[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;
	__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;

	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, &oplock, 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;
	case SMB2_OP_SET_INFO:
		tmprc = SMB2_set_info(xid, tcon, persistent_fid, volatile_fid,
				      (FILE_BASIC_INFO *)data);
		break;
	default:
		cifs_dbg(VFS, "Invalid command\n");
		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) + PATH_MAX * 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);
}

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;

	tlink = cifs_sb_tlink(cifs_sb);
	if (IS_ERR(tlink))
		return PTR_ERR(tlink);
	rc = smb2_open_op_close(xid, tlink_tcon(tlink), cifs_sb, full_path,
				FILE_WRITE_ATTRIBUTES, FILE_OPEN, 0, 0, buf,
				SMB2_OP_SET_INFO);
	cifs_put_tlink(tlink);
	return rc;
}
Commit	Line	Data
be4cb9e3 PS	1	/*
	2	* fs/cifs/smb2inode.c
	3	*
	4	* Copyright (C) International Business Machines Corp., 2002, 2011
	5	* Etersoft, 2012
	6	* Author(s): Pavel Shilovsky (pshilovsky@samba.org),
	7	* Steve French (sfrench@us.ibm.com)
	8	*
	9	* This library is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU Lesser General Public License as published
	11	* by the Free Software Foundation; either version 2.1 of the License, or
	12	* (at your option) any later version.
	13	*
	14	* This library is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
	17	* the GNU Lesser General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU Lesser General Public License
	20	* along with this library; if not, write to the Free Software
	21	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	22	*/
	23	#include <linux/fs.h>
	24	#include <linux/stat.h>
	25	#include <linux/slab.h>
	26	#include <linux/pagemap.h>
	27	#include <asm/div64.h>
	28	#include "cifsfs.h"
	29	#include "cifspdu.h"
	30	#include "cifsglob.h"
	31	#include "cifsproto.h"
	32	#include "cifs_debug.h"
	33	#include "cifs_fs_sb.h"
	34	#include "cifs_unicode.h"
	35	#include "fscache.h"
	36	#include "smb2glob.h"
	37	#include "smb2pdu.h"
	38	#include "smb2proto.h"
	39
	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;
2e44b288	50	__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
be4cb9e3 PS	51
	52	utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
	53	if (!utf16_path)
	54	return -ENOMEM;
	55
	56	rc = SMB2_open(xid, tcon, utf16_path, &persistent_fid, &volatile_fid,
	57	desired_access, create_disposition, file_attributes,
2e44b288	58	create_options, &oplock, NULL);
be4cb9e3 PS	59	if (rc) {
	60	kfree(utf16_path);
	61	return rc;
	62	}
	63
	64	switch (command) {
	65	case SMB2_OP_DELETE:
	66	break;
	67	case SMB2_OP_QUERY_INFO:
	68	tmprc = SMB2_query_info(xid, tcon, persistent_fid,
	69	volatile_fid,
	70	(struct smb2_file_all_info *)data);
	71	break;
	72	case SMB2_OP_MKDIR:
	73	/*
	74	* Directories are created through parameters in the
	75	* SMB2_open() call.
	76	*/
	77	break;
35143eb5 PS	78	case SMB2_OP_RENAME:
	79	tmprc = SMB2_rename(xid, tcon, persistent_fid, volatile_fid,
	80	(__le16 *)data);
	81	break;
568798cc PS	82	case SMB2_OP_HARDLINK:
	83	tmprc = SMB2_set_hardlink(xid, tcon, persistent_fid,
	84	volatile_fid, (__le16 *)data);
	85	break;
c839ff24 PS	86	case SMB2_OP_SET_EOF:
	87	tmprc = SMB2_set_eof(xid, tcon, persistent_fid, volatile_fid,
	88	current->tgid, (__le64 *)data);
	89	break;
1feeaac7 PS	90	case SMB2_OP_SET_INFO:
	91	tmprc = SMB2_set_info(xid, tcon, persistent_fid, volatile_fid,
	92	(FILE_BASIC_INFO *)data);
	93	break;
be4cb9e3	94	default:
f96637be	95	cifs_dbg(VFS, "Invalid command\n");
be4cb9e3 PS	96	break;
	97	}
	98
	99	rc = SMB2_close(xid, tcon, persistent_fid, volatile_fid);
	100	if (tmprc)
	101	rc = tmprc;
	102	kfree(utf16_path);
	103	return rc;
	104	}
	105
f0df737e	106	void
be4cb9e3 PS	107	move_smb2_info_to_cifs(FILE_ALL_INFO dst, struct smb2_file_all_info src)
	108	{
	109	memcpy(dst, src, (size_t)(&src->CurrentByteOffset) - (size_t)src);
	110	dst->CurrentByteOffset = src->CurrentByteOffset;
	111	dst->Mode = src->Mode;
	112	dst->AlignmentRequirement = src->AlignmentRequirement;
	113	dst->IndexNumber1 = 0; /* we don't use it */
	114	}
	115
	116	int
	117	smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
	118	struct cifs_sb_info cifs_sb, const char full_path,
	119	FILE_ALL_INFO data, bool adjust_tz)
	120	{
	121	int rc;
	122	struct smb2_file_all_info *smb2_data;
	123
	124	*adjust_tz = false;
	125
0c17ceb6	126	smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
be4cb9e3 PS	127	GFP_KERNEL);
	128	if (smb2_data == NULL)
	129	return -ENOMEM;
	130
	131	rc = smb2_open_op_close(xid, tcon, cifs_sb, full_path,
	132	FILE_READ_ATTRIBUTES, FILE_OPEN, 0, 0,
	133	smb2_data, SMB2_OP_QUERY_INFO);
	134	if (rc)
	135	goto out;
	136
	137	move_smb2_info_to_cifs(data, smb2_data);
	138	out:
	139	kfree(smb2_data);
	140	return rc;
	141	}
a0e73183 PS	142
	143	int
	144	smb2_mkdir(const unsigned int xid, struct cifs_tcon tcon, const char name,
	145	struct cifs_sb_info *cifs_sb)
	146	{
	147	return smb2_open_op_close(xid, tcon, cifs_sb, name,
	148	FILE_WRITE_ATTRIBUTES, FILE_CREATE, 0,
	149	CREATE_NOT_FILE, NULL, SMB2_OP_MKDIR);
	150	}
	151
	152	void
	153	smb2_mkdir_setinfo(struct inode inode, const char name,
	154	struct cifs_sb_info cifs_sb, struct cifs_tcon tcon,
	155	const unsigned int xid)
	156	{
	157	FILE_BASIC_INFO data;
	158	struct cifsInodeInfo *cifs_i;
	159	u32 dosattrs;
	160	int tmprc;
	161
	162	memset(&data, 0, sizeof(data));
	163	cifs_i = CIFS_I(inode);
	164	dosattrs = cifs_i->cifsAttrs \| ATTR_READONLY;
	165	data.Attributes = cpu_to_le32(dosattrs);
	166	tmprc = smb2_open_op_close(xid, tcon, cifs_sb, name,
	167	FILE_WRITE_ATTRIBUTES, FILE_CREATE, 0,
	168	CREATE_NOT_FILE, &data, SMB2_OP_SET_INFO);
	169	if (tmprc == 0)
	170	cifs_i->cifsAttrs = dosattrs;
	171	}
1a500f01 PS	172
	173	int
	174	smb2_rmdir(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_NOT_FILE \| CREATE_DELETE_ON_CLOSE,
	179	NULL, SMB2_OP_DELETE);
	180	}
cbe6f439 PS	181
	182	int
	183	smb2_unlink(const unsigned int xid, struct cifs_tcon tcon, const char name,
	184	struct cifs_sb_info *cifs_sb)
	185	{
	186	return smb2_open_op_close(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
	187	0, CREATE_DELETE_ON_CLOSE, NULL,
	188	SMB2_OP_DELETE);
	189	}
35143eb5	190
568798cc PS	191	static int
	192	smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon,
	193	const char from_name, const char to_name,
	194	struct cifs_sb_info *cifs_sb, __u32 access, int command)
35143eb5 PS	195	{
	196	__le16 *smb2_to_name = NULL;
	197	int rc;
	198
	199	smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb);
	200	if (smb2_to_name == NULL) {
	201	rc = -ENOMEM;
	202	goto smb2_rename_path;
	203	}
	204
568798cc PS	205	rc = smb2_open_op_close(xid, tcon, cifs_sb, from_name, access,
568798cc PS	206	FILE_OPEN, 0, 0, smb2_to_name, command);
35143eb5 PS	207	smb2_rename_path:
	208	kfree(smb2_to_name);
	209	return rc;
	210	}
568798cc PS	211
	212	int
	213	smb2_rename_path(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	DELETE, SMB2_OP_RENAME);
	219	}
	220
	221	int
	222	smb2_create_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
	223	const char from_name, const char to_name,
	224	struct cifs_sb_info *cifs_sb)
	225	{
	226	return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
	227	FILE_READ_ATTRIBUTES, SMB2_OP_HARDLINK);
	228	}
c839ff24 PS	229
	230	int
	231	smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon,
	232	const char *full_path, __u64 size,
	233	struct cifs_sb_info *cifs_sb, bool set_alloc)
	234	{
	235	__le64 eof = cpu_to_le64(size);
	236	return smb2_open_op_close(xid, tcon, cifs_sb, full_path,
	237	FILE_WRITE_DATA, FILE_OPEN, 0, 0, &eof,
	238	SMB2_OP_SET_EOF);
	239	}
1feeaac7 PS	240
	241	int
	242	smb2_set_file_info(struct inode inode, const char full_path,
	243	FILE_BASIC_INFO *buf, const unsigned int xid)
	244	{
	245	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
	246	struct tcon_link *tlink;
	247	int rc;
	248
	249	tlink = cifs_sb_tlink(cifs_sb);
	250	if (IS_ERR(tlink))
	251	return PTR_ERR(tlink);
	252	rc = smb2_open_op_close(xid, tlink_tcon(tlink), cifs_sb, full_path,
	253	FILE_WRITE_ATTRIBUTES, FILE_OPEN, 0, 0, buf,
	254	SMB2_OP_SET_INFO);
	255	cifs_put_tlink(tlink);
	256	return rc;
	257	}