[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / cifs / smb2inode.c

/*
 *   fs/cifs/smb2inode.c
 *
 *   Copyright (C) International Business Machines  Corp., 2002, 2011
 *                 Etersoft, 2012
 *   Author(s): Pavel Shilovsky (pshilovsky@samba.org),
 *              Steve French (sfrench@us.ibm.com)
 *
 *   This library is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU Lesser General Public License as published
 *   by the Free Software Foundation; either version 2.1 of the License, or
 *   (at your option) any later version.
 *
 *   This library is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
 *   the GNU Lesser General Public License for more details.
 *
 *   You should have received a copy of the GNU Lesser General Public License
 *   along with this library; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
#include <linux/fs.h>
#include <linux/stat.h>
#include <linux/slab.h>
#include <linux/pagemap.h>
#include <asm/div64.h>
#include "cifsfs.h"
#include "cifspdu.h"
#include "cifsglob.h"
#include "cifsproto.h"
#include "cifs_debug.h"
#include "cifs_fs_sb.h"
#include "cifs_unicode.h"
#include "fscache.h"
#include "smb2glob.h"
#include "smb2pdu.h"
#include "smb2proto.h"

static int
smb2_open_op_close(const unsigned int xid, struct cifs_tcon *tcon,
		   struct cifs_sb_info *cifs_sb, const char *full_path,
		   __u32 desired_access, __u32 create_disposition,
		   __u32 file_attributes, __u32 create_options,
		   void *data, int command)
{
	int rc, tmprc = 0;
	u64 persistent_fid, volatile_fid;
	__le16 *utf16_path;

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

	rc = SMB2_open(xid, tcon, utf16_path, &persistent_fid, &volatile_fid,
		       desired_access, create_disposition, file_attributes,
		       create_options, NULL);
	if (rc) {
		kfree(utf16_path);
		return rc;
	}

	switch (command) {
	case SMB2_OP_DELETE:
		break;
	case SMB2_OP_QUERY_INFO:
		tmprc = SMB2_query_info(xid, tcon, persistent_fid,
					volatile_fid,
					(struct smb2_file_all_info *)data);
		break;
	case SMB2_OP_MKDIR:
		/*
		 * Directories are created through parameters in the
		 * SMB2_open() call.
		 */
		break;
	case SMB2_OP_RENAME:
		tmprc = SMB2_rename(xid, tcon, persistent_fid, volatile_fid,
				    (__le16 *)data);
		break;
	case SMB2_OP_HARDLINK:
		tmprc = SMB2_set_hardlink(xid, tcon, persistent_fid,
					  volatile_fid, (__le16 *)data);
		break;
	default:
		cERROR(1, "Invalid command");
		break;
	}

	rc = SMB2_close(xid, tcon, persistent_fid, volatile_fid);
	if (tmprc)
		rc = tmprc;
	kfree(utf16_path);
	return rc;
}

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

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

	*adjust_tz = false;

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

	rc = smb2_open_op_close(xid, tcon, cifs_sb, full_path,
				FILE_READ_ATTRIBUTES, FILE_OPEN, 0, 0,
				smb2_data, SMB2_OP_QUERY_INFO);
	if (rc)
		goto out;

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

int
smb2_mkdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
	   struct cifs_sb_info *cifs_sb)
{
	return smb2_open_op_close(xid, tcon, cifs_sb, name,
				  FILE_WRITE_ATTRIBUTES, FILE_CREATE, 0,
				  CREATE_NOT_FILE, NULL, SMB2_OP_MKDIR);
}

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

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

int
smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
	   struct cifs_sb_info *cifs_sb)
{
	return smb2_open_op_close(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
				  0, CREATE_NOT_FILE | CREATE_DELETE_ON_CLOSE,
				  NULL, SMB2_OP_DELETE);
}

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

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

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

	rc = smb2_open_op_close(xid, tcon, cifs_sb, from_name, access,
				FILE_OPEN, 0, 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);
}
Commit	Line	Data
be4cb9e3 PS	1	/*
	2	* fs/cifs/smb2inode.c
	3	*
	4	* Copyright (C) International Business Machines Corp., 2002, 2011
	5	* Etersoft, 2012
	6	* Author(s): Pavel Shilovsky (pshilovsky@samba.org),
	7	* Steve French (sfrench@us.ibm.com)
	8	*
	9	* This library is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU Lesser General Public License as published
	11	* by the Free Software Foundation; either version 2.1 of the License, or
	12	* (at your option) any later version.
	13	*
	14	* This library is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
	17	* the GNU Lesser General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU Lesser General Public License
	20	* along with this library; if not, write to the Free Software
	21	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	22	*/
	23	#include <linux/fs.h>
	24	#include <linux/stat.h>
	25	#include <linux/slab.h>
	26	#include <linux/pagemap.h>
	27	#include <asm/div64.h>
	28	#include "cifsfs.h"
	29	#include "cifspdu.h"
	30	#include "cifsglob.h"
	31	#include "cifsproto.h"
	32	#include "cifs_debug.h"
	33	#include "cifs_fs_sb.h"
	34	#include "cifs_unicode.h"
	35	#include "fscache.h"
	36	#include "smb2glob.h"
	37	#include "smb2pdu.h"
	38	#include "smb2proto.h"
	39
	40	static int
	41	smb2_open_op_close(const unsigned int xid, struct cifs_tcon *tcon,
	42	struct cifs_sb_info cifs_sb, const char full_path,
	43	__u32 desired_access, __u32 create_disposition,
	44	__u32 file_attributes, __u32 create_options,
	45	void *data, int command)
	46	{
	47	int rc, tmprc = 0;
	48	u64 persistent_fid, volatile_fid;
	49	__le16 *utf16_path;
	50
	51	utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
	52	if (!utf16_path)
	53	return -ENOMEM;
	54
	55	rc = SMB2_open(xid, tcon, utf16_path, &persistent_fid, &volatile_fid,
	56	desired_access, create_disposition, file_attributes,
f0df737e	57	create_options, NULL);
be4cb9e3 PS	58	if (rc) {
	59	kfree(utf16_path);
	60	return rc;
	61	}
	62
	63	switch (command) {
	64	case SMB2_OP_DELETE:
	65	break;
	66	case SMB2_OP_QUERY_INFO:
	67	tmprc = SMB2_query_info(xid, tcon, persistent_fid,
	68	volatile_fid,
	69	(struct smb2_file_all_info *)data);
	70	break;
	71	case SMB2_OP_MKDIR:
	72	/*
	73	* Directories are created through parameters in the
	74	* SMB2_open() call.
	75	*/
	76	break;
35143eb5 PS	77	case SMB2_OP_RENAME:
	78	tmprc = SMB2_rename(xid, tcon, persistent_fid, volatile_fid,
	79	(__le16 *)data);
	80	break;
568798cc PS	81	case SMB2_OP_HARDLINK:
	82	tmprc = SMB2_set_hardlink(xid, tcon, persistent_fid,
	83	volatile_fid, (__le16 *)data);
	84	break;
be4cb9e3 PS	85	default:
	86	cERROR(1, "Invalid command");
	87	break;
	88	}
	89
	90	rc = SMB2_close(xid, tcon, persistent_fid, volatile_fid);
	91	if (tmprc)
	92	rc = tmprc;
	93	kfree(utf16_path);
	94	return rc;
	95	}
	96
f0df737e	97	void
be4cb9e3 PS	98	move_smb2_info_to_cifs(FILE_ALL_INFO dst, struct smb2_file_all_info src)
	99	{
	100	memcpy(dst, src, (size_t)(&src->CurrentByteOffset) - (size_t)src);
	101	dst->CurrentByteOffset = src->CurrentByteOffset;
	102	dst->Mode = src->Mode;
	103	dst->AlignmentRequirement = src->AlignmentRequirement;
	104	dst->IndexNumber1 = 0; /* we don't use it */
	105	}
	106
	107	int
	108	smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
	109	struct cifs_sb_info cifs_sb, const char full_path,
	110	FILE_ALL_INFO data, bool adjust_tz)
	111	{
	112	int rc;
	113	struct smb2_file_all_info *smb2_data;
	114
	115	*adjust_tz = false;
	116
	117	smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + MAX_NAME * 2,
	118	GFP_KERNEL);
	119	if (smb2_data == NULL)
	120	return -ENOMEM;
	121
	122	rc = smb2_open_op_close(xid, tcon, cifs_sb, full_path,
	123	FILE_READ_ATTRIBUTES, FILE_OPEN, 0, 0,
	124	smb2_data, SMB2_OP_QUERY_INFO);
	125	if (rc)
	126	goto out;
	127
	128	move_smb2_info_to_cifs(data, smb2_data);
	129	out:
	130	kfree(smb2_data);
	131	return rc;
	132	}
a0e73183 PS	133
	134	int
	135	smb2_mkdir(const unsigned int xid, struct cifs_tcon tcon, const char name,
	136	struct cifs_sb_info *cifs_sb)
	137	{
	138	return smb2_open_op_close(xid, tcon, cifs_sb, name,
	139	FILE_WRITE_ATTRIBUTES, FILE_CREATE, 0,
	140	CREATE_NOT_FILE, NULL, SMB2_OP_MKDIR);
	141	}
	142
	143	void
	144	smb2_mkdir_setinfo(struct inode inode, const char name,
	145	struct cifs_sb_info cifs_sb, struct cifs_tcon tcon,
	146	const unsigned int xid)
	147	{
	148	FILE_BASIC_INFO data;
	149	struct cifsInodeInfo *cifs_i;
	150	u32 dosattrs;
	151	int tmprc;
	152
	153	memset(&data, 0, sizeof(data));
	154	cifs_i = CIFS_I(inode);
	155	dosattrs = cifs_i->cifsAttrs \| ATTR_READONLY;
	156	data.Attributes = cpu_to_le32(dosattrs);
	157	tmprc = smb2_open_op_close(xid, tcon, cifs_sb, name,
	158	FILE_WRITE_ATTRIBUTES, FILE_CREATE, 0,
	159	CREATE_NOT_FILE, &data, SMB2_OP_SET_INFO);
	160	if (tmprc == 0)
	161	cifs_i->cifsAttrs = dosattrs;
	162	}
1a500f01 PS	163
	164	int
	165	smb2_rmdir(const unsigned int xid, struct cifs_tcon tcon, const char name,
	166	struct cifs_sb_info *cifs_sb)
	167	{
	168	return smb2_open_op_close(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
	169	0, CREATE_NOT_FILE \| CREATE_DELETE_ON_CLOSE,
	170	NULL, SMB2_OP_DELETE);
	171	}
cbe6f439 PS	172
	173	int
	174	smb2_unlink(const unsigned int xid, struct cifs_tcon tcon, const char name,
	175	struct cifs_sb_info *cifs_sb)
	176	{
	177	return smb2_open_op_close(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
	178	0, CREATE_DELETE_ON_CLOSE, NULL,
	179	SMB2_OP_DELETE);
	180	}
35143eb5	181
568798cc PS	182	static int
	183	smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon,
	184	const char from_name, const char to_name,
	185	struct cifs_sb_info *cifs_sb, __u32 access, int command)
35143eb5 PS	186	{
	187	__le16 *smb2_to_name = NULL;
	188	int rc;
	189
	190	smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb);
	191	if (smb2_to_name == NULL) {
	192	rc = -ENOMEM;
	193	goto smb2_rename_path;
	194	}
	195
568798cc PS	196	rc = smb2_open_op_close(xid, tcon, cifs_sb, from_name, access,
568798cc PS	197	FILE_OPEN, 0, 0, smb2_to_name, command);
35143eb5 PS	198	smb2_rename_path:
	199	kfree(smb2_to_name);
	200	return rc;
	201	}
568798cc PS	202
	203	int
	204	smb2_rename_path(const unsigned int xid, struct cifs_tcon *tcon,
	205	const char from_name, const char to_name,
	206	struct cifs_sb_info *cifs_sb)
	207	{
	208	return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
	209	DELETE, SMB2_OP_RENAME);
	210	}
	211
	212	int
	213	smb2_create_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
	214	const char from_name, const char to_name,
	215	struct cifs_sb_info *cifs_sb)
	216	{
	217	return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
	218	FILE_READ_ATTRIBUTES, SMB2_OP_HARDLINK);
	219	}