[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;
	case SMB2_OP_SET_EOF:
		tmprc = SMB2_set_eof(xid, tcon, persistent_fid, volatile_fid,
				     current->tgid, (__le64 *)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);
}

int
smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon,
		   const char *full_path, __u64 size,
		   struct cifs_sb_info *cifs_sb, bool set_alloc)
{
	__le64 eof = cpu_to_le64(size);
	return smb2_open_op_close(xid, tcon, cifs_sb, full_path,
				  FILE_WRITE_DATA, FILE_OPEN, 0, 0, &eof,
				  SMB2_OP_SET_EOF);
}
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;
c839ff24 PS	85	case SMB2_OP_SET_EOF:
	86	tmprc = SMB2_set_eof(xid, tcon, persistent_fid, volatile_fid,
	87	current->tgid, (__le64 *)data);
	88	break;
be4cb9e3 PS	89	default:
	90	cERROR(1, "Invalid command");
	91	break;
	92	}
	93
	94	rc = SMB2_close(xid, tcon, persistent_fid, volatile_fid);
	95	if (tmprc)
	96	rc = tmprc;
	97	kfree(utf16_path);
	98	return rc;
	99	}
	100
f0df737e	101	void
be4cb9e3 PS	102	move_smb2_info_to_cifs(FILE_ALL_INFO dst, struct smb2_file_all_info src)
	103	{
	104	memcpy(dst, src, (size_t)(&src->CurrentByteOffset) - (size_t)src);
	105	dst->CurrentByteOffset = src->CurrentByteOffset;
	106	dst->Mode = src->Mode;
	107	dst->AlignmentRequirement = src->AlignmentRequirement;
	108	dst->IndexNumber1 = 0; /* we don't use it */
	109	}
	110
	111	int
	112	smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
	113	struct cifs_sb_info cifs_sb, const char full_path,
	114	FILE_ALL_INFO data, bool adjust_tz)
	115	{
	116	int rc;
	117	struct smb2_file_all_info *smb2_data;
	118
	119	*adjust_tz = false;
	120
	121	smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + MAX_NAME * 2,
	122	GFP_KERNEL);
	123	if (smb2_data == NULL)
	124	return -ENOMEM;
	125
	126	rc = smb2_open_op_close(xid, tcon, cifs_sb, full_path,
	127	FILE_READ_ATTRIBUTES, FILE_OPEN, 0, 0,
	128	smb2_data, SMB2_OP_QUERY_INFO);
	129	if (rc)
	130	goto out;
	131
	132	move_smb2_info_to_cifs(data, smb2_data);
	133	out:
	134	kfree(smb2_data);
	135	return rc;
	136	}
a0e73183 PS	137
	138	int
	139	smb2_mkdir(const unsigned int xid, struct cifs_tcon tcon, const char name,
	140	struct cifs_sb_info *cifs_sb)
	141	{
	142	return smb2_open_op_close(xid, tcon, cifs_sb, name,
	143	FILE_WRITE_ATTRIBUTES, FILE_CREATE, 0,
	144	CREATE_NOT_FILE, NULL, SMB2_OP_MKDIR);
	145	}
	146
	147	void
	148	smb2_mkdir_setinfo(struct inode inode, const char name,
	149	struct cifs_sb_info cifs_sb, struct cifs_tcon tcon,
	150	const unsigned int xid)
	151	{
	152	FILE_BASIC_INFO data;
	153	struct cifsInodeInfo *cifs_i;
	154	u32 dosattrs;
	155	int tmprc;
	156
	157	memset(&data, 0, sizeof(data));
	158	cifs_i = CIFS_I(inode);
	159	dosattrs = cifs_i->cifsAttrs \| ATTR_READONLY;
	160	data.Attributes = cpu_to_le32(dosattrs);
	161	tmprc = smb2_open_op_close(xid, tcon, cifs_sb, name,
	162	FILE_WRITE_ATTRIBUTES, FILE_CREATE, 0,
	163	CREATE_NOT_FILE, &data, SMB2_OP_SET_INFO);
	164	if (tmprc == 0)
	165	cifs_i->cifsAttrs = dosattrs;
	166	}
1a500f01 PS	167
	168	int
	169	smb2_rmdir(const unsigned int xid, struct cifs_tcon tcon, const char name,
	170	struct cifs_sb_info *cifs_sb)
	171	{
	172	return smb2_open_op_close(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
	173	0, CREATE_NOT_FILE \| CREATE_DELETE_ON_CLOSE,
	174	NULL, SMB2_OP_DELETE);
	175	}
cbe6f439 PS	176
	177	int
	178	smb2_unlink(const unsigned int xid, struct cifs_tcon tcon, const char name,
	179	struct cifs_sb_info *cifs_sb)
	180	{
	181	return smb2_open_op_close(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
	182	0, CREATE_DELETE_ON_CLOSE, NULL,
	183	SMB2_OP_DELETE);
	184	}
35143eb5	185
568798cc PS	186	static int
	187	smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon,
	188	const char from_name, const char to_name,
	189	struct cifs_sb_info *cifs_sb, __u32 access, int command)
35143eb5 PS	190	{
	191	__le16 *smb2_to_name = NULL;
	192	int rc;
	193
	194	smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb);
	195	if (smb2_to_name == NULL) {
	196	rc = -ENOMEM;
	197	goto smb2_rename_path;
	198	}
	199
568798cc PS	200	rc = smb2_open_op_close(xid, tcon, cifs_sb, from_name, access,
568798cc PS	201	FILE_OPEN, 0, 0, smb2_to_name, command);
35143eb5 PS	202	smb2_rename_path:
	203	kfree(smb2_to_name);
	204	return rc;
	205	}
568798cc PS	206
	207	int
	208	smb2_rename_path(const unsigned int xid, struct cifs_tcon *tcon,
	209	const char from_name, const char to_name,
	210	struct cifs_sb_info *cifs_sb)
	211	{
	212	return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
	213	DELETE, SMB2_OP_RENAME);
	214	}
	215
	216	int
	217	smb2_create_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
	218	const char from_name, const char to_name,
	219	struct cifs_sb_info *cifs_sb)
	220	{
	221	return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
	222	FILE_READ_ATTRIBUTES, SMB2_OP_HARDLINK);
	223	}
c839ff24 PS	224
	225	int
	226	smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon,
	227	const char *full_path, __u64 size,
	228	struct cifs_sb_info *cifs_sb, bool set_alloc)
	229	{
	230	__le64 eof = cpu_to_le64(size);
	231	return smb2_open_op_close(xid, tcon, cifs_sb, full_path,
	232	FILE_WRITE_DATA, FILE_OPEN, 0, 0, &eof,
	233	SMB2_OP_SET_EOF);
	234	}