[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 void
free_set_inf_compound(struct smb_rqst *rqst)
{
	if (rqst[1].rq_iov)
		SMB2_set_info_free(&rqst[1]);
	if (rqst[2].rq_iov)
		SMB2_close_free(&rqst[2]);
}


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, umode_t mode, void *ptr, int command,
		 struct cifsFileInfo *cfile)
{
	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));

	/* We already have a handle so we can skip the open */
	if (cfile)
		goto after_open;

	/* Open */
	utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
	if (!utf16_path) {
		rc = -ENOMEM;
		goto finished;
	}

	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;
	oparms.mode = mode;

	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]);
 after_open:
	num_rqst++;
	rc = 0;

	/* 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;

		if (cfile)
			rc = SMB2_query_info_init(tcon, &rqst[num_rqst],
				cfile->fid.persistent_fid,
				cfile->fid.volatile_fid,
				FILE_ALL_INFORMATION,
				SMB2_O_INFO_FILE, 0,
				sizeof(struct smb2_file_all_info) +
					  PATH_MAX * 2, 0, NULL);
		else {
			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);
			if (!rc) {
				smb2_set_next_command(tcon, &rqst[num_rqst]);
				smb2_set_related(&rqst[num_rqst]);
			}
		}

		if (rc)
			goto finished;
		num_rqst++;
		trace_smb3_query_info_compound_enter(xid, ses->Suid, tcon->tid,
						     full_path);
		break;
	case SMB2_OP_DELETE:
		trace_smb3_delete_enter(xid, ses->Suid, tcon->tid, full_path);
		break;
	case SMB2_OP_MKDIR:
		/*
		 * Directories are created through parameters in the
		 * SMB2_open() call.
		 */
		trace_smb3_mkdir_enter(xid, ses->Suid, tcon->tid, full_path);
		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);
		if (rc)
			goto finished;
		smb2_set_next_command(tcon, &rqst[num_rqst]);
		smb2_set_related(&rqst[num_rqst++]);
		trace_smb3_rmdir_enter(xid, ses->Suid, tcon->tid, full_path);
		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);
		if (rc)
			goto finished;
		smb2_set_next_command(tcon, &rqst[num_rqst]);
		smb2_set_related(&rqst[num_rqst++]);
		trace_smb3_set_eof_enter(xid, ses->Suid, tcon->tid, full_path);
		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;

		if (cfile)
			rc = SMB2_set_info_init(tcon, &rqst[num_rqst],
				cfile->fid.persistent_fid,
				cfile->fid.volatile_fid, current->tgid,
				FILE_BASIC_INFORMATION,
				SMB2_O_INFO_FILE, 0, data, size);
		else {
			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);
			if (!rc) {
				smb2_set_next_command(tcon, &rqst[num_rqst]);
				smb2_set_related(&rqst[num_rqst]);
			}
		}

		if (rc)
			goto finished;
		num_rqst++;
		trace_smb3_set_info_compound_enter(xid, ses->Suid, tcon->tid,
						   full_path);
		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;

		if (cfile)
			rc = SMB2_set_info_init(tcon, &rqst[num_rqst],
						cfile->fid.persistent_fid,
						cfile->fid.volatile_fid,
					current->tgid, FILE_RENAME_INFORMATION,
					SMB2_O_INFO_FILE, 0, data, size);
		else {
			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);
			if (!rc) {
				smb2_set_next_command(tcon, &rqst[num_rqst]);
				smb2_set_related(&rqst[num_rqst]);
			}
		}
		if (rc)
			goto finished;
		num_rqst++;
		trace_smb3_rename_enter(xid, ses->Suid, tcon->tid, full_path);
		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);
		if (rc)
			goto finished;
		smb2_set_next_command(tcon, &rqst[num_rqst]);
		smb2_set_related(&rqst[num_rqst++]);
		trace_smb3_hardlink_enter(xid, ses->Suid, tcon->tid, full_path);
		break;
	default:
		cifs_dbg(VFS, "Invalid command\n");
		rc = -EINVAL;
	}
	if (rc)
		goto finished;

	/* We already have a handle so we can skip the close */
	if (cfile)
		goto after_close;
	/* 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;
 after_close:
	num_rqst++;

	if (cfile) {
		cifsFileInfo_put(cfile);
		cfile = NULL;
		rc = compound_send_recv(xid, ses, flags, num_rqst - 2,
					&rqst[1], &resp_buftype[1],
					&rsp_iov[1]);
	} else
		rc = compound_send_recv(xid, ses, flags, num_rqst,
					rqst, resp_buftype,
					rsp_iov);

 finished:
	if (cfile)
		cifsFileInfo_put(cfile);

	SMB2_open_free(&rqst[0]);
	if (rc == -EREMCHG) {
		printk_once(KERN_WARNING "server share %s deleted\n",
			    tcon->treeName);
		tcon->need_reconnect = true;
	}

	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]);
		if (rc)
			trace_smb3_query_info_compound_err(xid,  ses->Suid,
						tcon->tid, rc);
		else
			trace_smb3_query_info_compound_done(xid, ses->Suid,
						tcon->tid);
		break;
	case SMB2_OP_DELETE:
		if (rc)
			trace_smb3_delete_err(xid,  ses->Suid, tcon->tid, rc);
		else
			trace_smb3_delete_done(xid, ses->Suid, tcon->tid);
		if (rqst[1].rq_iov)
			SMB2_close_free(&rqst[1]);
		break;
	case SMB2_OP_MKDIR:
		if (rc)
			trace_smb3_mkdir_err(xid,  ses->Suid, tcon->tid, rc);
		else
			trace_smb3_mkdir_done(xid, ses->Suid, tcon->tid);
		if (rqst[1].rq_iov)
			SMB2_close_free(&rqst[1]);
		break;
	case SMB2_OP_HARDLINK:
		if (rc)
			trace_smb3_hardlink_err(xid,  ses->Suid, tcon->tid, rc);
		else
			trace_smb3_hardlink_done(xid, ses->Suid, tcon->tid);
		free_set_inf_compound(rqst);
		break;
	case SMB2_OP_RENAME:
		if (rc)
			trace_smb3_rename_err(xid,  ses->Suid, tcon->tid, rc);
		else
			trace_smb3_rename_done(xid, ses->Suid, tcon->tid);
		free_set_inf_compound(rqst);
		break;
	case SMB2_OP_RMDIR:
		if (rc)
			trace_smb3_rmdir_err(xid,  ses->Suid, tcon->tid, rc);
		else
			trace_smb3_rmdir_done(xid, ses->Suid, tcon->tid);
		free_set_inf_compound(rqst);
		break;
	case SMB2_OP_SET_EOF:
		if (rc)
			trace_smb3_set_eof_err(xid,  ses->Suid, tcon->tid, rc);
		else
			trace_smb3_set_eof_done(xid, ses->Suid, tcon->tid);
		free_set_inf_compound(rqst);
		break;
	case SMB2_OP_SET_INFO:
		if (rc)
			trace_smb3_set_info_compound_err(xid,  ses->Suid,
						tcon->tid, rc);
		else
			trace_smb3_set_info_compound_done(xid, ses->Suid,
						tcon->tid);
		free_set_inf_compound(rqst);
		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;
	struct cifsFileInfo *cfile;

	*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;

	cifs_get_readable_path(tcon, full_path, &cfile);
	rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
			      FILE_READ_ATTRIBUTES, FILE_OPEN, create_options,
			      ACL_NO_MODE, smb2_data, SMB2_OP_QUERY_INFO, cfile);
	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, ACL_NO_MODE,
				      smb2_data, SMB2_OP_QUERY_INFO, NULL);
	}
	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 inode *parent_inode, umode_t mode,
	   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, mode, NULL, SMB2_OP_MKDIR,
				NULL);
}

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;
	struct cifsFileInfo *cfile;
	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);
	cifs_get_writable_path(tcon, name, &cfile);
	tmprc = smb2_compound_op(xid, tcon, cifs_sb, name,
				 FILE_WRITE_ATTRIBUTES, FILE_CREATE,
				 CREATE_NOT_FILE, ACL_NO_MODE,
				 &data, SMB2_OP_SET_INFO, cfile);
	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, ACL_NO_MODE,
				NULL, SMB2_OP_RMDIR, NULL);
}

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,
				ACL_NO_MODE, NULL, SMB2_OP_DELETE, NULL);
}

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,
		   struct cifsFileInfo *cfile)
{
	__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, ACL_NO_MODE, smb2_to_name,
			      command, cfile);
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)
{
	struct cifsFileInfo *cfile;

	cifs_get_writable_path(tcon, from_name, &cfile);

	return smb2_set_path_attr(xid, tcon, from_name, to_name,
				  cifs_sb, DELETE, SMB2_OP_RENAME, cfile);
}

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,
				  NULL);
}

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, ACL_NO_MODE,
				&eof, SMB2_OP_SET_EOF, NULL);
}

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, ACL_NO_MODE, buf, SMB2_OP_SET_INFO, NULL);
	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
8191576a SF	40	static void
	41	free_set_inf_compound(struct smb_rqst *rqst)
	42	{
	43	if (rqst[1].rq_iov)
	44	SMB2_set_info_free(&rqst[1]);
	45	if (rqst[2].rq_iov)
	46	SMB2_close_free(&rqst[2]);
	47	}
	48
	49
c5a5f38f RS	50	static int
	51	smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon,
	52	struct cifs_sb_info cifs_sb, const char full_path,
	53	__u32 desired_access, __u32 create_disposition,
c3ca78e2	54	__u32 create_options, umode_t mode, void *ptr, int command,
8de9e86c	55	struct cifsFileInfo *cfile)
c5a5f38f RS	56	{
	57	int rc;
	58	__le16 *utf16_path = NULL;
	59	__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
	60	struct cifs_open_parms oparms;
	61	struct cifs_fid fid;
	62	struct cifs_ses *ses = tcon->ses;
c5a5f38f RS	63	int num_rqst = 0;
	64	struct smb_rqst rqst[3];
	65	int resp_buftype[3];
	66	struct kvec rsp_iov[3];
	67	struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
	68	struct kvec qi_iov[1];
14e562ad	69	struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
c5a5f38f	70	struct kvec close_iov[1];
c2e0fe3f	71	struct smb2_query_info_rsp *qi_rsp = NULL;
c5a5f38f	72	int flags = 0;
c2e0fe3f	73	__u8 delete_pending[8] = {1, 0, 0, 0, 0, 0, 0, 0};
bb435512 RS	74	unsigned int size[2];
	75	void *data[2];
	76	struct smb2_file_rename_info rename_info;
	77	struct smb2_file_link_info link_info;
	78	int len;
c5a5f38f RS	79
	80	if (smb3_encryption_required(tcon))
	81	flags \|= CIFS_TRANSFORM_REQ;
	82
	83	memset(rqst, 0, sizeof(rqst));
	84	resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
	85	memset(rsp_iov, 0, sizeof(rsp_iov));
	86
8de9e86c RS	87	/* We already have a handle so we can skip the open */
	88	if (cfile)
	89	goto after_open;
	90
c5a5f38f RS	91	/* Open */
c5a5f38f RS	92	utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
8de9e86c RS	93	if (!utf16_path) {
	94	rc = -ENOMEM;
	95	goto finished;
	96	}
c5a5f38f RS	97
	98	oparms.tcon = tcon;
	99	oparms.desired_access = desired_access;
	100	oparms.disposition = create_disposition;
	101	oparms.create_options = create_options;
4d5bdf28 SF	102	if (backup_cred(cifs_sb))
4d5bdf28 SF	103	oparms.create_options \|= CREATE_OPEN_BACKUP_INTENT;
c5a5f38f RS	104	oparms.fid = &fid;
c5a5f38f RS	105	oparms.reconnect = false;
c3ca78e2	106	oparms.mode = mode;
c5a5f38f RS	107
	108	memset(&open_iov, 0, sizeof(open_iov));
	109	rqst[num_rqst].rq_iov = open_iov;
	110	rqst[num_rqst].rq_nvec = SMB2_CREATE_IOV_SIZE;
	111	rc = SMB2_open_init(tcon, &rqst[num_rqst], &oplock, &oparms,
	112	utf16_path);
	113	kfree(utf16_path);
	114	if (rc)
	115	goto finished;
	116
8de9e86c RS	117	smb2_set_next_command(tcon, &rqst[num_rqst]);
	118	after_open:
	119	num_rqst++;
	120	rc = 0;
c5a5f38f RS	121
	122	/* Operation */
	123	switch (command) {
	124	case SMB2_OP_QUERY_INFO:
	125	memset(&qi_iov, 0, sizeof(qi_iov));
	126	rqst[num_rqst].rq_iov = qi_iov;
	127	rqst[num_rqst].rq_nvec = 1;
	128
496902dc RS	129	if (cfile)
	130	rc = SMB2_query_info_init(tcon, &rqst[num_rqst],
	131	cfile->fid.persistent_fid,
	132	cfile->fid.volatile_fid,
	133	FILE_ALL_INFORMATION,
c5a5f38f RS	134	SMB2_O_INFO_FILE, 0,
c5a5f38f RS	135	sizeof(struct smb2_file_all_info) +
f5b05d62	136	PATH_MAX * 2, 0, NULL);
496902dc RS	137	else {
	138	rc = SMB2_query_info_init(tcon, &rqst[num_rqst],
	139	COMPOUND_FID,
	140	COMPOUND_FID,
	141	FILE_ALL_INFORMATION,
	142	SMB2_O_INFO_FILE, 0,
	143	sizeof(struct smb2_file_all_info) +
	144	PATH_MAX * 2, 0, NULL);
	145	if (!rc) {
	146	smb2_set_next_command(tcon, &rqst[num_rqst]);
	147	smb2_set_related(&rqst[num_rqst]);
	148	}
	149	}
	150
88a92c91 RS	151	if (rc)
88a92c91 RS	152	goto finished;
496902dc	153	num_rqst++;
8191576a SF	154	trace_smb3_query_info_compound_enter(xid, ses->Suid, tcon->tid,
8191576a SF	155	full_path);
c5a5f38f	156	break;
47dd9597	157	case SMB2_OP_DELETE:
8191576a	158	trace_smb3_delete_enter(xid, ses->Suid, tcon->tid, full_path);
47dd9597	159	break;
f733e393 RS	160	case SMB2_OP_MKDIR:
	161	/*
	162	* Directories are created through parameters in the
	163	* SMB2_open() call.
	164	*/
8191576a	165	trace_smb3_mkdir_enter(xid, ses->Suid, tcon->tid, full_path);
f733e393	166	break;
c2e0fe3f RS	167	case SMB2_OP_RMDIR:
	168	memset(&si_iov, 0, sizeof(si_iov));
	169	rqst[num_rqst].rq_iov = si_iov;
	170	rqst[num_rqst].rq_nvec = 1;
	171
271b9c0c	172	size[0] = 1; /* sizeof __u8 See MS-FSCC section 2.4.11 */
c2e0fe3f RS	173	data[0] = &delete_pending[0];
	174
	175	rc = SMB2_set_info_init(tcon, &rqst[num_rqst], COMPOUND_FID,
	176	COMPOUND_FID, current->tgid,
	177	FILE_DISPOSITION_INFORMATION,
	178	SMB2_O_INFO_FILE, 0, data, size);
88a92c91 RS	179	if (rc)
88a92c91 RS	180	goto finished;
e77fe73c	181	smb2_set_next_command(tcon, &rqst[num_rqst]);
c2e0fe3f	182	smb2_set_related(&rqst[num_rqst++]);
8191576a	183	trace_smb3_rmdir_enter(xid, ses->Suid, tcon->tid, full_path);
c2e0fe3f	184	break;
f7bfe04b RS	185	case SMB2_OP_SET_EOF:
	186	memset(&si_iov, 0, sizeof(si_iov));
	187	rqst[num_rqst].rq_iov = si_iov;
	188	rqst[num_rqst].rq_nvec = 1;
	189
	190	size[0] = 8; /* sizeof __le64 */
	191	data[0] = ptr;
	192
	193	rc = SMB2_set_info_init(tcon, &rqst[num_rqst], COMPOUND_FID,
	194	COMPOUND_FID, current->tgid,
	195	FILE_END_OF_FILE_INFORMATION,
	196	SMB2_O_INFO_FILE, 0, data, size);
88a92c91 RS	197	if (rc)
88a92c91 RS	198	goto finished;
e77fe73c	199	smb2_set_next_command(tcon, &rqst[num_rqst]);
f7bfe04b	200	smb2_set_related(&rqst[num_rqst++]);
8191576a	201	trace_smb3_set_eof_enter(xid, ses->Suid, tcon->tid, full_path);
f7bfe04b	202	break;
dcbf9103 RS	203	case SMB2_OP_SET_INFO:
	204	memset(&si_iov, 0, sizeof(si_iov));
	205	rqst[num_rqst].rq_iov = si_iov;
	206	rqst[num_rqst].rq_nvec = 1;
	207
bb435512	208
dcbf9103 RS	209	size[0] = sizeof(FILE_BASIC_INFO);
	210	data[0] = ptr;
	211
dc9300a6 RS	212	if (cfile)
	213	rc = SMB2_set_info_init(tcon, &rqst[num_rqst],
	214	cfile->fid.persistent_fid,
	215	cfile->fid.volatile_fid, current->tgid,
	216	FILE_BASIC_INFORMATION,
	217	SMB2_O_INFO_FILE, 0, data, size);
	218	else {
	219	rc = SMB2_set_info_init(tcon, &rqst[num_rqst],
	220	COMPOUND_FID,
	221	COMPOUND_FID, current->tgid,
	222	FILE_BASIC_INFORMATION,
	223	SMB2_O_INFO_FILE, 0, data, size);
	224	if (!rc) {
	225	smb2_set_next_command(tcon, &rqst[num_rqst]);
	226	smb2_set_related(&rqst[num_rqst]);
	227	}
	228	}
	229
88a92c91 RS	230	if (rc)
88a92c91 RS	231	goto finished;
dc9300a6	232	num_rqst++;
8191576a SF	233	trace_smb3_set_info_compound_enter(xid, ses->Suid, tcon->tid,
8191576a SF	234	full_path);
dcbf9103	235	break;
bb435512 RS	236	case SMB2_OP_RENAME:
	237	memset(&si_iov, 0, sizeof(si_iov));
	238	rqst[num_rqst].rq_iov = si_iov;
	239	rqst[num_rqst].rq_nvec = 2;
	240
	241	len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX));
	242
	243	rename_info.ReplaceIfExists = 1;
	244	rename_info.RootDirectory = 0;
	245	rename_info.FileNameLength = cpu_to_le32(len);
	246
	247	size[0] = sizeof(struct smb2_file_rename_info);
	248	data[0] = &rename_info;
	249
	250	size[1] = len + 2 /* null */;
	251	data[1] = (__le16 *)ptr;
	252
8de9e86c RS	253	if (cfile)
	254	rc = SMB2_set_info_init(tcon, &rqst[num_rqst],
	255	cfile->fid.persistent_fid,
	256	cfile->fid.volatile_fid,
	257	current->tgid, FILE_RENAME_INFORMATION,
	258	SMB2_O_INFO_FILE, 0, data, size);
	259	else {
	260	rc = SMB2_set_info_init(tcon, &rqst[num_rqst],
	261	COMPOUND_FID, COMPOUND_FID,
	262	current->tgid, FILE_RENAME_INFORMATION,
bb435512	263	SMB2_O_INFO_FILE, 0, data, size);
dc9300a6 RS	264	if (!rc) {
	265	smb2_set_next_command(tcon, &rqst[num_rqst]);
	266	smb2_set_related(&rqst[num_rqst]);
	267	}
8de9e86c	268	}
88a92c91 RS	269	if (rc)
88a92c91 RS	270	goto finished;
8de9e86c	271	num_rqst++;
8191576a	272	trace_smb3_rename_enter(xid, ses->Suid, tcon->tid, full_path);
bb435512 RS	273	break;
	274	case SMB2_OP_HARDLINK:
	275	memset(&si_iov, 0, sizeof(si_iov));
	276	rqst[num_rqst].rq_iov = si_iov;
	277	rqst[num_rqst].rq_nvec = 2;
	278
	279	len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX));
	280
	281	link_info.ReplaceIfExists = 0;
	282	link_info.RootDirectory = 0;
	283	link_info.FileNameLength = cpu_to_le32(len);
	284
	285	size[0] = sizeof(struct smb2_file_link_info);
	286	data[0] = &link_info;
	287
	288	size[1] = len + 2 /* null */;
	289	data[1] = (__le16 *)ptr;
	290
	291	rc = SMB2_set_info_init(tcon, &rqst[num_rqst], COMPOUND_FID,
	292	COMPOUND_FID, current->tgid,
	293	FILE_LINK_INFORMATION,
	294	SMB2_O_INFO_FILE, 0, data, size);
88a92c91 RS	295	if (rc)
88a92c91 RS	296	goto finished;
e77fe73c	297	smb2_set_next_command(tcon, &rqst[num_rqst]);
bb435512	298	smb2_set_related(&rqst[num_rqst++]);
8191576a	299	trace_smb3_hardlink_enter(xid, ses->Suid, tcon->tid, full_path);
bb435512	300	break;
c5a5f38f RS	301	default:
	302	cifs_dbg(VFS, "Invalid command\n");
	303	rc = -EINVAL;
	304	}
	305	if (rc)
	306	goto finished;
	307
8de9e86c RS	308	/* We already have a handle so we can skip the close */
	309	if (cfile)
	310	goto after_close;
c5a5f38f RS	311	/* Close */
	312	memset(&close_iov, 0, sizeof(close_iov));
	313	rqst[num_rqst].rq_iov = close_iov;
	314	rqst[num_rqst].rq_nvec = 1;
	315	rc = SMB2_close_init(tcon, &rqst[num_rqst], COMPOUND_FID,
	316	COMPOUND_FID);
8de9e86c	317	smb2_set_related(&rqst[num_rqst]);
c5a5f38f RS	318	if (rc)
c5a5f38f RS	319	goto finished;
8de9e86c RS	320	after_close:
	321	num_rqst++;
	322
	323	if (cfile) {
	324	cifsFileInfo_put(cfile);
	325	cfile = NULL;
	326	rc = compound_send_recv(xid, ses, flags, num_rqst - 2,
	327	&rqst[1], &resp_buftype[1],
	328	&rsp_iov[1]);
	329	} else
	330	rc = compound_send_recv(xid, ses, flags, num_rqst,
	331	rqst, resp_buftype,
	332	rsp_iov);
c5a5f38f RS	333
c5a5f38f RS	334	finished:
8de9e86c RS	335	if (cfile)
	336	cifsFileInfo_put(cfile);
	337
c5a5f38f	338	SMB2_open_free(&rqst[0]);
7dcc82c2 SF	339	if (rc == -EREMCHG) {
	340	printk_once(KERN_WARNING "server share %s deleted\n",
	341	tcon->treeName);
	342	tcon->need_reconnect = true;
	343	}
	344
c5a5f38f RS	345	switch (command) {
	346	case SMB2_OP_QUERY_INFO:
	347	if (rc == 0) {
c2e0fe3f RS	348	qi_rsp = (struct smb2_query_info_rsp *)
c2e0fe3f RS	349	rsp_iov[1].iov_base;
c5a5f38f	350	rc = smb2_validate_and_copy_iov(
c2e0fe3f RS	351	le16_to_cpu(qi_rsp->OutputBufferOffset),
c2e0fe3f RS	352	le32_to_cpu(qi_rsp->OutputBufferLength),
c5a5f38f	353	&rsp_iov[1], sizeof(struct smb2_file_all_info),
c2e0fe3f	354	ptr);
c5a5f38f RS	355	}
	356	if (rqst[1].rq_iov)
	357	SMB2_query_info_free(&rqst[1]);
	358	if (rqst[2].rq_iov)
	359	SMB2_close_free(&rqst[2]);
8191576a SF	360	if (rc)
	361	trace_smb3_query_info_compound_err(xid, ses->Suid,
	362	tcon->tid, rc);
	363	else
	364	trace_smb3_query_info_compound_done(xid, ses->Suid,
	365	tcon->tid);
c5a5f38f	366	break;
47dd9597	367	case SMB2_OP_DELETE:
8191576a SF	368	if (rc)
	369	trace_smb3_delete_err(xid, ses->Suid, tcon->tid, rc);
	370	else
	371	trace_smb3_delete_done(xid, ses->Suid, tcon->tid);
	372	if (rqst[1].rq_iov)
	373	SMB2_close_free(&rqst[1]);
	374	break;
f733e393	375	case SMB2_OP_MKDIR:
8191576a SF	376	if (rc)
	377	trace_smb3_mkdir_err(xid, ses->Suid, tcon->tid, rc);
	378	else
	379	trace_smb3_mkdir_done(xid, ses->Suid, tcon->tid);
f733e393 RS	380	if (rqst[1].rq_iov)
	381	SMB2_close_free(&rqst[1]);
	382	break;
bb435512	383	case SMB2_OP_HARDLINK:
8191576a SF	384	if (rc)
	385	trace_smb3_hardlink_err(xid, ses->Suid, tcon->tid, rc);
	386	else
	387	trace_smb3_hardlink_done(xid, ses->Suid, tcon->tid);
	388	free_set_inf_compound(rqst);
	389	break;
bb435512	390	case SMB2_OP_RENAME:
8191576a SF	391	if (rc)
	392	trace_smb3_rename_err(xid, ses->Suid, tcon->tid, rc);
	393	else
	394	trace_smb3_rename_done(xid, ses->Suid, tcon->tid);
	395	free_set_inf_compound(rqst);
	396	break;
c2e0fe3f	397	case SMB2_OP_RMDIR:
8191576a SF	398	if (rc)
	399	trace_smb3_rmdir_err(xid, ses->Suid, tcon->tid, rc);
	400	else
	401	trace_smb3_rmdir_done(xid, ses->Suid, tcon->tid);
	402	free_set_inf_compound(rqst);
	403	break;
dcbf9103	404	case SMB2_OP_SET_EOF:
8191576a SF	405	if (rc)
	406	trace_smb3_set_eof_err(xid, ses->Suid, tcon->tid, rc);
	407	else
	408	trace_smb3_set_eof_done(xid, ses->Suid, tcon->tid);
	409	free_set_inf_compound(rqst);
	410	break;
dcbf9103	411	case SMB2_OP_SET_INFO:
8191576a SF	412	if (rc)
	413	trace_smb3_set_info_compound_err(xid, ses->Suid,
	414	tcon->tid, rc);
	415	else
	416	trace_smb3_set_info_compound_done(xid, ses->Suid,
	417	tcon->tid);
	418	free_set_inf_compound(rqst);
c2e0fe3f	419	break;
c5a5f38f RS	420	}
	421	free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
	422	free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
	423	free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
	424	return rc;
	425	}
	426
f0df737e	427	void
be4cb9e3 PS	428	move_smb2_info_to_cifs(FILE_ALL_INFO dst, struct smb2_file_all_info src)
	429	{
	430	memcpy(dst, src, (size_t)(&src->CurrentByteOffset) - (size_t)src);
	431	dst->CurrentByteOffset = src->CurrentByteOffset;
	432	dst->Mode = src->Mode;
	433	dst->AlignmentRequirement = src->AlignmentRequirement;
	434	dst->IndexNumber1 = 0; /* we don't use it */
	435	}
	436
	437	int
	438	smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
	439	struct cifs_sb_info cifs_sb, const char full_path,
eb85d94b	440	FILE_ALL_INFO data, bool adjust_tz, bool *symlink)
be4cb9e3 PS	441	{
	442	int rc;
	443	struct smb2_file_all_info *smb2_data;
61351d6d	444	__u32 create_options = 0;
6a9cbdd1 PS	445	struct cifs_fid fid;
6a9cbdd1 PS	446	bool no_cached_open = tcon->nohandlecache;
496902dc	447	struct cifsFileInfo *cfile;
be4cb9e3 PS	448
be4cb9e3 PS	449	*adjust_tz = false;
eb85d94b	450	*symlink = false;
be4cb9e3	451
1bbe4997	452	smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
be4cb9e3 PS	453	GFP_KERNEL);
	454	if (smb2_data == NULL)
	455	return -ENOMEM;
6a9cbdd1 PS	456
	457	/* If it is a root and its handle is cached then use it */
	458	if (!strlen(full_path) && !no_cached_open) {
	459	rc = open_shroot(xid, tcon, &fid);
	460	if (rc)
	461	goto out;
b0f6df73 RS	462
	463	if (tcon->crfid.file_all_info_is_valid) {
	464	move_smb2_info_to_cifs(data,
	465	&tcon->crfid.file_all_info);
	466	} else {
	467	rc = SMB2_query_info(xid, tcon, fid.persistent_fid,
	468	fid.volatile_fid, smb2_data);
	469	if (!rc)
	470	move_smb2_info_to_cifs(data, smb2_data);
	471	}
6a9cbdd1	472	close_shroot(&tcon->crfid);
6a9cbdd1 PS	473	goto out;
	474	}
	475
61351d6d SF	476	if (backup_cred(cifs_sb))
61351d6d SF	477	create_options \|= CREATE_OPEN_BACKUP_INTENT;
be4cb9e3	478
496902dc	479	cifs_get_readable_path(tcon, full_path, &cfile);
c5a5f38f	480	rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
61351d6d	481	FILE_READ_ATTRIBUTES, FILE_OPEN, create_options,
c3ca78e2	482	ACL_NO_MODE, smb2_data, SMB2_OP_QUERY_INFO, cfile);
eb85d94b PS	483	if (rc == -EOPNOTSUPP) {
eb85d94b PS	484	*symlink = true;
61351d6d SF	485	create_options \|= OPEN_REPARSE_POINT;
61351d6d SF	486
eb85d94b	487	/* Failed on a symbolic link - query a reparse point info */
c5a5f38f RS	488	rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
c5a5f38f RS	489	FILE_READ_ATTRIBUTES, FILE_OPEN,
c3ca78e2 SF	490	create_options, ACL_NO_MODE,
c3ca78e2 SF	491	smb2_data, SMB2_OP_QUERY_INFO, NULL);
eb85d94b	492	}
be4cb9e3 PS	493	if (rc)
	494	goto out;
	495
	496	move_smb2_info_to_cifs(data, smb2_data);
	497	out:
	498	kfree(smb2_data);
	499	return rc;
	500	}
a0e73183 PS	501
a0e73183 PS	502	int
c3ca78e2 SF	503	smb2_mkdir(const unsigned int xid, struct inode *parent_inode, umode_t mode,
c3ca78e2 SF	504	struct cifs_tcon tcon, const char name,
a0e73183 PS	505	struct cifs_sb_info *cifs_sb)
a0e73183 PS	506	{
f733e393 RS	507	return smb2_compound_op(xid, tcon, cifs_sb, name,
f733e393 RS	508	FILE_WRITE_ATTRIBUTES, FILE_CREATE,
c3ca78e2 SF	509	CREATE_NOT_FILE, mode, NULL, SMB2_OP_MKDIR,
c3ca78e2 SF	510	NULL);
a0e73183 PS	511	}
	512
	513	void
	514	smb2_mkdir_setinfo(struct inode inode, const char name,
	515	struct cifs_sb_info cifs_sb, struct cifs_tcon tcon,
	516	const unsigned int xid)
	517	{
	518	FILE_BASIC_INFO data;
	519	struct cifsInodeInfo *cifs_i;
dc9300a6	520	struct cifsFileInfo *cfile;
a0e73183 PS	521	u32 dosattrs;
	522	int tmprc;
	523
	524	memset(&data, 0, sizeof(data));
	525	cifs_i = CIFS_I(inode);
	526	dosattrs = cifs_i->cifsAttrs \| ATTR_READONLY;
	527	data.Attributes = cpu_to_le32(dosattrs);
dc9300a6	528	cifs_get_writable_path(tcon, name, &cfile);
dcbf9103 RS	529	tmprc = smb2_compound_op(xid, tcon, cifs_sb, name,
dcbf9103 RS	530	FILE_WRITE_ATTRIBUTES, FILE_CREATE,
c3ca78e2 SF	531	CREATE_NOT_FILE, ACL_NO_MODE,
c3ca78e2 SF	532	&data, SMB2_OP_SET_INFO, cfile);
a0e73183 PS	533	if (tmprc == 0)
	534	cifs_i->cifsAttrs = dosattrs;
	535	}
1a500f01 PS	536
	537	int
	538	smb2_rmdir(const unsigned int xid, struct cifs_tcon tcon, const char name,
	539	struct cifs_sb_info *cifs_sb)
	540	{
c2e0fe3f	541	return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
c3ca78e2	542	CREATE_NOT_FILE, ACL_NO_MODE,
8de9e86c	543	NULL, SMB2_OP_RMDIR, NULL);
1a500f01	544	}
cbe6f439 PS	545
	546	int
	547	smb2_unlink(const unsigned int xid, struct cifs_tcon tcon, const char name,
	548	struct cifs_sb_info *cifs_sb)
	549	{
47dd9597 RS	550	return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
47dd9597 RS	551	CREATE_DELETE_ON_CLOSE \| OPEN_REPARSE_POINT,
c3ca78e2	552	ACL_NO_MODE, NULL, SMB2_OP_DELETE, NULL);
cbe6f439	553	}
35143eb5	554
568798cc PS	555	static int
	556	smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon,
	557	const char from_name, const char to_name,
8de9e86c RS	558	struct cifs_sb_info *cifs_sb, __u32 access, int command,
8de9e86c RS	559	struct cifsFileInfo *cfile)
35143eb5 PS	560	{
	561	__le16 *smb2_to_name = NULL;
	562	int rc;
	563
	564	smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb);
	565	if (smb2_to_name == NULL) {
	566	rc = -ENOMEM;
	567	goto smb2_rename_path;
	568	}
bb435512	569	rc = smb2_compound_op(xid, tcon, cifs_sb, from_name, access,
c3ca78e2 SF	570	FILE_OPEN, 0, ACL_NO_MODE, smb2_to_name,
c3ca78e2 SF	571	command, cfile);
35143eb5 PS	572	smb2_rename_path:
	573	kfree(smb2_to_name);
	574	return rc;
	575	}
568798cc PS	576
	577	int
	578	smb2_rename_path(const unsigned int xid, struct cifs_tcon *tcon,
	579	const char from_name, const char to_name,
	580	struct cifs_sb_info *cifs_sb)
	581	{
8de9e86c RS	582	struct cifsFileInfo *cfile;
	583
	584	cifs_get_writable_path(tcon, from_name, &cfile);
	585
	586	return smb2_set_path_attr(xid, tcon, from_name, to_name,
	587	cifs_sb, DELETE, SMB2_OP_RENAME, cfile);
568798cc PS	588	}
	589
	590	int
	591	smb2_create_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
	592	const char from_name, const char to_name,
	593	struct cifs_sb_info *cifs_sb)
	594	{
	595	return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
8de9e86c RS	596	FILE_READ_ATTRIBUTES, SMB2_OP_HARDLINK,
8de9e86c RS	597	NULL);
568798cc	598	}
c839ff24 PS	599
	600	int
	601	smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon,
	602	const char *full_path, __u64 size,
	603	struct cifs_sb_info *cifs_sb, bool set_alloc)
	604	{
	605	__le64 eof = cpu_to_le64(size);
f7bfe04b RS	606
f7bfe04b RS	607	return smb2_compound_op(xid, tcon, cifs_sb, full_path,
c3ca78e2 SF	608	FILE_WRITE_DATA, FILE_OPEN, 0, ACL_NO_MODE,
c3ca78e2 SF	609	&eof, SMB2_OP_SET_EOF, NULL);
c839ff24	610	}
1feeaac7 PS	611
	612	int
	613	smb2_set_file_info(struct inode inode, const char full_path,
	614	FILE_BASIC_INFO *buf, const unsigned int xid)
	615	{
	616	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
	617	struct tcon_link *tlink;
	618	int rc;
	619
18dd8e1a	620	if ((buf->CreationTime == 0) && (buf->LastAccessTime == 0) &&
fd09b7d3	621	(buf->LastWriteTime == 0) && (buf->ChangeTime == 0) &&
18dd8e1a SF	622	(buf->Attributes == 0))
	623	return 0; /* would be a no op, no sense sending this */
	624
1feeaac7 PS	625	tlink = cifs_sb_tlink(cifs_sb);
	626	if (IS_ERR(tlink))
	627	return PTR_ERR(tlink);
18dd8e1a	628
dcbf9103	629	rc = smb2_compound_op(xid, tlink_tcon(tlink), cifs_sb, full_path,
c3ca78e2 SF	630	FILE_WRITE_ATTRIBUTES, FILE_OPEN,
c3ca78e2 SF	631	0, ACL_NO_MODE, buf, SMB2_OP_SET_INFO, NULL);
1feeaac7 PS	632	cifs_put_tlink(tlink);
	633	return rc;
	634	}