_OP_RMDIR:
		memset(&si_iov, 0, sizeof(si_iov));
		rqst[num_rqst].rq_iov = si_iov;
		rqst[num_rqst].rq_nvec = 1;

		size[0] = 1; /* sizeof __u8 See MS-FSCC section 2.4.11 */
		data[0] = &delete_pending[0];

		rc = SMB2_set_info_init(tcon, &rqst[num_rqst], COMPOUND_FID,
					COMPOUND_FID, current->tgid,
					FILE_DISPOSITION_INFORMATION,
					SMB2_O_INFO_FILE, 0, data, size);
		smb2_set_next_command(tcon, &rqst[num_rqst]);
		smb2_set_related(&rqst[num_rqst++]);
		break;
	case SMB2_OP_SET_EOF:
		memset(&si_iov, 0, sizeof(si_iov));
		rqst[num_rqst].rq_iov = si_iov;
		rqst[num_rqst].rq_nvec = 1;

		size[0] = 8; /* sizeof __le64 */
		data[0] = ptr;

		rc = SMB2_set_info_init(tcon, &rqst[num_rqst], COMPOUND_FID,
					COMPOUND_FID, current->tgid,
					FILE_END_OF_FILE_INFORMATION,
					SMB2_O_INFO_FILE, 0, data, size);
		smb2_set_next_command(tcon, &rqst[num_rqst]);
		smb2_set_related(&rqst[num_rqst++]);
		break;
	case SMB2_OP_SET_INFO:
		memset(&si_iov, 0, sizeof(si_iov));
		rqst[num_rqst].rq_iov = si_iov;
		rqst[num_rqst].rq_nvec = 1;


		size[0] = sizeof(FILE_BASIC_INFO);
		data[0] = ptr;

		rc = SMB2_set_info_init(tcon, &rqst[num_rqst], COMPOUND_FID,
					COMPOUND_FID, current->tgid,
					FILE_BASIC_INFORMATION,
					SMB2_O_INFO_FILE, 0, data, size);
		smb2_set_next_command(tcon, &rqst[num_rqst]);
		smb2_set_related(&rqst[num_rqst++]);
		break;
	case SMB2_OP_RENAME:
		memset(&si_iov, 0, sizeof(si_iov));
		rqst[num_rqst].rq_iov = si_iov;
		rqst[num_rqst].rq_nvec = 2;

		len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX));

		rename_info.ReplaceIfExists = 1;
		rename_info.RootDirectory = 0;
		rename_info.FileNameLength = cpu_to_le32(len);

		size[0] = sizeof(struct smb2_file_rename_info);
		data[0] = &rename_info;

		size[1] = len + 2 /* null */;
		data[1] = (__le16 *)ptr;

		rc = SMB2_set_info_init(tcon, &rqst[num_rqst], COMPOUND_FID,
					COMPOUND_FID, current->tgid,
					FILE_RENAME_INFORMATION,
					SMB2_O_INFO_FILE, 0, data, size);
		smb2_set_next_command(tcon, &rqst[num_rqst]);
		smb2_set_related(&rqst[num_rqst++]);
		break;
	case SMB2_OP_HARDLINK:
		memset(&si_iov, 0, sizeof(si_iov));
		rqst[num_rqst].rq_iov = si_iov;
		rqst[num_rqst].rq_nvec = 2;

		len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX));

		link_info.ReplaceIfExists = 0;
		link_info.RootDirectory = 0;
		link_info.FileNameLength = cpu_to_le32(len);

		size[0] = sizeof(struct smb2_file_link_info);
		data[0] = &link_info;

		size[1] = len + 2 /* null */;
		data[1] = (__le16 *)ptr;

		rc = SMB2_set_info_init(tcon, &rqst[num_rqst], COMPOUND_FID,
					COMPOUND_FID, current->tgid,
					FILE_LINK_INFORMATION,
					SMB2_O_INFO_FILE, 0, data, size);
		smb2_set_next_command(tcon, &rqst[num_rqst]);
		smb2_set_related(&rqst[num_rqst++]);
		break;
	default:
		cifs_dbg(VFS, "Invalid command\n");
		rc = -EINVAL;
	}
	if (rc)
		goto finished;

	/* Close */
	memset(&close_iov, 0, sizeof(close_iov));
	rqst[num_rqst].rq_iov = close_iov;
	rqst[num_rqst].rq_nvec = 1;
	rc = SMB2_close_init(tcon, &rqst[num_rqst], COMPOUND_FID,
			     COMPOUND_FID);
	smb2_set_related(&rqst[num_rqst++]);
	if (rc)
		goto finished;

	rc = compound_send_recv(xid, ses, flags, num_rqst, rqst,
				resp_buftype, rsp_iov);

 finished:
	SMB2_open_free(&rqst[0]);
	switch (command) {
	case SMB2_OP_QUERY_INFO:
		if (rc == 0) {
			qi_rsp = (struct smb2_query_info_rsp *)
				rsp_iov[1].iov_base;
			rc = smb2_validate_and_copy_iov(
				le16_to_cpu(qi_rsp->OutputBufferOffset),
				le32_to_cpu(qi_rsp->OutputBufferLength),
				&rsp_iov[1], sizeof(struct smb2_file_all_info),
				ptr);
		}
		if (rqst[1].rq_iov)
			SMB2_query_info_free(&rqst[1]);
		if (rqst[2].rq_iov)
			SMB2_close_free(&rqst[2]);
		break;
	case SMB2_OP_DELETE:
	case SMB2_OP_MKDIR:
		if (rqst[1].rq_iov)
			SMB2_close_free(&rqst[1]);
		break;
	case SMB2_OP_HARDLINK:
	case SMB2_OP_RENAME:
	case SMB2_OP_RMDIR:
	case SMB2_OP_SET_EOF:
	case SMB2_OP_SET_INFO:
		if (rqst[1].rq_iov)
			SMB2_set_info_free(&rqst[1]);
		if (rqst[2].rq_iov)
			SMB2_close_free(&rqst[2]);
		break;
	}
	free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
	free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
	free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
	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;
	__u32 create_options = 0;
	struct cifs_fid fid;
	bool no_cached_open = tcon->nohandlecache;

	*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;

	/* If it is a root and its handle is cached then use it */
	if (!strlen(full_path) && !no_cached_open) {
		rc = open_shroot(xid, tcon, &fid);
		if (rc)
			goto out;

		if (tcon->crfid.file_all_info_is_valid) {
			move_smb2_info_to_cifs(data,
					       &tcon->crfid.file_all_info);
		} else {
			rc = SMB2_query_info(xid, tcon, fid.persistent_fid,
					     fid.volatile_fid, smb2_data);
			if (!rc)
				move_smb2_info_to_cifs(data, smb2_data);
		}
		close_shroot(&tcon->crfid);
		goto out;
	}

	if (backup_cred(cifs_sb))
		create_options |= CREATE_OPEN_BACKUP_INTENT;

	rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
			      FILE_READ_ATTRIBUTES, FILE_OPEN, create_options,
			      smb2_data, SMB2_OP_QUERY_INFO);
	if (rc == -EOPNOTSUPP) {
		*symlink = true;
		create_options |= OPEN_REPARSE_POINT;

		/* Failed on a symbolic link - query a reparse point info */
		rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
				      FILE_READ_ATTRIBUTES, FILE_OPEN,
				      create_options, 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_compound_op(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_compound_op(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_compound_op(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_compound_op(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_compound_op(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_compound_op(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_compound_op(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
c5a5f38f RS	40	static int
	41	smb2_compound_op(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,
c2e0fe3f	44	__u32 create_options, void *ptr, int command)
c5a5f38f RS	45	{
	46	int rc;
	47	__le16 *utf16_path = NULL;
	48	__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
	49	struct cifs_open_parms oparms;
	50	struct cifs_fid fid;
	51	struct cifs_ses *ses = tcon->ses;
c5a5f38f RS	52	int num_rqst = 0;
	53	struct smb_rqst rqst[3];
	54	int resp_buftype[3];
	55	struct kvec rsp_iov[3];
	56	struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
	57	struct kvec qi_iov[1];
14e562ad	58	struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
c5a5f38f	59	struct kvec close_iov[1];
c2e0fe3f	60	struct smb2_query_info_rsp *qi_rsp = NULL;
c5a5f38f	61	int flags = 0;
c2e0fe3f	62	__u8 delete_pending[8] = {1, 0, 0, 0, 0, 0, 0, 0};
bb435512 RS	63	unsigned int size[2];
	64	void *data[2];
	65	struct smb2_file_rename_info rename_info;
	66	struct smb2_file_link_info link_info;
	67	int len;
c5a5f38f RS	68
	69	if (smb3_encryption_required(tcon))
	70	flags \|= CIFS_TRANSFORM_REQ;
	71
	72	memset(rqst, 0, sizeof(rqst));
	73	resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
	74	memset(rsp_iov, 0, sizeof(rsp_iov));
	75
	76	/* Open */
	77	utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
	78	if (!utf16_path)
	79	return -ENOMEM;
	80
	81	oparms.tcon = tcon;
	82	oparms.desired_access = desired_access;
	83	oparms.disposition = create_disposition;
	84	oparms.create_options = create_options;
4d5bdf28 SF	85	if (backup_cred(cifs_sb))
4d5bdf28 SF	86	oparms.create_options \|= CREATE_OPEN_BACKUP_INTENT;
c5a5f38f RS	87	oparms.fid = &fid;
	88	oparms.reconnect = false;
	89
	90	memset(&open_iov, 0, sizeof(open_iov));
	91	rqst[num_rqst].rq_iov = open_iov;
	92	rqst[num_rqst].rq_nvec = SMB2_CREATE_IOV_SIZE;
	93	rc = SMB2_open_init(tcon, &rqst[num_rqst], &oplock, &oparms,
	94	utf16_path);
	95	kfree(utf16_path);
	96	if (rc)
	97	goto finished;
	98
e77fe73c	99	smb2_set_next_command(tcon, &rqst[num_rqst++]);
c5a5f38f RS	100
	101	/* Operation */
	102	switch (command) {
	103	case SMB2_OP_QUERY_INFO:
	104	memset(&qi_iov, 0, sizeof(qi_iov));
	105	rqst[num_rqst].rq_iov = qi_iov;
	106	rqst[num_rqst].rq_nvec = 1;
	107
	108	rc = SMB2_query_info_init(tcon, &rqst[num_rqst], COMPOUND_FID,
	109	COMPOUND_FID, FILE_ALL_INFORMATION,
	110	SMB2_O_INFO_FILE, 0,
	111	sizeof(struct smb2_file_all_info) +
f5b05d62	112	PATH_MAX * 2, 0, NULL);
e77fe73c	113	smb2_set_next_command(tcon, &rqst[num_rqst]);
c5a5f38f RS	114	smb2_set_related(&rqst[num_rqst++]);
c5a5f38f RS	115	break;
47dd9597 RS	116	case SMB2_OP_DELETE:
47dd9597 RS	117	break;
f733e393 RS	118	case SMB2_OP_MKDIR:
	119	/*
	120	* Directories are created through parameters in the
	121	* SMB2_open() call.
	122	*/
	123	break;
c2e0fe3f RS	124	case SMB2_OP_RMDIR:
	125	memset(&si_iov, 0, sizeof(si_iov));
	126	rqst[num_rqst].rq_iov = si_iov;
	127	rqst[num_rqst].rq_nvec = 1;
	128
271b9c0c	129	size[0] = 1; /* sizeof __u8 See MS-FSCC section 2.4.11 */
c2e0fe3f RS	130	data[0] = &delete_pending[0];
	131
	132	rc = SMB2_set_info_init(tcon, &rqst[num_rqst], COMPOUND_FID,
	133	COMPOUND_FID, current->tgid,
	134	FILE_DISPOSITION_INFORMATION,
	135	SMB2_O_INFO_FILE, 0, data, size);
e77fe73c	136	smb2_set_next_command(tcon, &rqst[num_rqst]);
c2e0fe3f RS	137	smb2_set_related(&rqst[num_rqst++]);
c2e0fe3f RS	138	break;
f7bfe04b RS	139	case SMB2_OP_SET_EOF:
	140	memset(&si_iov, 0, sizeof(si_iov));
	141	rqst[num_rqst].rq_iov = si_iov;
	142	rqst[num_rqst].rq_nvec = 1;
	143
	144	size[0] = 8; /* sizeof __le64 */
	145	data[0] = ptr;
	146
	147	rc = SMB2_set_info_init(tcon, &rqst[num_rqst], COMPOUND_FID,
	148	COMPOUND_FID, current->tgid,
	149	FILE_END_OF_FILE_INFORMATION,
	150	SMB2_O_INFO_FILE, 0, data, size);
e77fe73c	151	smb2_set_next_command(tcon, &rqst[num_rqst]);
f7bfe04b RS	152	smb2_set_related(&rqst[num_rqst++]);
f7bfe04b RS	153	break;
dcbf9103 RS	154	case SMB2_OP_SET_INFO:
	155	memset(&si_iov, 0, sizeof(si_iov));
	156	rqst[num_rqst].rq_iov = si_iov;
	157	rqst[num_rqst].rq_nvec = 1;
	158
bb435512	159
dcbf9103 RS	160	size[0] = sizeof(FILE_BASIC_INFO);
	161	data[0] = ptr;
	162
	163	rc = SMB2_set_info_init(tcon, &rqst[num_rqst], COMPOUND_FID,
	164	COMPOUND_FID, current->tgid,
	165	FILE_BASIC_INFORMATION,
	166	SMB2_O_INFO_FILE, 0, data, size);
e77fe73c	167	smb2_set_next_command(tcon, &rqst[num_rqst]);
dcbf9103 RS	168	smb2_set_related(&rqst[num_rqst++]);
dcbf9103 RS	169	break;
bb435512 RS	170	case SMB2_OP_RENAME:
	171	memset(&si_iov, 0, sizeof(si_iov));
	172	rqst[num_rqst].rq_iov = si_iov;
	173	rqst[num_rqst].rq_nvec = 2;
	174
	175	len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX));
	176
	177	rename_info.ReplaceIfExists = 1;
	178	rename_info.RootDirectory = 0;
	179	rename_info.FileNameLength = cpu_to_le32(len);
	180
	181	size[0] = sizeof(struct smb2_file_rename_info);
	182	data[0] = &rename_info;
	183
	184	size[1] = len + 2 /* null */;
	185	data[1] = (__le16 *)ptr;
	186
	187	rc = SMB2_set_info_init(tcon, &rqst[num_rqst], COMPOUND_FID,
	188	COMPOUND_FID, current->tgid,
	189	FILE_RENAME_INFORMATION,
	190	SMB2_O_INFO_FILE, 0, data, size);
e77fe73c	191	smb2_set_next_command(tcon, &rqst[num_rqst]);
bb435512 RS	192	smb2_set_related(&rqst[num_rqst++]);
	193	break;
	194	case SMB2_OP_HARDLINK:
	195	memset(&si_iov, 0, sizeof(si_iov));
	196	rqst[num_rqst].rq_iov = si_iov;
	197	rqst[num_rqst].rq_nvec = 2;
	198
	199	len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX));
	200
	201	link_info.ReplaceIfExists = 0;
	202	link_info.RootDirectory = 0;
	203	link_info.FileNameLength = cpu_to_le32(len);
	204
	205	size[0] = sizeof(struct smb2_file_link_info);
	206	data[0] = &link_info;
	207
	208	size[1] = len + 2 /* null */;
	209	data[1] = (__le16 *)ptr;
	210
	211	rc = SMB2_set_info_init(tcon, &rqst[num_rqst], COMPOUND_FID,
	212	COMPOUND_FID, current->tgid,
	213	FILE_LINK_INFORMATION,
	214	SMB2_O_INFO_FILE, 0, data, size);
e77fe73c	215	smb2_set_next_command(tcon, &rqst[num_rqst]);
bb435512 RS	216	smb2_set_related(&rqst[num_rqst++]);
bb435512 RS	217	break;
c5a5f38f RS	218	default:
	219	cifs_dbg(VFS, "Invalid command\n");
	220	rc = -EINVAL;
	221	}
	222	if (rc)
	223	goto finished;
	224
	225	/* Close */
	226	memset(&close_iov, 0, sizeof(close_iov));
	227	rqst[num_rqst].rq_iov = close_iov;
	228	rqst[num_rqst].rq_nvec = 1;
	229	rc = SMB2_close_init(tcon, &rqst[num_rqst], COMPOUND_FID,
	230	COMPOUND_FID);
	231	smb2_set_related(&rqst[num_rqst++]);
	232	if (rc)
	233	goto finished;
	234
	235	rc = compound_send_recv(xid, ses, flags, num_rqst, rqst,
	236	resp_buftype, rsp_iov);
	237
	238	finished:
	239	SMB2_open_free(&rqst[0]);
	240	switch (command) {
	241	case SMB2_OP_QUERY_INFO:
	242	if (rc == 0) {
c2e0fe3f RS	243	qi_rsp = (struct smb2_query_info_rsp *)
c2e0fe3f RS	244	rsp_iov[1].iov_base;
c5a5f38f	245	rc = smb2_validate_and_copy_iov(
c2e0fe3f RS	246	le16_to_cpu(qi_rsp->OutputBufferOffset),
c2e0fe3f RS	247	le32_to_cpu(qi_rsp->OutputBufferLength),
c5a5f38f	248	&rsp_iov[1], sizeof(struct smb2_file_all_info),
c2e0fe3f	249	ptr);
c5a5f38f RS	250	}
	251	if (rqst[1].rq_iov)
	252	SMB2_query_info_free(&rqst[1]);
	253	if (rqst[2].rq_iov)
	254	SMB2_close_free(&rqst[2]);
	255	break;
47dd9597	256	case SMB2_OP_DELETE:
f733e393 RS	257	case SMB2_OP_MKDIR:
	258	if (rqst[1].rq_iov)
	259	SMB2_close_free(&rqst[1]);
	260	break;
bb435512 RS	261	case SMB2_OP_HARDLINK:
bb435512 RS	262	case SMB2_OP_RENAME:
c2e0fe3f	263	case SMB2_OP_RMDIR:
dcbf9103 RS	264	case SMB2_OP_SET_EOF:
dcbf9103 RS	265	case SMB2_OP_SET_INFO:
c2e0fe3f RS	266	if (rqst[1].rq_iov)
	267	SMB2_set_info_free(&rqst[1]);
	268	if (rqst[2].rq_iov)
	269	SMB2_close_free(&rqst[2]);
	270	break;
c5a5f38f RS	271	}
	272	free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
	273	free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
	274	free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
	275	return rc;
	276	}
	277
f0df737e	278	void
be4cb9e3 PS	279	move_smb2_info_to_cifs(FILE_ALL_INFO dst, struct smb2_file_all_info src)
	280	{
	281	memcpy(dst, src, (size_t)(&src->CurrentByteOffset) - (size_t)src);
	282	dst->CurrentByteOffset = src->CurrentByteOffset;
	283	dst->Mode = src->Mode;
	284	dst->AlignmentRequirement = src->AlignmentRequirement;
	285	dst->IndexNumber1 = 0; /* we don't use it */
	286	}
	287
	288	int
	289	smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
	290	struct cifs_sb_info cifs_sb, const char full_path,
eb85d94b	291	FILE_ALL_INFO data, bool adjust_tz, bool *symlink)
be4cb9e3 PS	292	{
	293	int rc;
	294	struct smb2_file_all_info *smb2_data;
61351d6d	295	__u32 create_options = 0;
6a9cbdd1 PS	296	struct cifs_fid fid;
6a9cbdd1 PS	297	bool no_cached_open = tcon->nohandlecache;
be4cb9e3 PS	298
be4cb9e3 PS	299	*adjust_tz = false;
eb85d94b	300	*symlink = false;
be4cb9e3	301
1bbe4997	302	smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
be4cb9e3 PS	303	GFP_KERNEL);
	304	if (smb2_data == NULL)
	305	return -ENOMEM;
6a9cbdd1 PS	306
	307	/* If it is a root and its handle is cached then use it */
	308	if (!strlen(full_path) && !no_cached_open) {
	309	rc = open_shroot(xid, tcon, &fid);
	310	if (rc)
	311	goto out;
b0f6df73 RS	312
	313	if (tcon->crfid.file_all_info_is_valid) {
	314	move_smb2_info_to_cifs(data,
	315	&tcon->crfid.file_all_info);
	316	} else {
	317	rc = SMB2_query_info(xid, tcon, fid.persistent_fid,
	318	fid.volatile_fid, smb2_data);
	319	if (!rc)
	320	move_smb2_info_to_cifs(data, smb2_data);
	321	}
6a9cbdd1	322	close_shroot(&tcon->crfid);
6a9cbdd1 PS	323	goto out;
	324	}
	325
61351d6d SF	326	if (backup_cred(cifs_sb))
61351d6d SF	327	create_options \|= CREATE_OPEN_BACKUP_INTENT;
be4cb9e3	328
c5a5f38f	329	rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
61351d6d	330	FILE_READ_ATTRIBUTES, FILE_OPEN, create_options,
c5a5f38f	331	smb2_data, SMB2_OP_QUERY_INFO);
eb85d94b PS	332	if (rc == -EOPNOTSUPP) {
eb85d94b PS	333	*symlink = true;
61351d6d SF	334	create_options \|= OPEN_REPARSE_POINT;
61351d6d SF	335
eb85d94b	336	/* Failed on a symbolic link - query a reparse point info */
c5a5f38f RS	337	rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
c5a5f38f RS	338	FILE_READ_ATTRIBUTES, FILE_OPEN,
61351d6d	339	create_options, smb2_data,
c5a5f38f	340	SMB2_OP_QUERY_INFO);
eb85d94b	341	}
be4cb9e3 PS	342	if (rc)
	343	goto out;
	344
	345	move_smb2_info_to_cifs(data, smb2_data);
	346	out:
	347	kfree(smb2_data);
	348	return rc;
	349	}
a0e73183 PS	350
	351	int
	352	smb2_mkdir(const unsigned int xid, struct cifs_tcon tcon, const char name,
	353	struct cifs_sb_info *cifs_sb)
	354	{
f733e393 RS	355	return smb2_compound_op(xid, tcon, cifs_sb, name,
	356	FILE_WRITE_ATTRIBUTES, FILE_CREATE,
	357	CREATE_NOT_FILE, NULL, SMB2_OP_MKDIR);
a0e73183 PS	358	}
	359
	360	void
	361	smb2_mkdir_setinfo(struct inode inode, const char name,
	362	struct cifs_sb_info cifs_sb, struct cifs_tcon tcon,
	363	const unsigned int xid)
	364	{
	365	FILE_BASIC_INFO data;
	366	struct cifsInodeInfo *cifs_i;
	367	u32 dosattrs;
	368	int tmprc;
	369
	370	memset(&data, 0, sizeof(data));
	371	cifs_i = CIFS_I(inode);
	372	dosattrs = cifs_i->cifsAttrs \| ATTR_READONLY;
	373	data.Attributes = cpu_to_le32(dosattrs);
dcbf9103 RS	374	tmprc = smb2_compound_op(xid, tcon, cifs_sb, name,
	375	FILE_WRITE_ATTRIBUTES, FILE_CREATE,
	376	CREATE_NOT_FILE, &data, SMB2_OP_SET_INFO);
a0e73183 PS	377	if (tmprc == 0)
	378	cifs_i->cifsAttrs = dosattrs;
	379	}
1a500f01 PS	380
	381	int
	382	smb2_rmdir(const unsigned int xid, struct cifs_tcon tcon, const char name,
	383	struct cifs_sb_info *cifs_sb)
	384	{
c2e0fe3f RS	385	return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
	386	CREATE_NOT_FILE,
	387	NULL, SMB2_OP_RMDIR);
1a500f01	388	}
cbe6f439 PS	389
	390	int
	391	smb2_unlink(const unsigned int xid, struct cifs_tcon tcon, const char name,
	392	struct cifs_sb_info *cifs_sb)
	393	{
47dd9597 RS	394	return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
	395	CREATE_DELETE_ON_CLOSE \| OPEN_REPARSE_POINT,
	396	NULL, SMB2_OP_DELETE);
cbe6f439	397	}
35143eb5	398
568798cc PS	399	static int
	400	smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon,
	401	const char from_name, const char to_name,
	402	struct cifs_sb_info *cifs_sb, __u32 access, int command)
35143eb5 PS	403	{
	404	__le16 *smb2_to_name = NULL;
	405	int rc;
	406
	407	smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb);
	408	if (smb2_to_name == NULL) {
	409	rc = -ENOMEM;
	410	goto smb2_rename_path;
	411	}
bb435512 RS	412	rc = smb2_compound_op(xid, tcon, cifs_sb, from_name, access,
bb435512 RS	413	FILE_OPEN, 0, smb2_to_name, command);
35143eb5 PS	414	smb2_rename_path:
	415	kfree(smb2_to_name);
	416	return rc;
	417	}
568798cc PS	418
	419	int
	420	smb2_rename_path(const unsigned int xid, struct cifs_tcon *tcon,
	421	const char from_name, const char to_name,
	422	struct cifs_sb_info *cifs_sb)
	423	{
	424	return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
	425	DELETE, SMB2_OP_RENAME);
	426	}
	427
	428	int
	429	smb2_create_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
	430	const char from_name, const char to_name,
	431	struct cifs_sb_info *cifs_sb)
	432	{
	433	return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
	434	FILE_READ_ATTRIBUTES, SMB2_OP_HARDLINK);
	435	}
c839ff24 PS	436
	437	int
	438	smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon,
	439	const char *full_path, __u64 size,
	440	struct cifs_sb_info *cifs_sb, bool set_alloc)
	441	{
	442	__le64 eof = cpu_to_le64(size);
f7bfe04b RS	443
	444	return smb2_compound_op(xid, tcon, cifs_sb, full_path,
	445	FILE_WRITE_DATA, FILE_OPEN, 0, &eof,
	446	SMB2_OP_SET_EOF);
c839ff24	447	}
1feeaac7 PS	448
	449	int
	450	smb2_set_file_info(struct inode inode, const char full_path,
	451	FILE_BASIC_INFO *buf, const unsigned int xid)
	452	{
	453	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
	454	struct tcon_link *tlink;
	455	int rc;
	456
18dd8e1a	457	if ((buf->CreationTime == 0) && (buf->LastAccessTime == 0) &&
fd09b7d3	458	(buf->LastWriteTime == 0) && (buf->ChangeTime == 0) &&
18dd8e1a SF	459	(buf->Attributes == 0))
	460	return 0; /* would be a no op, no sense sending this */
	461
1feeaac7 PS	462	tlink = cifs_sb_tlink(cifs_sb);
	463	if (IS_ERR(tlink))
	464	return PTR_ERR(tlink);
18dd8e1a	465
dcbf9103 RS	466	rc = smb2_compound_op(xid, tlink_tcon(tlink), cifs_sb, full_path,
	467	FILE_WRITE_ATTRIBUTES, FILE_OPEN, 0, buf,
	468	SMB2_OP_SET_INFO);
1feeaac7 PS	469	cifs_put_tlink(tlink);
	470	return rc;
	471	}