[mirror_ubuntu-bionic-kernel.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 create_options, void *data, int command)
{
	int rc, tmprc = 0;
	__le16 *utf16_path;
	__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
	struct cifs_open_parms oparms;
	struct cifs_fid fid;

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

	oparms.tcon = tcon;
	oparms.desired_access = desired_access;
	oparms.disposition = create_disposition;
	oparms.create_options = create_options;
	oparms.fid = &fid;
	oparms.reconnect = false;

	rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, 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, fid.persistent_fid,
					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_RMDIR:
		tmprc = SMB2_rmdir(xid, tcon, fid.persistent_fid,
				   fid.volatile_fid);
		break;
	case SMB2_OP_RENAME:
		tmprc = SMB2_rename(xid, tcon, fid.persistent_fid,
				    fid.volatile_fid, (__le16 *)data);
		break;
	case SMB2_OP_HARDLINK:
		tmprc = SMB2_set_hardlink(xid, tcon, fid.persistent_fid,
					  fid.volatile_fid, (__le16 *)data);
		break;
	case SMB2_OP_SET_EOF:
		tmprc = SMB2_set_eof(xid, tcon, fid.persistent_fid,
				     fid.volatile_fid, current->tgid,
				     (__le64 *)data, false);
		break;
	case SMB2_OP_SET_INFO:
		tmprc = SMB2_set_info(xid, tcon, fid.persistent_fid,
				      fid.volatile_fid,
				      (FILE_BASIC_INFO *)data);
		break;
	default:
		cifs_dbg(VFS, "Invalid command\n");
		break;
	}

	rc = SMB2_close(xid, tcon, fid.persistent_fid, 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, bool *symlink)
{
	int rc;
	struct smb2_file_all_info *smb2_data;

	*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;

	rc = smb2_open_op_close(xid, tcon, cifs_sb, full_path,
				FILE_READ_ATTRIBUTES, FILE_OPEN, 0,
				smb2_data, SMB2_OP_QUERY_INFO);
	if (rc == -EOPNOTSUPP) {
		*symlink = true;
		/* Failed on a symbolic link - query a reparse point info */
		rc = smb2_open_op_close(xid, tcon, cifs_sb, full_path,
					FILE_READ_ATTRIBUTES, FILE_OPEN,
					OPEN_REPARSE_POINT, 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,
				  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,
				   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,
				  CREATE_NOT_FILE,
				  NULL, SMB2_OP_RMDIR);
}

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,
				  CREATE_DELETE_ON_CLOSE | OPEN_REPARSE_POINT,
				  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, 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, &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;

	if ((buf->CreationTime == 0) && (buf->LastAccessTime == 0) &&
	    (buf->LastWriteTime == 0) && (buf->ChangeTime) &&
	    (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_open_op_close(xid, tlink_tcon(tlink), cifs_sb, full_path,
				FILE_WRITE_ATTRIBUTES, FILE_OPEN, 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,
ca81983f	44	__u32 create_options, void *data, int command)
be4cb9e3 PS	45	{
be4cb9e3 PS	46	int rc, tmprc = 0;
be4cb9e3	47	__le16 *utf16_path;
2e44b288	48	__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
064f6047 PS	49	struct cifs_open_parms oparms;
064f6047 PS	50	struct cifs_fid fid;
be4cb9e3 PS	51
	52	utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
	53	if (!utf16_path)
	54	return -ENOMEM;
	55
064f6047 PS	56	oparms.tcon = tcon;
	57	oparms.desired_access = desired_access;
	58	oparms.disposition = create_disposition;
	59	oparms.create_options = create_options;
	60	oparms.fid = &fid;
9cbc0b73	61	oparms.reconnect = false;
064f6047	62
b42bf888	63	rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
be4cb9e3 PS	64	if (rc) {
	65	kfree(utf16_path);
	66	return rc;
	67	}
	68
	69	switch (command) {
	70	case SMB2_OP_DELETE:
	71	break;
	72	case SMB2_OP_QUERY_INFO:
064f6047 PS	73	tmprc = SMB2_query_info(xid, tcon, fid.persistent_fid,
064f6047 PS	74	fid.volatile_fid,
be4cb9e3 PS	75	(struct smb2_file_all_info *)data);
	76	break;
	77	case SMB2_OP_MKDIR:
	78	/*
	79	* Directories are created through parameters in the
	80	* SMB2_open() call.
	81	*/
	82	break;
897fba11 SF	83	case SMB2_OP_RMDIR:
	84	tmprc = SMB2_rmdir(xid, tcon, fid.persistent_fid,
	85	fid.volatile_fid);
	86	break;
35143eb5	87	case SMB2_OP_RENAME:
064f6047 PS	88	tmprc = SMB2_rename(xid, tcon, fid.persistent_fid,
064f6047 PS	89	fid.volatile_fid, (__le16 *)data);
35143eb5	90	break;
568798cc	91	case SMB2_OP_HARDLINK:
064f6047 PS	92	tmprc = SMB2_set_hardlink(xid, tcon, fid.persistent_fid,
064f6047 PS	93	fid.volatile_fid, (__le16 *)data);
568798cc	94	break;
c839ff24	95	case SMB2_OP_SET_EOF:
064f6047 PS	96	tmprc = SMB2_set_eof(xid, tcon, fid.persistent_fid,
064f6047 PS	97	fid.volatile_fid, current->tgid,
f29ebb47	98	(__le64 *)data, false);
c839ff24	99	break;
1feeaac7	100	case SMB2_OP_SET_INFO:
064f6047 PS	101	tmprc = SMB2_set_info(xid, tcon, fid.persistent_fid,
064f6047 PS	102	fid.volatile_fid,
1feeaac7 PS	103	(FILE_BASIC_INFO *)data);
1feeaac7 PS	104	break;
be4cb9e3	105	default:
f96637be	106	cifs_dbg(VFS, "Invalid command\n");
be4cb9e3 PS	107	break;
	108	}
	109
064f6047	110	rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
be4cb9e3 PS	111	if (tmprc)
	112	rc = tmprc;
	113	kfree(utf16_path);
	114	return rc;
	115	}
	116
f0df737e	117	void
be4cb9e3 PS	118	move_smb2_info_to_cifs(FILE_ALL_INFO dst, struct smb2_file_all_info src)
	119	{
	120	memcpy(dst, src, (size_t)(&src->CurrentByteOffset) - (size_t)src);
	121	dst->CurrentByteOffset = src->CurrentByteOffset;
	122	dst->Mode = src->Mode;
	123	dst->AlignmentRequirement = src->AlignmentRequirement;
	124	dst->IndexNumber1 = 0; /* we don't use it */
	125	}
	126
	127	int
	128	smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
	129	struct cifs_sb_info cifs_sb, const char full_path,
eb85d94b	130	FILE_ALL_INFO data, bool adjust_tz, bool *symlink)
be4cb9e3 PS	131	{
	132	int rc;
	133	struct smb2_file_all_info *smb2_data;
	134
	135	*adjust_tz = false;
eb85d94b	136	*symlink = false;
be4cb9e3	137
1bbe4997	138	smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
be4cb9e3 PS	139	GFP_KERNEL);
	140	if (smb2_data == NULL)
	141	return -ENOMEM;
	142
	143	rc = smb2_open_op_close(xid, tcon, cifs_sb, full_path,
eb85d94b PS	144	FILE_READ_ATTRIBUTES, FILE_OPEN, 0,
	145	smb2_data, SMB2_OP_QUERY_INFO);
	146	if (rc == -EOPNOTSUPP) {
	147	*symlink = true;
	148	/* Failed on a symbolic link - query a reparse point info */
	149	rc = smb2_open_op_close(xid, tcon, cifs_sb, full_path,
	150	FILE_READ_ATTRIBUTES, FILE_OPEN,
	151	OPEN_REPARSE_POINT, smb2_data,
	152	SMB2_OP_QUERY_INFO);
	153	}
be4cb9e3 PS	154	if (rc)
	155	goto out;
	156
	157	move_smb2_info_to_cifs(data, smb2_data);
	158	out:
	159	kfree(smb2_data);
	160	return rc;
	161	}
a0e73183 PS	162
	163	int
	164	smb2_mkdir(const unsigned int xid, struct cifs_tcon tcon, const char name,
	165	struct cifs_sb_info *cifs_sb)
	166	{
	167	return smb2_open_op_close(xid, tcon, cifs_sb, name,
ca81983f	168	FILE_WRITE_ATTRIBUTES, FILE_CREATE,
a0e73183 PS	169	CREATE_NOT_FILE, NULL, SMB2_OP_MKDIR);
	170	}
	171
	172	void
	173	smb2_mkdir_setinfo(struct inode inode, const char name,
	174	struct cifs_sb_info cifs_sb, struct cifs_tcon tcon,
	175	const unsigned int xid)
	176	{
	177	FILE_BASIC_INFO data;
	178	struct cifsInodeInfo *cifs_i;
	179	u32 dosattrs;
	180	int tmprc;
	181
	182	memset(&data, 0, sizeof(data));
	183	cifs_i = CIFS_I(inode);
	184	dosattrs = cifs_i->cifsAttrs \| ATTR_READONLY;
	185	data.Attributes = cpu_to_le32(dosattrs);
	186	tmprc = smb2_open_op_close(xid, tcon, cifs_sb, name,
ca81983f	187	FILE_WRITE_ATTRIBUTES, FILE_CREATE,
a0e73183 PS	188	CREATE_NOT_FILE, &data, SMB2_OP_SET_INFO);
	189	if (tmprc == 0)
	190	cifs_i->cifsAttrs = dosattrs;
	191	}
1a500f01 PS	192
	193	int
	194	smb2_rmdir(const unsigned int xid, struct cifs_tcon tcon, const char name,
	195	struct cifs_sb_info *cifs_sb)
	196	{
	197	return smb2_open_op_close(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
897fba11 SF	198	CREATE_NOT_FILE,
897fba11 SF	199	NULL, SMB2_OP_RMDIR);
1a500f01	200	}
cbe6f439 PS	201
	202	int
	203	smb2_unlink(const unsigned int xid, struct cifs_tcon tcon, const char name,
	204	struct cifs_sb_info *cifs_sb)
	205	{
	206	return smb2_open_op_close(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
b42bf888 PS	207	CREATE_DELETE_ON_CLOSE \| OPEN_REPARSE_POINT,
b42bf888 PS	208	NULL, SMB2_OP_DELETE);
cbe6f439	209	}
35143eb5	210
568798cc PS	211	static int
	212	smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon,
	213	const char from_name, const char to_name,
	214	struct cifs_sb_info *cifs_sb, __u32 access, int command)
35143eb5 PS	215	{
	216	__le16 *smb2_to_name = NULL;
	217	int rc;
	218
	219	smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb);
	220	if (smb2_to_name == NULL) {
	221	rc = -ENOMEM;
	222	goto smb2_rename_path;
	223	}
	224
568798cc	225	rc = smb2_open_op_close(xid, tcon, cifs_sb, from_name, access,
ca81983f	226	FILE_OPEN, 0, smb2_to_name, command);
35143eb5 PS	227	smb2_rename_path:
	228	kfree(smb2_to_name);
	229	return rc;
	230	}
568798cc PS	231
	232	int
	233	smb2_rename_path(const unsigned int xid, struct cifs_tcon *tcon,
	234	const char from_name, const char to_name,
	235	struct cifs_sb_info *cifs_sb)
	236	{
	237	return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
	238	DELETE, SMB2_OP_RENAME);
	239	}
	240
	241	int
	242	smb2_create_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
	243	const char from_name, const char to_name,
	244	struct cifs_sb_info *cifs_sb)
	245	{
	246	return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
	247	FILE_READ_ATTRIBUTES, SMB2_OP_HARDLINK);
	248	}
c839ff24 PS	249
	250	int
	251	smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon,
	252	const char *full_path, __u64 size,
	253	struct cifs_sb_info *cifs_sb, bool set_alloc)
	254	{
	255	__le64 eof = cpu_to_le64(size);
	256	return smb2_open_op_close(xid, tcon, cifs_sb, full_path,
ca81983f	257	FILE_WRITE_DATA, FILE_OPEN, 0, &eof,
c839ff24 PS	258	SMB2_OP_SET_EOF);
c839ff24 PS	259	}
1feeaac7 PS	260
	261	int
	262	smb2_set_file_info(struct inode inode, const char full_path,
	263	FILE_BASIC_INFO *buf, const unsigned int xid)
	264	{
	265	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
	266	struct tcon_link *tlink;
	267	int rc;
	268
18dd8e1a SF	269	if ((buf->CreationTime == 0) && (buf->LastAccessTime == 0) &&
	270	(buf->LastWriteTime == 0) && (buf->ChangeTime) &&
	271	(buf->Attributes == 0))
	272	return 0; /* would be a no op, no sense sending this */
	273
1feeaac7 PS	274	tlink = cifs_sb_tlink(cifs_sb);
	275	if (IS_ERR(tlink))
	276	return PTR_ERR(tlink);
18dd8e1a	277
1feeaac7	278	rc = smb2_open_op_close(xid, tlink_tcon(tlink), cifs_sb, full_path,
ca81983f	279	FILE_WRITE_ATTRIBUTES, FILE_OPEN, 0, buf,
1feeaac7 PS	280	SMB2_OP_SET_INFO);
	281	cifs_put_tlink(tlink);
	282	return rc;
	283	}