[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, 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;

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