mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-30 13:38:40 +00:00
1873499e13
Pull security subsystem update from James Morris: "This is mostly maintenance updates across the subsystem, with a notable update for TPM 2.0, and addition of Jarkko Sakkinen as a maintainer of that" * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (40 commits) apparmor: clarify CRYPTO dependency selinux: Use a kmem_cache for allocation struct file_security_struct selinux: ioctl_has_perm should be static selinux: use sprintf return value selinux: use kstrdup() in security_get_bools() selinux: use kmemdup in security_sid_to_context_core() selinux: remove pointless cast in selinux_inode_setsecurity() selinux: introduce security_context_str_to_sid selinux: do not check open perm on ftruncate call selinux: change CONFIG_SECURITY_SELINUX_CHECKREQPROT_VALUE default KEYS: Merge the type-specific data with the payload data KEYS: Provide a script to extract a module signature KEYS: Provide a script to extract the sys cert list from a vmlinux file keys: Be more consistent in selection of union members used certs: add .gitignore to stop git nagging about x509_certificate_list KEYS: use kvfree() in add_key Smack: limited capability for changing process label TPM: remove unnecessary little endian conversion vTPM: support little endian guests char: Drop owner assignment from i2c_driver ...
2782 lines
76 KiB
C
2782 lines
76 KiB
C
/*
|
|
* fs/cifs/smb2pdu.c
|
|
*
|
|
* Copyright (C) International Business Machines Corp., 2009, 2013
|
|
* Etersoft, 2012
|
|
* Author(s): Steve French (sfrench@us.ibm.com)
|
|
* Pavel Shilovsky (pshilovsky@samba.org) 2012
|
|
*
|
|
* Contains the routines for constructing the SMB2 PDUs themselves
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
/* SMB2 PDU handling routines here - except for leftovers (eg session setup) */
|
|
/* Note that there are handle based routines which must be */
|
|
/* treated slightly differently for reconnection purposes since we never */
|
|
/* want to reuse a stale file handle and only the caller knows the file info */
|
|
|
|
#include <linux/fs.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/vfs.h>
|
|
#include <linux/task_io_accounting_ops.h>
|
|
#include <linux/uaccess.h>
|
|
#include <linux/pagemap.h>
|
|
#include <linux/xattr.h>
|
|
#include "smb2pdu.h"
|
|
#include "cifsglob.h"
|
|
#include "cifsacl.h"
|
|
#include "cifsproto.h"
|
|
#include "smb2proto.h"
|
|
#include "cifs_unicode.h"
|
|
#include "cifs_debug.h"
|
|
#include "ntlmssp.h"
|
|
#include "smb2status.h"
|
|
#include "smb2glob.h"
|
|
#include "cifspdu.h"
|
|
#include "cifs_spnego.h"
|
|
|
|
/*
|
|
* The following table defines the expected "StructureSize" of SMB2 requests
|
|
* in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests.
|
|
*
|
|
* Note that commands are defined in smb2pdu.h in le16 but the array below is
|
|
* indexed by command in host byte order.
|
|
*/
|
|
static const int smb2_req_struct_sizes[NUMBER_OF_SMB2_COMMANDS] = {
|
|
/* SMB2_NEGOTIATE */ 36,
|
|
/* SMB2_SESSION_SETUP */ 25,
|
|
/* SMB2_LOGOFF */ 4,
|
|
/* SMB2_TREE_CONNECT */ 9,
|
|
/* SMB2_TREE_DISCONNECT */ 4,
|
|
/* SMB2_CREATE */ 57,
|
|
/* SMB2_CLOSE */ 24,
|
|
/* SMB2_FLUSH */ 24,
|
|
/* SMB2_READ */ 49,
|
|
/* SMB2_WRITE */ 49,
|
|
/* SMB2_LOCK */ 48,
|
|
/* SMB2_IOCTL */ 57,
|
|
/* SMB2_CANCEL */ 4,
|
|
/* SMB2_ECHO */ 4,
|
|
/* SMB2_QUERY_DIRECTORY */ 33,
|
|
/* SMB2_CHANGE_NOTIFY */ 32,
|
|
/* SMB2_QUERY_INFO */ 41,
|
|
/* SMB2_SET_INFO */ 33,
|
|
/* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */
|
|
};
|
|
|
|
|
|
static void
|
|
smb2_hdr_assemble(struct smb2_hdr *hdr, __le16 smb2_cmd /* command */ ,
|
|
const struct cifs_tcon *tcon)
|
|
{
|
|
struct smb2_pdu *pdu = (struct smb2_pdu *)hdr;
|
|
char *temp = (char *)hdr;
|
|
/* lookup word count ie StructureSize from table */
|
|
__u16 parmsize = smb2_req_struct_sizes[le16_to_cpu(smb2_cmd)];
|
|
|
|
/*
|
|
* smaller than SMALL_BUFFER_SIZE but bigger than fixed area of
|
|
* largest operations (Create)
|
|
*/
|
|
memset(temp, 0, 256);
|
|
|
|
/* Note this is only network field converted to big endian */
|
|
hdr->smb2_buf_length = cpu_to_be32(parmsize + sizeof(struct smb2_hdr)
|
|
- 4 /* RFC 1001 length field itself not counted */);
|
|
|
|
hdr->ProtocolId[0] = 0xFE;
|
|
hdr->ProtocolId[1] = 'S';
|
|
hdr->ProtocolId[2] = 'M';
|
|
hdr->ProtocolId[3] = 'B';
|
|
hdr->StructureSize = cpu_to_le16(64);
|
|
hdr->Command = smb2_cmd;
|
|
hdr->CreditRequest = cpu_to_le16(2); /* BB make this dynamic */
|
|
hdr->ProcessId = cpu_to_le32((__u16)current->tgid);
|
|
|
|
if (!tcon)
|
|
goto out;
|
|
|
|
/* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */
|
|
/* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */
|
|
if ((tcon->ses) && (tcon->ses->server) &&
|
|
(tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
|
|
hdr->CreditCharge = cpu_to_le16(1);
|
|
/* else CreditCharge MBZ */
|
|
|
|
hdr->TreeId = tcon->tid;
|
|
/* Uid is not converted */
|
|
if (tcon->ses)
|
|
hdr->SessionId = tcon->ses->Suid;
|
|
|
|
/*
|
|
* If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have
|
|
* to pass the path on the Open SMB prefixed by \\server\share.
|
|
* Not sure when we would need to do the augmented path (if ever) and
|
|
* setting this flag breaks the SMB2 open operation since it is
|
|
* illegal to send an empty path name (without \\server\share prefix)
|
|
* when the DFS flag is set in the SMB open header. We could
|
|
* consider setting the flag on all operations other than open
|
|
* but it is safer to net set it for now.
|
|
*/
|
|
/* if (tcon->share_flags & SHI1005_FLAGS_DFS)
|
|
hdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */
|
|
|
|
if (tcon->ses && tcon->ses->server && tcon->ses->server->sign)
|
|
hdr->Flags |= SMB2_FLAGS_SIGNED;
|
|
out:
|
|
pdu->StructureSize2 = cpu_to_le16(parmsize);
|
|
return;
|
|
}
|
|
|
|
static int
|
|
smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon)
|
|
{
|
|
int rc = 0;
|
|
struct nls_table *nls_codepage;
|
|
struct cifs_ses *ses;
|
|
struct TCP_Server_Info *server;
|
|
|
|
/*
|
|
* SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
|
|
* check for tcp and smb session status done differently
|
|
* for those three - in the calling routine.
|
|
*/
|
|
if (tcon == NULL)
|
|
return rc;
|
|
|
|
if (smb2_command == SMB2_TREE_CONNECT)
|
|
return rc;
|
|
|
|
if (tcon->tidStatus == CifsExiting) {
|
|
/*
|
|
* only tree disconnect, open, and write,
|
|
* (and ulogoff which does not have tcon)
|
|
* are allowed as we start force umount.
|
|
*/
|
|
if ((smb2_command != SMB2_WRITE) &&
|
|
(smb2_command != SMB2_CREATE) &&
|
|
(smb2_command != SMB2_TREE_DISCONNECT)) {
|
|
cifs_dbg(FYI, "can not send cmd %d while umounting\n",
|
|
smb2_command);
|
|
return -ENODEV;
|
|
}
|
|
}
|
|
if ((!tcon->ses) || (tcon->ses->status == CifsExiting) ||
|
|
(!tcon->ses->server))
|
|
return -EIO;
|
|
|
|
ses = tcon->ses;
|
|
server = ses->server;
|
|
|
|
/*
|
|
* Give demultiplex thread up to 10 seconds to reconnect, should be
|
|
* greater than cifs socket timeout which is 7 seconds
|
|
*/
|
|
while (server->tcpStatus == CifsNeedReconnect) {
|
|
/*
|
|
* Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
|
|
* here since they are implicitly done when session drops.
|
|
*/
|
|
switch (smb2_command) {
|
|
/*
|
|
* BB Should we keep oplock break and add flush to exceptions?
|
|
*/
|
|
case SMB2_TREE_DISCONNECT:
|
|
case SMB2_CANCEL:
|
|
case SMB2_CLOSE:
|
|
case SMB2_OPLOCK_BREAK:
|
|
return -EAGAIN;
|
|
}
|
|
|
|
wait_event_interruptible_timeout(server->response_q,
|
|
(server->tcpStatus != CifsNeedReconnect), 10 * HZ);
|
|
|
|
/* are we still trying to reconnect? */
|
|
if (server->tcpStatus != CifsNeedReconnect)
|
|
break;
|
|
|
|
/*
|
|
* on "soft" mounts we wait once. Hard mounts keep
|
|
* retrying until process is killed or server comes
|
|
* back on-line
|
|
*/
|
|
if (!tcon->retry) {
|
|
cifs_dbg(FYI, "gave up waiting on reconnect in smb_init\n");
|
|
return -EHOSTDOWN;
|
|
}
|
|
}
|
|
|
|
if (!tcon->ses->need_reconnect && !tcon->need_reconnect)
|
|
return rc;
|
|
|
|
nls_codepage = load_nls_default();
|
|
|
|
/*
|
|
* need to prevent multiple threads trying to simultaneously reconnect
|
|
* the same SMB session
|
|
*/
|
|
mutex_lock(&tcon->ses->session_mutex);
|
|
rc = cifs_negotiate_protocol(0, tcon->ses);
|
|
if (!rc && tcon->ses->need_reconnect)
|
|
rc = cifs_setup_session(0, tcon->ses, nls_codepage);
|
|
|
|
if (rc || !tcon->need_reconnect) {
|
|
mutex_unlock(&tcon->ses->session_mutex);
|
|
goto out;
|
|
}
|
|
|
|
cifs_mark_open_files_invalid(tcon);
|
|
rc = SMB2_tcon(0, tcon->ses, tcon->treeName, tcon, nls_codepage);
|
|
mutex_unlock(&tcon->ses->session_mutex);
|
|
cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc);
|
|
if (rc)
|
|
goto out;
|
|
atomic_inc(&tconInfoReconnectCount);
|
|
out:
|
|
/*
|
|
* Check if handle based operation so we know whether we can continue
|
|
* or not without returning to caller to reset file handle.
|
|
*/
|
|
/*
|
|
* BB Is flush done by server on drop of tcp session? Should we special
|
|
* case it and skip above?
|
|
*/
|
|
switch (smb2_command) {
|
|
case SMB2_FLUSH:
|
|
case SMB2_READ:
|
|
case SMB2_WRITE:
|
|
case SMB2_LOCK:
|
|
case SMB2_IOCTL:
|
|
case SMB2_QUERY_DIRECTORY:
|
|
case SMB2_CHANGE_NOTIFY:
|
|
case SMB2_QUERY_INFO:
|
|
case SMB2_SET_INFO:
|
|
return -EAGAIN;
|
|
}
|
|
unload_nls(nls_codepage);
|
|
return rc;
|
|
}
|
|
|
|
/*
|
|
* Allocate and return pointer to an SMB request hdr, and set basic
|
|
* SMB information in the SMB header. If the return code is zero, this
|
|
* function must have filled in request_buf pointer.
|
|
*/
|
|
static int
|
|
small_smb2_init(__le16 smb2_command, struct cifs_tcon *tcon,
|
|
void **request_buf)
|
|
{
|
|
int rc = 0;
|
|
|
|
rc = smb2_reconnect(smb2_command, tcon);
|
|
if (rc)
|
|
return rc;
|
|
|
|
/* BB eventually switch this to SMB2 specific small buf size */
|
|
*request_buf = cifs_small_buf_get();
|
|
if (*request_buf == NULL) {
|
|
/* BB should we add a retry in here if not a writepage? */
|
|
return -ENOMEM;
|
|
}
|
|
|
|
smb2_hdr_assemble((struct smb2_hdr *) *request_buf, smb2_command, tcon);
|
|
|
|
if (tcon != NULL) {
|
|
#ifdef CONFIG_CIFS_STATS2
|
|
uint16_t com_code = le16_to_cpu(smb2_command);
|
|
cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]);
|
|
#endif
|
|
cifs_stats_inc(&tcon->num_smbs_sent);
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
#ifdef CONFIG_CIFS_SMB311
|
|
/* offset is sizeof smb2_negotiate_req - 4 but rounded up to 8 bytes */
|
|
#define OFFSET_OF_NEG_CONTEXT 0x68 /* sizeof(struct smb2_negotiate_req) - 4 */
|
|
|
|
|
|
#define SMB2_PREAUTH_INTEGRITY_CAPABILITIES cpu_to_le16(1)
|
|
#define SMB2_ENCRYPTION_CAPABILITIES cpu_to_le16(2)
|
|
|
|
static void
|
|
build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt)
|
|
{
|
|
pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
|
|
pneg_ctxt->DataLength = cpu_to_le16(38);
|
|
pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
|
|
pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
|
|
get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
|
|
pneg_ctxt->HashAlgorithms = SMB2_PREAUTH_INTEGRITY_SHA512;
|
|
}
|
|
|
|
static void
|
|
build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt)
|
|
{
|
|
pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
|
|
pneg_ctxt->DataLength = cpu_to_le16(6);
|
|
pneg_ctxt->CipherCount = cpu_to_le16(2);
|
|
pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM;
|
|
pneg_ctxt->Ciphers[1] = SMB2_ENCRYPTION_AES128_CCM;
|
|
}
|
|
|
|
static void
|
|
assemble_neg_contexts(struct smb2_negotiate_req *req)
|
|
{
|
|
|
|
/* +4 is to account for the RFC1001 len field */
|
|
char *pneg_ctxt = (char *)req + OFFSET_OF_NEG_CONTEXT + 4;
|
|
|
|
build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt);
|
|
/* Add 2 to size to round to 8 byte boundary */
|
|
pneg_ctxt += 2 + sizeof(struct smb2_preauth_neg_context);
|
|
build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt);
|
|
req->NegotiateContextOffset = cpu_to_le32(OFFSET_OF_NEG_CONTEXT);
|
|
req->NegotiateContextCount = cpu_to_le16(2);
|
|
inc_rfc1001_len(req, 4 + sizeof(struct smb2_preauth_neg_context) + 2
|
|
+ sizeof(struct smb2_encryption_neg_context)); /* calculate hash */
|
|
}
|
|
#else
|
|
static void assemble_neg_contexts(struct smb2_negotiate_req *req)
|
|
{
|
|
return;
|
|
}
|
|
#endif /* SMB311 */
|
|
|
|
|
|
/*
|
|
*
|
|
* SMB2 Worker functions follow:
|
|
*
|
|
* The general structure of the worker functions is:
|
|
* 1) Call smb2_init (assembles SMB2 header)
|
|
* 2) Initialize SMB2 command specific fields in fixed length area of SMB
|
|
* 3) Call smb_sendrcv2 (sends request on socket and waits for response)
|
|
* 4) Decode SMB2 command specific fields in the fixed length area
|
|
* 5) Decode variable length data area (if any for this SMB2 command type)
|
|
* 6) Call free smb buffer
|
|
* 7) return
|
|
*
|
|
*/
|
|
|
|
int
|
|
SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
|
|
{
|
|
struct smb2_negotiate_req *req;
|
|
struct smb2_negotiate_rsp *rsp;
|
|
struct kvec iov[1];
|
|
int rc = 0;
|
|
int resp_buftype;
|
|
struct TCP_Server_Info *server = ses->server;
|
|
int blob_offset, blob_length;
|
|
char *security_blob;
|
|
int flags = CIFS_NEG_OP;
|
|
|
|
cifs_dbg(FYI, "Negotiate protocol\n");
|
|
|
|
if (!server) {
|
|
WARN(1, "%s: server is NULL!\n", __func__);
|
|
return -EIO;
|
|
}
|
|
|
|
rc = small_smb2_init(SMB2_NEGOTIATE, NULL, (void **) &req);
|
|
if (rc)
|
|
return rc;
|
|
|
|
req->hdr.SessionId = 0;
|
|
|
|
req->Dialects[0] = cpu_to_le16(ses->server->vals->protocol_id);
|
|
|
|
req->DialectCount = cpu_to_le16(1); /* One vers= at a time for now */
|
|
inc_rfc1001_len(req, 2);
|
|
|
|
/* only one of SMB2 signing flags may be set in SMB2 request */
|
|
if (ses->sign)
|
|
req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
|
|
else if (global_secflags & CIFSSEC_MAY_SIGN)
|
|
req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
|
|
else
|
|
req->SecurityMode = 0;
|
|
|
|
req->Capabilities = cpu_to_le32(ses->server->vals->req_capabilities);
|
|
|
|
/* ClientGUID must be zero for SMB2.02 dialect */
|
|
if (ses->server->vals->protocol_id == SMB20_PROT_ID)
|
|
memset(req->ClientGUID, 0, SMB2_CLIENT_GUID_SIZE);
|
|
else {
|
|
memcpy(req->ClientGUID, server->client_guid,
|
|
SMB2_CLIENT_GUID_SIZE);
|
|
if (ses->server->vals->protocol_id == SMB311_PROT_ID)
|
|
assemble_neg_contexts(req);
|
|
}
|
|
iov[0].iov_base = (char *)req;
|
|
/* 4 for rfc1002 length field */
|
|
iov[0].iov_len = get_rfc1002_length(req) + 4;
|
|
|
|
rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags);
|
|
|
|
rsp = (struct smb2_negotiate_rsp *)iov[0].iov_base;
|
|
/*
|
|
* No tcon so can't do
|
|
* cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
|
|
*/
|
|
if (rc != 0)
|
|
goto neg_exit;
|
|
|
|
cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode);
|
|
|
|
/* BB we may eventually want to match the negotiated vs. requested
|
|
dialect, even though we are only requesting one at a time */
|
|
if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID))
|
|
cifs_dbg(FYI, "negotiated smb2.0 dialect\n");
|
|
else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID))
|
|
cifs_dbg(FYI, "negotiated smb2.1 dialect\n");
|
|
else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID))
|
|
cifs_dbg(FYI, "negotiated smb3.0 dialect\n");
|
|
else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID))
|
|
cifs_dbg(FYI, "negotiated smb3.02 dialect\n");
|
|
#ifdef CONFIG_CIFS_SMB311
|
|
else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID))
|
|
cifs_dbg(FYI, "negotiated smb3.1.1 dialect\n");
|
|
#endif /* SMB311 */
|
|
else {
|
|
cifs_dbg(VFS, "Illegal dialect returned by server 0x%x\n",
|
|
le16_to_cpu(rsp->DialectRevision));
|
|
rc = -EIO;
|
|
goto neg_exit;
|
|
}
|
|
server->dialect = le16_to_cpu(rsp->DialectRevision);
|
|
|
|
/* SMB2 only has an extended negflavor */
|
|
server->negflavor = CIFS_NEGFLAVOR_EXTENDED;
|
|
/* set it to the maximum buffer size value we can send with 1 credit */
|
|
server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize),
|
|
SMB2_MAX_BUFFER_SIZE);
|
|
server->max_read = le32_to_cpu(rsp->MaxReadSize);
|
|
server->max_write = le32_to_cpu(rsp->MaxWriteSize);
|
|
/* BB Do we need to validate the SecurityMode? */
|
|
server->sec_mode = le16_to_cpu(rsp->SecurityMode);
|
|
server->capabilities = le32_to_cpu(rsp->Capabilities);
|
|
/* Internal types */
|
|
server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES;
|
|
|
|
security_blob = smb2_get_data_area_len(&blob_offset, &blob_length,
|
|
&rsp->hdr);
|
|
/*
|
|
* See MS-SMB2 section 2.2.4: if no blob, client picks default which
|
|
* for us will be
|
|
* ses->sectype = RawNTLMSSP;
|
|
* but for time being this is our only auth choice so doesn't matter.
|
|
* We just found a server which sets blob length to zero expecting raw.
|
|
*/
|
|
if (blob_length == 0)
|
|
cifs_dbg(FYI, "missing security blob on negprot\n");
|
|
|
|
rc = cifs_enable_signing(server, ses->sign);
|
|
if (rc)
|
|
goto neg_exit;
|
|
if (blob_length) {
|
|
rc = decode_negTokenInit(security_blob, blob_length, server);
|
|
if (rc == 1)
|
|
rc = 0;
|
|
else if (rc == 0)
|
|
rc = -EIO;
|
|
}
|
|
neg_exit:
|
|
free_rsp_buf(resp_buftype, rsp);
|
|
return rc;
|
|
}
|
|
|
|
int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon)
|
|
{
|
|
int rc = 0;
|
|
struct validate_negotiate_info_req vneg_inbuf;
|
|
struct validate_negotiate_info_rsp *pneg_rsp;
|
|
u32 rsplen;
|
|
|
|
cifs_dbg(FYI, "validate negotiate\n");
|
|
|
|
/*
|
|
* validation ioctl must be signed, so no point sending this if we
|
|
* can not sign it. We could eventually change this to selectively
|
|
* sign just this, the first and only signed request on a connection.
|
|
* This is good enough for now since a user who wants better security
|
|
* would also enable signing on the mount. Having validation of
|
|
* negotiate info for signed connections helps reduce attack vectors
|
|
*/
|
|
if (tcon->ses->server->sign == false)
|
|
return 0; /* validation requires signing */
|
|
|
|
vneg_inbuf.Capabilities =
|
|
cpu_to_le32(tcon->ses->server->vals->req_capabilities);
|
|
memcpy(vneg_inbuf.Guid, tcon->ses->server->client_guid,
|
|
SMB2_CLIENT_GUID_SIZE);
|
|
|
|
if (tcon->ses->sign)
|
|
vneg_inbuf.SecurityMode =
|
|
cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
|
|
else if (global_secflags & CIFSSEC_MAY_SIGN)
|
|
vneg_inbuf.SecurityMode =
|
|
cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
|
|
else
|
|
vneg_inbuf.SecurityMode = 0;
|
|
|
|
vneg_inbuf.DialectCount = cpu_to_le16(1);
|
|
vneg_inbuf.Dialects[0] =
|
|
cpu_to_le16(tcon->ses->server->vals->protocol_id);
|
|
|
|
rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
|
|
FSCTL_VALIDATE_NEGOTIATE_INFO, true /* is_fsctl */,
|
|
(char *)&vneg_inbuf, sizeof(struct validate_negotiate_info_req),
|
|
(char **)&pneg_rsp, &rsplen);
|
|
|
|
if (rc != 0) {
|
|
cifs_dbg(VFS, "validate protocol negotiate failed: %d\n", rc);
|
|
return -EIO;
|
|
}
|
|
|
|
if (rsplen != sizeof(struct validate_negotiate_info_rsp)) {
|
|
cifs_dbg(VFS, "invalid size of protocol negotiate response\n");
|
|
return -EIO;
|
|
}
|
|
|
|
/* check validate negotiate info response matches what we got earlier */
|
|
if (pneg_rsp->Dialect !=
|
|
cpu_to_le16(tcon->ses->server->vals->protocol_id))
|
|
goto vneg_out;
|
|
|
|
if (pneg_rsp->SecurityMode != cpu_to_le16(tcon->ses->server->sec_mode))
|
|
goto vneg_out;
|
|
|
|
/* do not validate server guid because not saved at negprot time yet */
|
|
|
|
if ((le32_to_cpu(pneg_rsp->Capabilities) | SMB2_NT_FIND |
|
|
SMB2_LARGE_FILES) != tcon->ses->server->capabilities)
|
|
goto vneg_out;
|
|
|
|
/* validate negotiate successful */
|
|
cifs_dbg(FYI, "validate negotiate info successful\n");
|
|
return 0;
|
|
|
|
vneg_out:
|
|
cifs_dbg(VFS, "protocol revalidation - security settings mismatch\n");
|
|
return -EIO;
|
|
}
|
|
|
|
int
|
|
SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
|
|
const struct nls_table *nls_cp)
|
|
{
|
|
struct smb2_sess_setup_req *req;
|
|
struct smb2_sess_setup_rsp *rsp = NULL;
|
|
struct kvec iov[2];
|
|
int rc = 0;
|
|
int resp_buftype = CIFS_NO_BUFFER;
|
|
__le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */
|
|
struct TCP_Server_Info *server = ses->server;
|
|
u16 blob_length = 0;
|
|
struct key *spnego_key = NULL;
|
|
char *security_blob = NULL;
|
|
char *ntlmssp_blob = NULL;
|
|
bool use_spnego = false; /* else use raw ntlmssp */
|
|
|
|
cifs_dbg(FYI, "Session Setup\n");
|
|
|
|
if (!server) {
|
|
WARN(1, "%s: server is NULL!\n", __func__);
|
|
return -EIO;
|
|
}
|
|
|
|
/*
|
|
* If we are here due to reconnect, free per-smb session key
|
|
* in case signing was required.
|
|
*/
|
|
kfree(ses->auth_key.response);
|
|
ses->auth_key.response = NULL;
|
|
|
|
/*
|
|
* If memory allocation is successful, caller of this function
|
|
* frees it.
|
|
*/
|
|
ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
|
|
if (!ses->ntlmssp)
|
|
return -ENOMEM;
|
|
ses->ntlmssp->sesskey_per_smbsess = true;
|
|
|
|
/* FIXME: allow for other auth types besides NTLMSSP (e.g. krb5) */
|
|
if (ses->sectype != Kerberos && ses->sectype != RawNTLMSSP)
|
|
ses->sectype = RawNTLMSSP;
|
|
|
|
ssetup_ntlmssp_authenticate:
|
|
if (phase == NtLmChallenge)
|
|
phase = NtLmAuthenticate; /* if ntlmssp, now final phase */
|
|
|
|
rc = small_smb2_init(SMB2_SESSION_SETUP, NULL, (void **) &req);
|
|
if (rc)
|
|
return rc;
|
|
|
|
req->hdr.SessionId = 0; /* First session, not a reauthenticate */
|
|
req->Flags = 0; /* MBZ */
|
|
/* to enable echos and oplocks */
|
|
req->hdr.CreditRequest = cpu_to_le16(3);
|
|
|
|
/* only one of SMB2 signing flags may be set in SMB2 request */
|
|
if (server->sign)
|
|
req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED;
|
|
else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */
|
|
req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED;
|
|
else
|
|
req->SecurityMode = 0;
|
|
|
|
req->Capabilities = 0;
|
|
req->Channel = 0; /* MBZ */
|
|
|
|
iov[0].iov_base = (char *)req;
|
|
/* 4 for rfc1002 length field and 1 for pad */
|
|
iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
|
|
|
|
if (ses->sectype == Kerberos) {
|
|
#ifdef CONFIG_CIFS_UPCALL
|
|
struct cifs_spnego_msg *msg;
|
|
|
|
spnego_key = cifs_get_spnego_key(ses);
|
|
if (IS_ERR(spnego_key)) {
|
|
rc = PTR_ERR(spnego_key);
|
|
spnego_key = NULL;
|
|
goto ssetup_exit;
|
|
}
|
|
|
|
msg = spnego_key->payload.data[0];
|
|
/*
|
|
* check version field to make sure that cifs.upcall is
|
|
* sending us a response in an expected form
|
|
*/
|
|
if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) {
|
|
cifs_dbg(VFS,
|
|
"bad cifs.upcall version. Expected %d got %d",
|
|
CIFS_SPNEGO_UPCALL_VERSION, msg->version);
|
|
rc = -EKEYREJECTED;
|
|
goto ssetup_exit;
|
|
}
|
|
ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len,
|
|
GFP_KERNEL);
|
|
if (!ses->auth_key.response) {
|
|
cifs_dbg(VFS,
|
|
"Kerberos can't allocate (%u bytes) memory",
|
|
msg->sesskey_len);
|
|
rc = -ENOMEM;
|
|
goto ssetup_exit;
|
|
}
|
|
ses->auth_key.len = msg->sesskey_len;
|
|
blob_length = msg->secblob_len;
|
|
iov[1].iov_base = msg->data + msg->sesskey_len;
|
|
iov[1].iov_len = blob_length;
|
|
#else
|
|
rc = -EOPNOTSUPP;
|
|
goto ssetup_exit;
|
|
#endif /* CONFIG_CIFS_UPCALL */
|
|
} else if (phase == NtLmNegotiate) { /* if not krb5 must be ntlmssp */
|
|
ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE),
|
|
GFP_KERNEL);
|
|
if (ntlmssp_blob == NULL) {
|
|
rc = -ENOMEM;
|
|
goto ssetup_exit;
|
|
}
|
|
build_ntlmssp_negotiate_blob(ntlmssp_blob, ses);
|
|
if (use_spnego) {
|
|
/* blob_length = build_spnego_ntlmssp_blob(
|
|
&security_blob,
|
|
sizeof(struct _NEGOTIATE_MESSAGE),
|
|
ntlmssp_blob); */
|
|
/* BB eventually need to add this */
|
|
cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
|
|
rc = -EOPNOTSUPP;
|
|
kfree(ntlmssp_blob);
|
|
goto ssetup_exit;
|
|
} else {
|
|
blob_length = sizeof(struct _NEGOTIATE_MESSAGE);
|
|
/* with raw NTLMSSP we don't encapsulate in SPNEGO */
|
|
security_blob = ntlmssp_blob;
|
|
}
|
|
iov[1].iov_base = security_blob;
|
|
iov[1].iov_len = blob_length;
|
|
} else if (phase == NtLmAuthenticate) {
|
|
req->hdr.SessionId = ses->Suid;
|
|
ntlmssp_blob = kzalloc(sizeof(struct _NEGOTIATE_MESSAGE) + 500,
|
|
GFP_KERNEL);
|
|
if (ntlmssp_blob == NULL) {
|
|
rc = -ENOMEM;
|
|
goto ssetup_exit;
|
|
}
|
|
rc = build_ntlmssp_auth_blob(ntlmssp_blob, &blob_length, ses,
|
|
nls_cp);
|
|
if (rc) {
|
|
cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n",
|
|
rc);
|
|
goto ssetup_exit; /* BB double check error handling */
|
|
}
|
|
if (use_spnego) {
|
|
/* blob_length = build_spnego_ntlmssp_blob(
|
|
&security_blob,
|
|
blob_length,
|
|
ntlmssp_blob); */
|
|
cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
|
|
rc = -EOPNOTSUPP;
|
|
kfree(ntlmssp_blob);
|
|
goto ssetup_exit;
|
|
} else {
|
|
security_blob = ntlmssp_blob;
|
|
}
|
|
iov[1].iov_base = security_blob;
|
|
iov[1].iov_len = blob_length;
|
|
} else {
|
|
cifs_dbg(VFS, "illegal ntlmssp phase\n");
|
|
rc = -EIO;
|
|
goto ssetup_exit;
|
|
}
|
|
|
|
/* Testing shows that buffer offset must be at location of Buffer[0] */
|
|
req->SecurityBufferOffset =
|
|
cpu_to_le16(sizeof(struct smb2_sess_setup_req) -
|
|
1 /* pad */ - 4 /* rfc1001 len */);
|
|
req->SecurityBufferLength = cpu_to_le16(blob_length);
|
|
|
|
inc_rfc1001_len(req, blob_length - 1 /* pad */);
|
|
|
|
/* BB add code to build os and lm fields */
|
|
|
|
rc = SendReceive2(xid, ses, iov, 2, &resp_buftype,
|
|
CIFS_LOG_ERROR | CIFS_NEG_OP);
|
|
|
|
kfree(security_blob);
|
|
rsp = (struct smb2_sess_setup_rsp *)iov[0].iov_base;
|
|
ses->Suid = rsp->hdr.SessionId;
|
|
if (resp_buftype != CIFS_NO_BUFFER &&
|
|
rsp->hdr.Status == STATUS_MORE_PROCESSING_REQUIRED) {
|
|
if (phase != NtLmNegotiate) {
|
|
cifs_dbg(VFS, "Unexpected more processing error\n");
|
|
goto ssetup_exit;
|
|
}
|
|
if (offsetof(struct smb2_sess_setup_rsp, Buffer) - 4 !=
|
|
le16_to_cpu(rsp->SecurityBufferOffset)) {
|
|
cifs_dbg(VFS, "Invalid security buffer offset %d\n",
|
|
le16_to_cpu(rsp->SecurityBufferOffset));
|
|
rc = -EIO;
|
|
goto ssetup_exit;
|
|
}
|
|
|
|
/* NTLMSSP Negotiate sent now processing challenge (response) */
|
|
phase = NtLmChallenge; /* process ntlmssp challenge */
|
|
rc = 0; /* MORE_PROCESSING is not an error here but expected */
|
|
rc = decode_ntlmssp_challenge(rsp->Buffer,
|
|
le16_to_cpu(rsp->SecurityBufferLength), ses);
|
|
}
|
|
|
|
/*
|
|
* BB eventually add code for SPNEGO decoding of NtlmChallenge blob,
|
|
* but at least the raw NTLMSSP case works.
|
|
*/
|
|
/*
|
|
* No tcon so can't do
|
|
* cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
|
|
*/
|
|
if (rc != 0)
|
|
goto ssetup_exit;
|
|
|
|
ses->session_flags = le16_to_cpu(rsp->SessionFlags);
|
|
if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
|
|
cifs_dbg(VFS, "SMB3 encryption not supported yet\n");
|
|
ssetup_exit:
|
|
free_rsp_buf(resp_buftype, rsp);
|
|
|
|
/* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */
|
|
if ((phase == NtLmChallenge) && (rc == 0))
|
|
goto ssetup_ntlmssp_authenticate;
|
|
|
|
if (!rc) {
|
|
mutex_lock(&server->srv_mutex);
|
|
if (server->sign && server->ops->generate_signingkey) {
|
|
rc = server->ops->generate_signingkey(ses);
|
|
kfree(ses->auth_key.response);
|
|
ses->auth_key.response = NULL;
|
|
if (rc) {
|
|
cifs_dbg(FYI,
|
|
"SMB3 session key generation failed\n");
|
|
mutex_unlock(&server->srv_mutex);
|
|
goto keygen_exit;
|
|
}
|
|
}
|
|
if (!server->session_estab) {
|
|
server->sequence_number = 0x2;
|
|
server->session_estab = true;
|
|
}
|
|
mutex_unlock(&server->srv_mutex);
|
|
|
|
cifs_dbg(FYI, "SMB2/3 session established successfully\n");
|
|
spin_lock(&GlobalMid_Lock);
|
|
ses->status = CifsGood;
|
|
ses->need_reconnect = false;
|
|
spin_unlock(&GlobalMid_Lock);
|
|
}
|
|
|
|
keygen_exit:
|
|
if (!server->sign) {
|
|
kfree(ses->auth_key.response);
|
|
ses->auth_key.response = NULL;
|
|
}
|
|
if (spnego_key) {
|
|
key_invalidate(spnego_key);
|
|
key_put(spnego_key);
|
|
}
|
|
kfree(ses->ntlmssp);
|
|
|
|
return rc;
|
|
}
|
|
|
|
int
|
|
SMB2_logoff(const unsigned int xid, struct cifs_ses *ses)
|
|
{
|
|
struct smb2_logoff_req *req; /* response is also trivial struct */
|
|
int rc = 0;
|
|
struct TCP_Server_Info *server;
|
|
|
|
cifs_dbg(FYI, "disconnect session %p\n", ses);
|
|
|
|
if (ses && (ses->server))
|
|
server = ses->server;
|
|
else
|
|
return -EIO;
|
|
|
|
/* no need to send SMB logoff if uid already closed due to reconnect */
|
|
if (ses->need_reconnect)
|
|
goto smb2_session_already_dead;
|
|
|
|
rc = small_smb2_init(SMB2_LOGOFF, NULL, (void **) &req);
|
|
if (rc)
|
|
return rc;
|
|
|
|
/* since no tcon, smb2_init can not do this, so do here */
|
|
req->hdr.SessionId = ses->Suid;
|
|
if (server->sign)
|
|
req->hdr.Flags |= SMB2_FLAGS_SIGNED;
|
|
|
|
rc = SendReceiveNoRsp(xid, ses, (char *) &req->hdr, 0);
|
|
/*
|
|
* No tcon so can't do
|
|
* cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
|
|
*/
|
|
|
|
smb2_session_already_dead:
|
|
return rc;
|
|
}
|
|
|
|
static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code)
|
|
{
|
|
cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]);
|
|
}
|
|
|
|
#define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
|
|
|
|
/* These are similar values to what Windows uses */
|
|
static inline void init_copy_chunk_defaults(struct cifs_tcon *tcon)
|
|
{
|
|
tcon->max_chunks = 256;
|
|
tcon->max_bytes_chunk = 1048576;
|
|
tcon->max_bytes_copy = 16777216;
|
|
}
|
|
|
|
int
|
|
SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
|
|
struct cifs_tcon *tcon, const struct nls_table *cp)
|
|
{
|
|
struct smb2_tree_connect_req *req;
|
|
struct smb2_tree_connect_rsp *rsp = NULL;
|
|
struct kvec iov[2];
|
|
int rc = 0;
|
|
int resp_buftype;
|
|
int unc_path_len;
|
|
struct TCP_Server_Info *server;
|
|
__le16 *unc_path = NULL;
|
|
|
|
cifs_dbg(FYI, "TCON\n");
|
|
|
|
if ((ses->server) && tree)
|
|
server = ses->server;
|
|
else
|
|
return -EIO;
|
|
|
|
if (tcon && tcon->bad_network_name)
|
|
return -ENOENT;
|
|
|
|
if ((tcon && tcon->seal) &&
|
|
((ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) == 0)) {
|
|
cifs_dbg(VFS, "encryption requested but no server support");
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL);
|
|
if (unc_path == NULL)
|
|
return -ENOMEM;
|
|
|
|
unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1;
|
|
unc_path_len *= 2;
|
|
if (unc_path_len < 2) {
|
|
kfree(unc_path);
|
|
return -EINVAL;
|
|
}
|
|
|
|
rc = small_smb2_init(SMB2_TREE_CONNECT, tcon, (void **) &req);
|
|
if (rc) {
|
|
kfree(unc_path);
|
|
return rc;
|
|
}
|
|
|
|
if (tcon == NULL) {
|
|
/* since no tcon, smb2_init can not do this, so do here */
|
|
req->hdr.SessionId = ses->Suid;
|
|
/* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED)
|
|
req->hdr.Flags |= SMB2_FLAGS_SIGNED; */
|
|
}
|
|
|
|
iov[0].iov_base = (char *)req;
|
|
/* 4 for rfc1002 length field and 1 for pad */
|
|
iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
|
|
|
|
/* Testing shows that buffer offset must be at location of Buffer[0] */
|
|
req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req)
|
|
- 1 /* pad */ - 4 /* do not count rfc1001 len field */);
|
|
req->PathLength = cpu_to_le16(unc_path_len - 2);
|
|
iov[1].iov_base = unc_path;
|
|
iov[1].iov_len = unc_path_len;
|
|
|
|
inc_rfc1001_len(req, unc_path_len - 1 /* pad */);
|
|
|
|
rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0);
|
|
rsp = (struct smb2_tree_connect_rsp *)iov[0].iov_base;
|
|
|
|
if (rc != 0) {
|
|
if (tcon) {
|
|
cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE);
|
|
tcon->need_reconnect = true;
|
|
}
|
|
goto tcon_error_exit;
|
|
}
|
|
|
|
if (tcon == NULL) {
|
|
ses->ipc_tid = rsp->hdr.TreeId;
|
|
goto tcon_exit;
|
|
}
|
|
|
|
if (rsp->ShareType & SMB2_SHARE_TYPE_DISK)
|
|
cifs_dbg(FYI, "connection to disk share\n");
|
|
else if (rsp->ShareType & SMB2_SHARE_TYPE_PIPE) {
|
|
tcon->ipc = true;
|
|
cifs_dbg(FYI, "connection to pipe share\n");
|
|
} else if (rsp->ShareType & SMB2_SHARE_TYPE_PRINT) {
|
|
tcon->print = true;
|
|
cifs_dbg(FYI, "connection to printer\n");
|
|
} else {
|
|
cifs_dbg(VFS, "unknown share type %d\n", rsp->ShareType);
|
|
rc = -EOPNOTSUPP;
|
|
goto tcon_error_exit;
|
|
}
|
|
|
|
tcon->share_flags = le32_to_cpu(rsp->ShareFlags);
|
|
tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */
|
|
tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess);
|
|
tcon->tidStatus = CifsGood;
|
|
tcon->need_reconnect = false;
|
|
tcon->tid = rsp->hdr.TreeId;
|
|
strlcpy(tcon->treeName, tree, sizeof(tcon->treeName));
|
|
|
|
if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) &&
|
|
((tcon->share_flags & SHI1005_FLAGS_DFS) == 0))
|
|
cifs_dbg(VFS, "DFS capability contradicts DFS flag\n");
|
|
init_copy_chunk_defaults(tcon);
|
|
if (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA)
|
|
cifs_dbg(VFS, "Encrypted shares not supported");
|
|
if (tcon->ses->server->ops->validate_negotiate)
|
|
rc = tcon->ses->server->ops->validate_negotiate(xid, tcon);
|
|
tcon_exit:
|
|
free_rsp_buf(resp_buftype, rsp);
|
|
kfree(unc_path);
|
|
return rc;
|
|
|
|
tcon_error_exit:
|
|
if (rsp->hdr.Status == STATUS_BAD_NETWORK_NAME) {
|
|
cifs_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree);
|
|
if (tcon)
|
|
tcon->bad_network_name = true;
|
|
}
|
|
goto tcon_exit;
|
|
}
|
|
|
|
int
|
|
SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon)
|
|
{
|
|
struct smb2_tree_disconnect_req *req; /* response is trivial */
|
|
int rc = 0;
|
|
struct TCP_Server_Info *server;
|
|
struct cifs_ses *ses = tcon->ses;
|
|
|
|
cifs_dbg(FYI, "Tree Disconnect\n");
|
|
|
|
if (ses && (ses->server))
|
|
server = ses->server;
|
|
else
|
|
return -EIO;
|
|
|
|
if ((tcon->need_reconnect) || (tcon->ses->need_reconnect))
|
|
return 0;
|
|
|
|
rc = small_smb2_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req);
|
|
if (rc)
|
|
return rc;
|
|
|
|
rc = SendReceiveNoRsp(xid, ses, (char *)&req->hdr, 0);
|
|
if (rc)
|
|
cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE);
|
|
|
|
return rc;
|
|
}
|
|
|
|
|
|
static struct create_durable *
|
|
create_durable_buf(void)
|
|
{
|
|
struct create_durable *buf;
|
|
|
|
buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
|
|
if (!buf)
|
|
return NULL;
|
|
|
|
buf->ccontext.DataOffset = cpu_to_le16(offsetof
|
|
(struct create_durable, Data));
|
|
buf->ccontext.DataLength = cpu_to_le32(16);
|
|
buf->ccontext.NameOffset = cpu_to_le16(offsetof
|
|
(struct create_durable, Name));
|
|
buf->ccontext.NameLength = cpu_to_le16(4);
|
|
/* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */
|
|
buf->Name[0] = 'D';
|
|
buf->Name[1] = 'H';
|
|
buf->Name[2] = 'n';
|
|
buf->Name[3] = 'Q';
|
|
return buf;
|
|
}
|
|
|
|
static struct create_durable *
|
|
create_reconnect_durable_buf(struct cifs_fid *fid)
|
|
{
|
|
struct create_durable *buf;
|
|
|
|
buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
|
|
if (!buf)
|
|
return NULL;
|
|
|
|
buf->ccontext.DataOffset = cpu_to_le16(offsetof
|
|
(struct create_durable, Data));
|
|
buf->ccontext.DataLength = cpu_to_le32(16);
|
|
buf->ccontext.NameOffset = cpu_to_le16(offsetof
|
|
(struct create_durable, Name));
|
|
buf->ccontext.NameLength = cpu_to_le16(4);
|
|
buf->Data.Fid.PersistentFileId = fid->persistent_fid;
|
|
buf->Data.Fid.VolatileFileId = fid->volatile_fid;
|
|
/* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */
|
|
buf->Name[0] = 'D';
|
|
buf->Name[1] = 'H';
|
|
buf->Name[2] = 'n';
|
|
buf->Name[3] = 'C';
|
|
return buf;
|
|
}
|
|
|
|
static __u8
|
|
parse_lease_state(struct TCP_Server_Info *server, struct smb2_create_rsp *rsp,
|
|
unsigned int *epoch)
|
|
{
|
|
char *data_offset;
|
|
struct create_context *cc;
|
|
unsigned int next = 0;
|
|
char *name;
|
|
|
|
data_offset = (char *)rsp + 4 + le32_to_cpu(rsp->CreateContextsOffset);
|
|
cc = (struct create_context *)data_offset;
|
|
do {
|
|
cc = (struct create_context *)((char *)cc + next);
|
|
name = le16_to_cpu(cc->NameOffset) + (char *)cc;
|
|
if (le16_to_cpu(cc->NameLength) != 4 ||
|
|
strncmp(name, "RqLs", 4)) {
|
|
next = le32_to_cpu(cc->Next);
|
|
continue;
|
|
}
|
|
return server->ops->parse_lease_buf(cc, epoch);
|
|
} while (next != 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
add_lease_context(struct TCP_Server_Info *server, struct kvec *iov,
|
|
unsigned int *num_iovec, __u8 *oplock)
|
|
{
|
|
struct smb2_create_req *req = iov[0].iov_base;
|
|
unsigned int num = *num_iovec;
|
|
|
|
iov[num].iov_base = server->ops->create_lease_buf(oplock+1, *oplock);
|
|
if (iov[num].iov_base == NULL)
|
|
return -ENOMEM;
|
|
iov[num].iov_len = server->vals->create_lease_size;
|
|
req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
|
|
if (!req->CreateContextsOffset)
|
|
req->CreateContextsOffset = cpu_to_le32(
|
|
sizeof(struct smb2_create_req) - 4 +
|
|
iov[num - 1].iov_len);
|
|
le32_add_cpu(&req->CreateContextsLength,
|
|
server->vals->create_lease_size);
|
|
inc_rfc1001_len(&req->hdr, server->vals->create_lease_size);
|
|
*num_iovec = num + 1;
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
add_durable_context(struct kvec *iov, unsigned int *num_iovec,
|
|
struct cifs_open_parms *oparms)
|
|
{
|
|
struct smb2_create_req *req = iov[0].iov_base;
|
|
unsigned int num = *num_iovec;
|
|
|
|
if (oparms->reconnect) {
|
|
iov[num].iov_base = create_reconnect_durable_buf(oparms->fid);
|
|
/* indicate that we don't need to relock the file */
|
|
oparms->reconnect = false;
|
|
} else
|
|
iov[num].iov_base = create_durable_buf();
|
|
if (iov[num].iov_base == NULL)
|
|
return -ENOMEM;
|
|
iov[num].iov_len = sizeof(struct create_durable);
|
|
if (!req->CreateContextsOffset)
|
|
req->CreateContextsOffset =
|
|
cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
|
|
iov[1].iov_len);
|
|
le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable));
|
|
inc_rfc1001_len(&req->hdr, sizeof(struct create_durable));
|
|
*num_iovec = num + 1;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
|
|
__u8 *oplock, struct smb2_file_all_info *buf,
|
|
struct smb2_err_rsp **err_buf)
|
|
{
|
|
struct smb2_create_req *req;
|
|
struct smb2_create_rsp *rsp;
|
|
struct TCP_Server_Info *server;
|
|
struct cifs_tcon *tcon = oparms->tcon;
|
|
struct cifs_ses *ses = tcon->ses;
|
|
struct kvec iov[4];
|
|
int resp_buftype;
|
|
int uni_path_len;
|
|
__le16 *copy_path = NULL;
|
|
int copy_size;
|
|
int rc = 0;
|
|
unsigned int num_iovecs = 2;
|
|
__u32 file_attributes = 0;
|
|
char *dhc_buf = NULL, *lc_buf = NULL;
|
|
|
|
cifs_dbg(FYI, "create/open\n");
|
|
|
|
if (ses && (ses->server))
|
|
server = ses->server;
|
|
else
|
|
return -EIO;
|
|
|
|
rc = small_smb2_init(SMB2_CREATE, tcon, (void **) &req);
|
|
if (rc)
|
|
return rc;
|
|
|
|
if (oparms->create_options & CREATE_OPTION_READONLY)
|
|
file_attributes |= ATTR_READONLY;
|
|
if (oparms->create_options & CREATE_OPTION_SPECIAL)
|
|
file_attributes |= ATTR_SYSTEM;
|
|
|
|
req->ImpersonationLevel = IL_IMPERSONATION;
|
|
req->DesiredAccess = cpu_to_le32(oparms->desired_access);
|
|
/* File attributes ignored on open (used in create though) */
|
|
req->FileAttributes = cpu_to_le32(file_attributes);
|
|
req->ShareAccess = FILE_SHARE_ALL_LE;
|
|
req->CreateDisposition = cpu_to_le32(oparms->disposition);
|
|
req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK);
|
|
uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2;
|
|
/* do not count rfc1001 len field */
|
|
req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req) - 4);
|
|
|
|
iov[0].iov_base = (char *)req;
|
|
/* 4 for rfc1002 length field */
|
|
iov[0].iov_len = get_rfc1002_length(req) + 4;
|
|
|
|
/* MUST set path len (NameLength) to 0 opening root of share */
|
|
req->NameLength = cpu_to_le16(uni_path_len - 2);
|
|
/* -1 since last byte is buf[0] which is sent below (path) */
|
|
iov[0].iov_len--;
|
|
if (uni_path_len % 8 != 0) {
|
|
copy_size = uni_path_len / 8 * 8;
|
|
if (copy_size < uni_path_len)
|
|
copy_size += 8;
|
|
|
|
copy_path = kzalloc(copy_size, GFP_KERNEL);
|
|
if (!copy_path)
|
|
return -ENOMEM;
|
|
memcpy((char *)copy_path, (const char *)path,
|
|
uni_path_len);
|
|
uni_path_len = copy_size;
|
|
path = copy_path;
|
|
}
|
|
|
|
iov[1].iov_len = uni_path_len;
|
|
iov[1].iov_base = path;
|
|
/* -1 since last byte is buf[0] which was counted in smb2_buf_len */
|
|
inc_rfc1001_len(req, uni_path_len - 1);
|
|
|
|
if (!server->oplocks)
|
|
*oplock = SMB2_OPLOCK_LEVEL_NONE;
|
|
|
|
if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) ||
|
|
*oplock == SMB2_OPLOCK_LEVEL_NONE)
|
|
req->RequestedOplockLevel = *oplock;
|
|
else {
|
|
rc = add_lease_context(server, iov, &num_iovecs, oplock);
|
|
if (rc) {
|
|
cifs_small_buf_release(req);
|
|
kfree(copy_path);
|
|
return rc;
|
|
}
|
|
lc_buf = iov[num_iovecs-1].iov_base;
|
|
}
|
|
|
|
if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) {
|
|
/* need to set Next field of lease context if we request it */
|
|
if (server->capabilities & SMB2_GLOBAL_CAP_LEASING) {
|
|
struct create_context *ccontext =
|
|
(struct create_context *)iov[num_iovecs-1].iov_base;
|
|
ccontext->Next =
|
|
cpu_to_le32(server->vals->create_lease_size);
|
|
}
|
|
rc = add_durable_context(iov, &num_iovecs, oparms);
|
|
if (rc) {
|
|
cifs_small_buf_release(req);
|
|
kfree(copy_path);
|
|
kfree(lc_buf);
|
|
return rc;
|
|
}
|
|
dhc_buf = iov[num_iovecs-1].iov_base;
|
|
}
|
|
|
|
rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0);
|
|
rsp = (struct smb2_create_rsp *)iov[0].iov_base;
|
|
|
|
if (rc != 0) {
|
|
cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
|
|
if (err_buf)
|
|
*err_buf = kmemdup(rsp, get_rfc1002_length(rsp) + 4,
|
|
GFP_KERNEL);
|
|
goto creat_exit;
|
|
}
|
|
|
|
oparms->fid->persistent_fid = rsp->PersistentFileId;
|
|
oparms->fid->volatile_fid = rsp->VolatileFileId;
|
|
|
|
if (buf) {
|
|
memcpy(buf, &rsp->CreationTime, 32);
|
|
buf->AllocationSize = rsp->AllocationSize;
|
|
buf->EndOfFile = rsp->EndofFile;
|
|
buf->Attributes = rsp->FileAttributes;
|
|
buf->NumberOfLinks = cpu_to_le32(1);
|
|
buf->DeletePending = 0;
|
|
}
|
|
|
|
if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE)
|
|
*oplock = parse_lease_state(server, rsp, &oparms->fid->epoch);
|
|
else
|
|
*oplock = rsp->OplockLevel;
|
|
creat_exit:
|
|
kfree(copy_path);
|
|
kfree(lc_buf);
|
|
kfree(dhc_buf);
|
|
free_rsp_buf(resp_buftype, rsp);
|
|
return rc;
|
|
}
|
|
|
|
/*
|
|
* SMB2 IOCTL is used for both IOCTLs and FSCTLs
|
|
*/
|
|
int
|
|
SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
|
|
u64 volatile_fid, u32 opcode, bool is_fsctl, char *in_data,
|
|
u32 indatalen, char **out_data, u32 *plen /* returned data len */)
|
|
{
|
|
struct smb2_ioctl_req *req;
|
|
struct smb2_ioctl_rsp *rsp;
|
|
struct TCP_Server_Info *server;
|
|
struct cifs_ses *ses;
|
|
struct kvec iov[2];
|
|
int resp_buftype;
|
|
int num_iovecs;
|
|
int rc = 0;
|
|
|
|
cifs_dbg(FYI, "SMB2 IOCTL\n");
|
|
|
|
if (out_data != NULL)
|
|
*out_data = NULL;
|
|
|
|
/* zero out returned data len, in case of error */
|
|
if (plen)
|
|
*plen = 0;
|
|
|
|
if (tcon)
|
|
ses = tcon->ses;
|
|
else
|
|
return -EIO;
|
|
|
|
if (ses && (ses->server))
|
|
server = ses->server;
|
|
else
|
|
return -EIO;
|
|
|
|
rc = small_smb2_init(SMB2_IOCTL, tcon, (void **) &req);
|
|
if (rc)
|
|
return rc;
|
|
|
|
req->CtlCode = cpu_to_le32(opcode);
|
|
req->PersistentFileId = persistent_fid;
|
|
req->VolatileFileId = volatile_fid;
|
|
|
|
if (indatalen) {
|
|
req->InputCount = cpu_to_le32(indatalen);
|
|
/* do not set InputOffset if no input data */
|
|
req->InputOffset =
|
|
cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer) - 4);
|
|
iov[1].iov_base = in_data;
|
|
iov[1].iov_len = indatalen;
|
|
num_iovecs = 2;
|
|
} else
|
|
num_iovecs = 1;
|
|
|
|
req->OutputOffset = 0;
|
|
req->OutputCount = 0; /* MBZ */
|
|
|
|
/*
|
|
* Could increase MaxOutputResponse, but that would require more
|
|
* than one credit. Windows typically sets this smaller, but for some
|
|
* ioctls it may be useful to allow server to send more. No point
|
|
* limiting what the server can send as long as fits in one credit
|
|
*/
|
|
req->MaxOutputResponse = cpu_to_le32(0xFF00); /* < 64K uses 1 credit */
|
|
|
|
if (is_fsctl)
|
|
req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL);
|
|
else
|
|
req->Flags = 0;
|
|
|
|
iov[0].iov_base = (char *)req;
|
|
|
|
/*
|
|
* If no input data, the size of ioctl struct in
|
|
* protocol spec still includes a 1 byte data buffer,
|
|
* but if input data passed to ioctl, we do not
|
|
* want to double count this, so we do not send
|
|
* the dummy one byte of data in iovec[0] if sending
|
|
* input data (in iovec[1]). We also must add 4 bytes
|
|
* in first iovec to allow for rfc1002 length field.
|
|
*/
|
|
|
|
if (indatalen) {
|
|
iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
|
|
inc_rfc1001_len(req, indatalen - 1);
|
|
} else
|
|
iov[0].iov_len = get_rfc1002_length(req) + 4;
|
|
|
|
|
|
rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0);
|
|
rsp = (struct smb2_ioctl_rsp *)iov[0].iov_base;
|
|
|
|
if ((rc != 0) && (rc != -EINVAL)) {
|
|
cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
|
|
goto ioctl_exit;
|
|
} else if (rc == -EINVAL) {
|
|
if ((opcode != FSCTL_SRV_COPYCHUNK_WRITE) &&
|
|
(opcode != FSCTL_SRV_COPYCHUNK)) {
|
|
cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
|
|
goto ioctl_exit;
|
|
}
|
|
}
|
|
|
|
/* check if caller wants to look at return data or just return rc */
|
|
if ((plen == NULL) || (out_data == NULL))
|
|
goto ioctl_exit;
|
|
|
|
*plen = le32_to_cpu(rsp->OutputCount);
|
|
|
|
/* We check for obvious errors in the output buffer length and offset */
|
|
if (*plen == 0)
|
|
goto ioctl_exit; /* server returned no data */
|
|
else if (*plen > 0xFF00) {
|
|
cifs_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen);
|
|
*plen = 0;
|
|
rc = -EIO;
|
|
goto ioctl_exit;
|
|
}
|
|
|
|
if (get_rfc1002_length(rsp) < le32_to_cpu(rsp->OutputOffset) + *plen) {
|
|
cifs_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen,
|
|
le32_to_cpu(rsp->OutputOffset));
|
|
*plen = 0;
|
|
rc = -EIO;
|
|
goto ioctl_exit;
|
|
}
|
|
|
|
*out_data = kmalloc(*plen, GFP_KERNEL);
|
|
if (*out_data == NULL) {
|
|
rc = -ENOMEM;
|
|
goto ioctl_exit;
|
|
}
|
|
|
|
memcpy(*out_data, rsp->hdr.ProtocolId + le32_to_cpu(rsp->OutputOffset),
|
|
*plen);
|
|
ioctl_exit:
|
|
free_rsp_buf(resp_buftype, rsp);
|
|
return rc;
|
|
}
|
|
|
|
/*
|
|
* Individual callers to ioctl worker function follow
|
|
*/
|
|
|
|
int
|
|
SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
|
|
u64 persistent_fid, u64 volatile_fid)
|
|
{
|
|
int rc;
|
|
struct compress_ioctl fsctl_input;
|
|
char *ret_data = NULL;
|
|
|
|
fsctl_input.CompressionState =
|
|
cpu_to_le16(COMPRESSION_FORMAT_DEFAULT);
|
|
|
|
rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
|
|
FSCTL_SET_COMPRESSION, true /* is_fsctl */,
|
|
(char *)&fsctl_input /* data input */,
|
|
2 /* in data len */, &ret_data /* out data */, NULL);
|
|
|
|
cifs_dbg(FYI, "set compression rc %d\n", rc);
|
|
|
|
return rc;
|
|
}
|
|
|
|
int
|
|
SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
|
|
u64 persistent_fid, u64 volatile_fid)
|
|
{
|
|
struct smb2_close_req *req;
|
|
struct smb2_close_rsp *rsp;
|
|
struct TCP_Server_Info *server;
|
|
struct cifs_ses *ses = tcon->ses;
|
|
struct kvec iov[1];
|
|
int resp_buftype;
|
|
int rc = 0;
|
|
|
|
cifs_dbg(FYI, "Close\n");
|
|
|
|
if (ses && (ses->server))
|
|
server = ses->server;
|
|
else
|
|
return -EIO;
|
|
|
|
rc = small_smb2_init(SMB2_CLOSE, tcon, (void **) &req);
|
|
if (rc)
|
|
return rc;
|
|
|
|
req->PersistentFileId = persistent_fid;
|
|
req->VolatileFileId = volatile_fid;
|
|
|
|
iov[0].iov_base = (char *)req;
|
|
/* 4 for rfc1002 length field */
|
|
iov[0].iov_len = get_rfc1002_length(req) + 4;
|
|
|
|
rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
|
|
rsp = (struct smb2_close_rsp *)iov[0].iov_base;
|
|
|
|
if (rc != 0) {
|
|
cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE);
|
|
goto close_exit;
|
|
}
|
|
|
|
/* BB FIXME - decode close response, update inode for caching */
|
|
|
|
close_exit:
|
|
free_rsp_buf(resp_buftype, rsp);
|
|
return rc;
|
|
}
|
|
|
|
static int
|
|
validate_buf(unsigned int offset, unsigned int buffer_length,
|
|
struct smb2_hdr *hdr, unsigned int min_buf_size)
|
|
|
|
{
|
|
unsigned int smb_len = be32_to_cpu(hdr->smb2_buf_length);
|
|
char *end_of_smb = smb_len + 4 /* RFC1001 length field */ + (char *)hdr;
|
|
char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
|
|
char *end_of_buf = begin_of_buf + buffer_length;
|
|
|
|
|
|
if (buffer_length < min_buf_size) {
|
|
cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n",
|
|
buffer_length, min_buf_size);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* check if beyond RFC1001 maximum length */
|
|
if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) {
|
|
cifs_dbg(VFS, "buffer length %d or smb length %d too large\n",
|
|
buffer_length, smb_len);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) {
|
|
cifs_dbg(VFS, "illegal server response, bad offset to data\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* If SMB buffer fields are valid, copy into temporary buffer to hold result.
|
|
* Caller must free buffer.
|
|
*/
|
|
static int
|
|
validate_and_copy_buf(unsigned int offset, unsigned int buffer_length,
|
|
struct smb2_hdr *hdr, unsigned int minbufsize,
|
|
char *data)
|
|
|
|
{
|
|
char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
|
|
int rc;
|
|
|
|
if (!data)
|
|
return -EINVAL;
|
|
|
|
rc = validate_buf(offset, buffer_length, hdr, minbufsize);
|
|
if (rc)
|
|
return rc;
|
|
|
|
memcpy(data, begin_of_buf, buffer_length);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
query_info(const unsigned int xid, struct cifs_tcon *tcon,
|
|
u64 persistent_fid, u64 volatile_fid, u8 info_class,
|
|
size_t output_len, size_t min_len, void *data)
|
|
{
|
|
struct smb2_query_info_req *req;
|
|
struct smb2_query_info_rsp *rsp = NULL;
|
|
struct kvec iov[2];
|
|
int rc = 0;
|
|
int resp_buftype;
|
|
struct TCP_Server_Info *server;
|
|
struct cifs_ses *ses = tcon->ses;
|
|
|
|
cifs_dbg(FYI, "Query Info\n");
|
|
|
|
if (ses && (ses->server))
|
|
server = ses->server;
|
|
else
|
|
return -EIO;
|
|
|
|
rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
|
|
if (rc)
|
|
return rc;
|
|
|
|
req->InfoType = SMB2_O_INFO_FILE;
|
|
req->FileInfoClass = info_class;
|
|
req->PersistentFileId = persistent_fid;
|
|
req->VolatileFileId = volatile_fid;
|
|
/* 4 for rfc1002 length field and 1 for Buffer */
|
|
req->InputBufferOffset =
|
|
cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
|
|
req->OutputBufferLength = cpu_to_le32(output_len);
|
|
|
|
iov[0].iov_base = (char *)req;
|
|
/* 4 for rfc1002 length field */
|
|
iov[0].iov_len = get_rfc1002_length(req) + 4;
|
|
|
|
rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
|
|
rsp = (struct smb2_query_info_rsp *)iov[0].iov_base;
|
|
|
|
if (rc) {
|
|
cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
|
|
goto qinf_exit;
|
|
}
|
|
|
|
rc = validate_and_copy_buf(le16_to_cpu(rsp->OutputBufferOffset),
|
|
le32_to_cpu(rsp->OutputBufferLength),
|
|
&rsp->hdr, min_len, data);
|
|
|
|
qinf_exit:
|
|
free_rsp_buf(resp_buftype, rsp);
|
|
return rc;
|
|
}
|
|
|
|
int
|
|
SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
|
|
u64 persistent_fid, u64 volatile_fid,
|
|
struct smb2_file_all_info *data)
|
|
{
|
|
return query_info(xid, tcon, persistent_fid, volatile_fid,
|
|
FILE_ALL_INFORMATION,
|
|
sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
|
|
sizeof(struct smb2_file_all_info), data);
|
|
}
|
|
|
|
int
|
|
SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon,
|
|
u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid)
|
|
{
|
|
return query_info(xid, tcon, persistent_fid, volatile_fid,
|
|
FILE_INTERNAL_INFORMATION,
|
|
sizeof(struct smb2_file_internal_info),
|
|
sizeof(struct smb2_file_internal_info), uniqueid);
|
|
}
|
|
|
|
/*
|
|
* This is a no-op for now. We're not really interested in the reply, but
|
|
* rather in the fact that the server sent one and that server->lstrp
|
|
* gets updated.
|
|
*
|
|
* FIXME: maybe we should consider checking that the reply matches request?
|
|
*/
|
|
static void
|
|
smb2_echo_callback(struct mid_q_entry *mid)
|
|
{
|
|
struct TCP_Server_Info *server = mid->callback_data;
|
|
struct smb2_echo_rsp *smb2 = (struct smb2_echo_rsp *)mid->resp_buf;
|
|
unsigned int credits_received = 1;
|
|
|
|
if (mid->mid_state == MID_RESPONSE_RECEIVED)
|
|
credits_received = le16_to_cpu(smb2->hdr.CreditRequest);
|
|
|
|
mutex_lock(&server->srv_mutex);
|
|
DeleteMidQEntry(mid);
|
|
mutex_unlock(&server->srv_mutex);
|
|
add_credits(server, credits_received, CIFS_ECHO_OP);
|
|
}
|
|
|
|
int
|
|
SMB2_echo(struct TCP_Server_Info *server)
|
|
{
|
|
struct smb2_echo_req *req;
|
|
int rc = 0;
|
|
struct kvec iov;
|
|
struct smb_rqst rqst = { .rq_iov = &iov,
|
|
.rq_nvec = 1 };
|
|
|
|
cifs_dbg(FYI, "In echo request\n");
|
|
|
|
rc = small_smb2_init(SMB2_ECHO, NULL, (void **)&req);
|
|
if (rc)
|
|
return rc;
|
|
|
|
req->hdr.CreditRequest = cpu_to_le16(1);
|
|
|
|
iov.iov_base = (char *)req;
|
|
/* 4 for rfc1002 length field */
|
|
iov.iov_len = get_rfc1002_length(req) + 4;
|
|
|
|
rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, server,
|
|
CIFS_ECHO_OP);
|
|
if (rc)
|
|
cifs_dbg(FYI, "Echo request failed: %d\n", rc);
|
|
|
|
cifs_small_buf_release(req);
|
|
return rc;
|
|
}
|
|
|
|
int
|
|
SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
|
|
u64 volatile_fid)
|
|
{
|
|
struct smb2_flush_req *req;
|
|
struct TCP_Server_Info *server;
|
|
struct cifs_ses *ses = tcon->ses;
|
|
struct kvec iov[1];
|
|
int resp_buftype;
|
|
int rc = 0;
|
|
|
|
cifs_dbg(FYI, "Flush\n");
|
|
|
|
if (ses && (ses->server))
|
|
server = ses->server;
|
|
else
|
|
return -EIO;
|
|
|
|
rc = small_smb2_init(SMB2_FLUSH, tcon, (void **) &req);
|
|
if (rc)
|
|
return rc;
|
|
|
|
req->PersistentFileId = persistent_fid;
|
|
req->VolatileFileId = volatile_fid;
|
|
|
|
iov[0].iov_base = (char *)req;
|
|
/* 4 for rfc1002 length field */
|
|
iov[0].iov_len = get_rfc1002_length(req) + 4;
|
|
|
|
rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
|
|
|
|
if (rc != 0)
|
|
cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE);
|
|
|
|
free_rsp_buf(resp_buftype, iov[0].iov_base);
|
|
return rc;
|
|
}
|
|
|
|
/*
|
|
* To form a chain of read requests, any read requests after the first should
|
|
* have the end_of_chain boolean set to true.
|
|
*/
|
|
static int
|
|
smb2_new_read_req(struct kvec *iov, struct cifs_io_parms *io_parms,
|
|
unsigned int remaining_bytes, int request_type)
|
|
{
|
|
int rc = -EACCES;
|
|
struct smb2_read_req *req = NULL;
|
|
|
|
rc = small_smb2_init(SMB2_READ, io_parms->tcon, (void **) &req);
|
|
if (rc)
|
|
return rc;
|
|
if (io_parms->tcon->ses->server == NULL)
|
|
return -ECONNABORTED;
|
|
|
|
req->hdr.ProcessId = cpu_to_le32(io_parms->pid);
|
|
|
|
req->PersistentFileId = io_parms->persistent_fid;
|
|
req->VolatileFileId = io_parms->volatile_fid;
|
|
req->ReadChannelInfoOffset = 0; /* reserved */
|
|
req->ReadChannelInfoLength = 0; /* reserved */
|
|
req->Channel = 0; /* reserved */
|
|
req->MinimumCount = 0;
|
|
req->Length = cpu_to_le32(io_parms->length);
|
|
req->Offset = cpu_to_le64(io_parms->offset);
|
|
|
|
if (request_type & CHAINED_REQUEST) {
|
|
if (!(request_type & END_OF_CHAIN)) {
|
|
/* 4 for rfc1002 length field */
|
|
req->hdr.NextCommand =
|
|
cpu_to_le32(get_rfc1002_length(req) + 4);
|
|
} else /* END_OF_CHAIN */
|
|
req->hdr.NextCommand = 0;
|
|
if (request_type & RELATED_REQUEST) {
|
|
req->hdr.Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
|
|
/*
|
|
* Related requests use info from previous read request
|
|
* in chain.
|
|
*/
|
|
req->hdr.SessionId = 0xFFFFFFFF;
|
|
req->hdr.TreeId = 0xFFFFFFFF;
|
|
req->PersistentFileId = 0xFFFFFFFF;
|
|
req->VolatileFileId = 0xFFFFFFFF;
|
|
}
|
|
}
|
|
if (remaining_bytes > io_parms->length)
|
|
req->RemainingBytes = cpu_to_le32(remaining_bytes);
|
|
else
|
|
req->RemainingBytes = 0;
|
|
|
|
iov[0].iov_base = (char *)req;
|
|
/* 4 for rfc1002 length field */
|
|
iov[0].iov_len = get_rfc1002_length(req) + 4;
|
|
return rc;
|
|
}
|
|
|
|
static void
|
|
smb2_readv_callback(struct mid_q_entry *mid)
|
|
{
|
|
struct cifs_readdata *rdata = mid->callback_data;
|
|
struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
|
|
struct TCP_Server_Info *server = tcon->ses->server;
|
|
struct smb2_hdr *buf = (struct smb2_hdr *)rdata->iov.iov_base;
|
|
unsigned int credits_received = 1;
|
|
struct smb_rqst rqst = { .rq_iov = &rdata->iov,
|
|
.rq_nvec = 1,
|
|
.rq_pages = rdata->pages,
|
|
.rq_npages = rdata->nr_pages,
|
|
.rq_pagesz = rdata->pagesz,
|
|
.rq_tailsz = rdata->tailsz };
|
|
|
|
cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n",
|
|
__func__, mid->mid, mid->mid_state, rdata->result,
|
|
rdata->bytes);
|
|
|
|
switch (mid->mid_state) {
|
|
case MID_RESPONSE_RECEIVED:
|
|
credits_received = le16_to_cpu(buf->CreditRequest);
|
|
/* result already set, check signature */
|
|
if (server->sign) {
|
|
int rc;
|
|
|
|
rc = smb2_verify_signature(&rqst, server);
|
|
if (rc)
|
|
cifs_dbg(VFS, "SMB signature verification returned error = %d\n",
|
|
rc);
|
|
}
|
|
/* FIXME: should this be counted toward the initiating task? */
|
|
task_io_account_read(rdata->got_bytes);
|
|
cifs_stats_bytes_read(tcon, rdata->got_bytes);
|
|
break;
|
|
case MID_REQUEST_SUBMITTED:
|
|
case MID_RETRY_NEEDED:
|
|
rdata->result = -EAGAIN;
|
|
if (server->sign && rdata->got_bytes)
|
|
/* reset bytes number since we can not check a sign */
|
|
rdata->got_bytes = 0;
|
|
/* FIXME: should this be counted toward the initiating task? */
|
|
task_io_account_read(rdata->got_bytes);
|
|
cifs_stats_bytes_read(tcon, rdata->got_bytes);
|
|
break;
|
|
default:
|
|
if (rdata->result != -ENODATA)
|
|
rdata->result = -EIO;
|
|
}
|
|
|
|
if (rdata->result)
|
|
cifs_stats_fail_inc(tcon, SMB2_READ_HE);
|
|
|
|
queue_work(cifsiod_wq, &rdata->work);
|
|
mutex_lock(&server->srv_mutex);
|
|
DeleteMidQEntry(mid);
|
|
mutex_unlock(&server->srv_mutex);
|
|
add_credits(server, credits_received, 0);
|
|
}
|
|
|
|
/* smb2_async_readv - send an async write, and set up mid to handle result */
|
|
int
|
|
smb2_async_readv(struct cifs_readdata *rdata)
|
|
{
|
|
int rc, flags = 0;
|
|
struct smb2_hdr *buf;
|
|
struct cifs_io_parms io_parms;
|
|
struct smb_rqst rqst = { .rq_iov = &rdata->iov,
|
|
.rq_nvec = 1 };
|
|
struct TCP_Server_Info *server;
|
|
|
|
cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n",
|
|
__func__, rdata->offset, rdata->bytes);
|
|
|
|
io_parms.tcon = tlink_tcon(rdata->cfile->tlink);
|
|
io_parms.offset = rdata->offset;
|
|
io_parms.length = rdata->bytes;
|
|
io_parms.persistent_fid = rdata->cfile->fid.persistent_fid;
|
|
io_parms.volatile_fid = rdata->cfile->fid.volatile_fid;
|
|
io_parms.pid = rdata->pid;
|
|
|
|
server = io_parms.tcon->ses->server;
|
|
|
|
rc = smb2_new_read_req(&rdata->iov, &io_parms, 0, 0);
|
|
if (rc) {
|
|
if (rc == -EAGAIN && rdata->credits) {
|
|
/* credits was reset by reconnect */
|
|
rdata->credits = 0;
|
|
/* reduce in_flight value since we won't send the req */
|
|
spin_lock(&server->req_lock);
|
|
server->in_flight--;
|
|
spin_unlock(&server->req_lock);
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
buf = (struct smb2_hdr *)rdata->iov.iov_base;
|
|
/* 4 for rfc1002 length field */
|
|
rdata->iov.iov_len = get_rfc1002_length(rdata->iov.iov_base) + 4;
|
|
|
|
if (rdata->credits) {
|
|
buf->CreditCharge = cpu_to_le16(DIV_ROUND_UP(rdata->bytes,
|
|
SMB2_MAX_BUFFER_SIZE));
|
|
spin_lock(&server->req_lock);
|
|
server->credits += rdata->credits -
|
|
le16_to_cpu(buf->CreditCharge);
|
|
spin_unlock(&server->req_lock);
|
|
wake_up(&server->request_q);
|
|
flags = CIFS_HAS_CREDITS;
|
|
}
|
|
|
|
kref_get(&rdata->refcount);
|
|
rc = cifs_call_async(io_parms.tcon->ses->server, &rqst,
|
|
cifs_readv_receive, smb2_readv_callback,
|
|
rdata, flags);
|
|
if (rc) {
|
|
kref_put(&rdata->refcount, cifs_readdata_release);
|
|
cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE);
|
|
}
|
|
|
|
cifs_small_buf_release(buf);
|
|
return rc;
|
|
}
|
|
|
|
int
|
|
SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
|
|
unsigned int *nbytes, char **buf, int *buf_type)
|
|
{
|
|
int resp_buftype, rc = -EACCES;
|
|
struct smb2_read_rsp *rsp = NULL;
|
|
struct kvec iov[1];
|
|
|
|
*nbytes = 0;
|
|
rc = smb2_new_read_req(iov, io_parms, 0, 0);
|
|
if (rc)
|
|
return rc;
|
|
|
|
rc = SendReceive2(xid, io_parms->tcon->ses, iov, 1,
|
|
&resp_buftype, CIFS_LOG_ERROR);
|
|
|
|
rsp = (struct smb2_read_rsp *)iov[0].iov_base;
|
|
|
|
if (rsp->hdr.Status == STATUS_END_OF_FILE) {
|
|
free_rsp_buf(resp_buftype, iov[0].iov_base);
|
|
return 0;
|
|
}
|
|
|
|
if (rc) {
|
|
cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE);
|
|
cifs_dbg(VFS, "Send error in read = %d\n", rc);
|
|
} else {
|
|
*nbytes = le32_to_cpu(rsp->DataLength);
|
|
if ((*nbytes > CIFS_MAX_MSGSIZE) ||
|
|
(*nbytes > io_parms->length)) {
|
|
cifs_dbg(FYI, "bad length %d for count %d\n",
|
|
*nbytes, io_parms->length);
|
|
rc = -EIO;
|
|
*nbytes = 0;
|
|
}
|
|
}
|
|
|
|
if (*buf) {
|
|
memcpy(*buf, (char *)rsp->hdr.ProtocolId + rsp->DataOffset,
|
|
*nbytes);
|
|
free_rsp_buf(resp_buftype, iov[0].iov_base);
|
|
} else if (resp_buftype != CIFS_NO_BUFFER) {
|
|
*buf = iov[0].iov_base;
|
|
if (resp_buftype == CIFS_SMALL_BUFFER)
|
|
*buf_type = CIFS_SMALL_BUFFER;
|
|
else if (resp_buftype == CIFS_LARGE_BUFFER)
|
|
*buf_type = CIFS_LARGE_BUFFER;
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
/*
|
|
* Check the mid_state and signature on received buffer (if any), and queue the
|
|
* workqueue completion task.
|
|
*/
|
|
static void
|
|
smb2_writev_callback(struct mid_q_entry *mid)
|
|
{
|
|
struct cifs_writedata *wdata = mid->callback_data;
|
|
struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
|
|
struct TCP_Server_Info *server = tcon->ses->server;
|
|
unsigned int written;
|
|
struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf;
|
|
unsigned int credits_received = 1;
|
|
|
|
switch (mid->mid_state) {
|
|
case MID_RESPONSE_RECEIVED:
|
|
credits_received = le16_to_cpu(rsp->hdr.CreditRequest);
|
|
wdata->result = smb2_check_receive(mid, tcon->ses->server, 0);
|
|
if (wdata->result != 0)
|
|
break;
|
|
|
|
written = le32_to_cpu(rsp->DataLength);
|
|
/*
|
|
* Mask off high 16 bits when bytes written as returned
|
|
* by the server is greater than bytes requested by the
|
|
* client. OS/2 servers are known to set incorrect
|
|
* CountHigh values.
|
|
*/
|
|
if (written > wdata->bytes)
|
|
written &= 0xFFFF;
|
|
|
|
if (written < wdata->bytes)
|
|
wdata->result = -ENOSPC;
|
|
else
|
|
wdata->bytes = written;
|
|
break;
|
|
case MID_REQUEST_SUBMITTED:
|
|
case MID_RETRY_NEEDED:
|
|
wdata->result = -EAGAIN;
|
|
break;
|
|
default:
|
|
wdata->result = -EIO;
|
|
break;
|
|
}
|
|
|
|
if (wdata->result)
|
|
cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
|
|
|
|
queue_work(cifsiod_wq, &wdata->work);
|
|
mutex_lock(&server->srv_mutex);
|
|
DeleteMidQEntry(mid);
|
|
mutex_unlock(&server->srv_mutex);
|
|
add_credits(tcon->ses->server, credits_received, 0);
|
|
}
|
|
|
|
/* smb2_async_writev - send an async write, and set up mid to handle result */
|
|
int
|
|
smb2_async_writev(struct cifs_writedata *wdata,
|
|
void (*release)(struct kref *kref))
|
|
{
|
|
int rc = -EACCES, flags = 0;
|
|
struct smb2_write_req *req = NULL;
|
|
struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
|
|
struct TCP_Server_Info *server = tcon->ses->server;
|
|
struct kvec iov;
|
|
struct smb_rqst rqst;
|
|
|
|
rc = small_smb2_init(SMB2_WRITE, tcon, (void **) &req);
|
|
if (rc) {
|
|
if (rc == -EAGAIN && wdata->credits) {
|
|
/* credits was reset by reconnect */
|
|
wdata->credits = 0;
|
|
/* reduce in_flight value since we won't send the req */
|
|
spin_lock(&server->req_lock);
|
|
server->in_flight--;
|
|
spin_unlock(&server->req_lock);
|
|
}
|
|
goto async_writev_out;
|
|
}
|
|
|
|
req->hdr.ProcessId = cpu_to_le32(wdata->cfile->pid);
|
|
|
|
req->PersistentFileId = wdata->cfile->fid.persistent_fid;
|
|
req->VolatileFileId = wdata->cfile->fid.volatile_fid;
|
|
req->WriteChannelInfoOffset = 0;
|
|
req->WriteChannelInfoLength = 0;
|
|
req->Channel = 0;
|
|
req->Offset = cpu_to_le64(wdata->offset);
|
|
/* 4 for rfc1002 length field */
|
|
req->DataOffset = cpu_to_le16(
|
|
offsetof(struct smb2_write_req, Buffer) - 4);
|
|
req->RemainingBytes = 0;
|
|
|
|
/* 4 for rfc1002 length field and 1 for Buffer */
|
|
iov.iov_len = get_rfc1002_length(req) + 4 - 1;
|
|
iov.iov_base = req;
|
|
|
|
rqst.rq_iov = &iov;
|
|
rqst.rq_nvec = 1;
|
|
rqst.rq_pages = wdata->pages;
|
|
rqst.rq_npages = wdata->nr_pages;
|
|
rqst.rq_pagesz = wdata->pagesz;
|
|
rqst.rq_tailsz = wdata->tailsz;
|
|
|
|
cifs_dbg(FYI, "async write at %llu %u bytes\n",
|
|
wdata->offset, wdata->bytes);
|
|
|
|
req->Length = cpu_to_le32(wdata->bytes);
|
|
|
|
inc_rfc1001_len(&req->hdr, wdata->bytes - 1 /* Buffer */);
|
|
|
|
if (wdata->credits) {
|
|
req->hdr.CreditCharge = cpu_to_le16(DIV_ROUND_UP(wdata->bytes,
|
|
SMB2_MAX_BUFFER_SIZE));
|
|
spin_lock(&server->req_lock);
|
|
server->credits += wdata->credits -
|
|
le16_to_cpu(req->hdr.CreditCharge);
|
|
spin_unlock(&server->req_lock);
|
|
wake_up(&server->request_q);
|
|
flags = CIFS_HAS_CREDITS;
|
|
}
|
|
|
|
kref_get(&wdata->refcount);
|
|
rc = cifs_call_async(server, &rqst, NULL, smb2_writev_callback, wdata,
|
|
flags);
|
|
|
|
if (rc) {
|
|
kref_put(&wdata->refcount, release);
|
|
cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
|
|
}
|
|
|
|
async_writev_out:
|
|
cifs_small_buf_release(req);
|
|
return rc;
|
|
}
|
|
|
|
/*
|
|
* SMB2_write function gets iov pointer to kvec array with n_vec as a length.
|
|
* The length field from io_parms must be at least 1 and indicates a number of
|
|
* elements with data to write that begins with position 1 in iov array. All
|
|
* data length is specified by count.
|
|
*/
|
|
int
|
|
SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
|
|
unsigned int *nbytes, struct kvec *iov, int n_vec)
|
|
{
|
|
int rc = 0;
|
|
struct smb2_write_req *req = NULL;
|
|
struct smb2_write_rsp *rsp = NULL;
|
|
int resp_buftype;
|
|
*nbytes = 0;
|
|
|
|
if (n_vec < 1)
|
|
return rc;
|
|
|
|
rc = small_smb2_init(SMB2_WRITE, io_parms->tcon, (void **) &req);
|
|
if (rc)
|
|
return rc;
|
|
|
|
if (io_parms->tcon->ses->server == NULL)
|
|
return -ECONNABORTED;
|
|
|
|
req->hdr.ProcessId = cpu_to_le32(io_parms->pid);
|
|
|
|
req->PersistentFileId = io_parms->persistent_fid;
|
|
req->VolatileFileId = io_parms->volatile_fid;
|
|
req->WriteChannelInfoOffset = 0;
|
|
req->WriteChannelInfoLength = 0;
|
|
req->Channel = 0;
|
|
req->Length = cpu_to_le32(io_parms->length);
|
|
req->Offset = cpu_to_le64(io_parms->offset);
|
|
/* 4 for rfc1002 length field */
|
|
req->DataOffset = cpu_to_le16(
|
|
offsetof(struct smb2_write_req, Buffer) - 4);
|
|
req->RemainingBytes = 0;
|
|
|
|
iov[0].iov_base = (char *)req;
|
|
/* 4 for rfc1002 length field and 1 for Buffer */
|
|
iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
|
|
|
|
/* length of entire message including data to be written */
|
|
inc_rfc1001_len(req, io_parms->length - 1 /* Buffer */);
|
|
|
|
rc = SendReceive2(xid, io_parms->tcon->ses, iov, n_vec + 1,
|
|
&resp_buftype, 0);
|
|
rsp = (struct smb2_write_rsp *)iov[0].iov_base;
|
|
|
|
if (rc) {
|
|
cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE);
|
|
cifs_dbg(VFS, "Send error in write = %d\n", rc);
|
|
} else
|
|
*nbytes = le32_to_cpu(rsp->DataLength);
|
|
|
|
free_rsp_buf(resp_buftype, rsp);
|
|
return rc;
|
|
}
|
|
|
|
static unsigned int
|
|
num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size)
|
|
{
|
|
int len;
|
|
unsigned int entrycount = 0;
|
|
unsigned int next_offset = 0;
|
|
FILE_DIRECTORY_INFO *entryptr;
|
|
|
|
if (bufstart == NULL)
|
|
return 0;
|
|
|
|
entryptr = (FILE_DIRECTORY_INFO *)bufstart;
|
|
|
|
while (1) {
|
|
entryptr = (FILE_DIRECTORY_INFO *)
|
|
((char *)entryptr + next_offset);
|
|
|
|
if ((char *)entryptr + size > end_of_buf) {
|
|
cifs_dbg(VFS, "malformed search entry would overflow\n");
|
|
break;
|
|
}
|
|
|
|
len = le32_to_cpu(entryptr->FileNameLength);
|
|
if ((char *)entryptr + len + size > end_of_buf) {
|
|
cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n",
|
|
end_of_buf);
|
|
break;
|
|
}
|
|
|
|
*lastentry = (char *)entryptr;
|
|
entrycount++;
|
|
|
|
next_offset = le32_to_cpu(entryptr->NextEntryOffset);
|
|
if (!next_offset)
|
|
break;
|
|
}
|
|
|
|
return entrycount;
|
|
}
|
|
|
|
/*
|
|
* Readdir/FindFirst
|
|
*/
|
|
int
|
|
SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
|
|
u64 persistent_fid, u64 volatile_fid, int index,
|
|
struct cifs_search_info *srch_inf)
|
|
{
|
|
struct smb2_query_directory_req *req;
|
|
struct smb2_query_directory_rsp *rsp = NULL;
|
|
struct kvec iov[2];
|
|
int rc = 0;
|
|
int len;
|
|
int resp_buftype = CIFS_NO_BUFFER;
|
|
unsigned char *bufptr;
|
|
struct TCP_Server_Info *server;
|
|
struct cifs_ses *ses = tcon->ses;
|
|
__le16 asteriks = cpu_to_le16('*');
|
|
char *end_of_smb;
|
|
unsigned int output_size = CIFSMaxBufSize;
|
|
size_t info_buf_size;
|
|
|
|
if (ses && (ses->server))
|
|
server = ses->server;
|
|
else
|
|
return -EIO;
|
|
|
|
rc = small_smb2_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req);
|
|
if (rc)
|
|
return rc;
|
|
|
|
switch (srch_inf->info_level) {
|
|
case SMB_FIND_FILE_DIRECTORY_INFO:
|
|
req->FileInformationClass = FILE_DIRECTORY_INFORMATION;
|
|
info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1;
|
|
break;
|
|
case SMB_FIND_FILE_ID_FULL_DIR_INFO:
|
|
req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION;
|
|
info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1;
|
|
break;
|
|
default:
|
|
cifs_dbg(VFS, "info level %u isn't supported\n",
|
|
srch_inf->info_level);
|
|
rc = -EINVAL;
|
|
goto qdir_exit;
|
|
}
|
|
|
|
req->FileIndex = cpu_to_le32(index);
|
|
req->PersistentFileId = persistent_fid;
|
|
req->VolatileFileId = volatile_fid;
|
|
|
|
len = 0x2;
|
|
bufptr = req->Buffer;
|
|
memcpy(bufptr, &asteriks, len);
|
|
|
|
req->FileNameOffset =
|
|
cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1 - 4);
|
|
req->FileNameLength = cpu_to_le16(len);
|
|
/*
|
|
* BB could be 30 bytes or so longer if we used SMB2 specific
|
|
* buffer lengths, but this is safe and close enough.
|
|
*/
|
|
output_size = min_t(unsigned int, output_size, server->maxBuf);
|
|
output_size = min_t(unsigned int, output_size, 2 << 15);
|
|
req->OutputBufferLength = cpu_to_le32(output_size);
|
|
|
|
iov[0].iov_base = (char *)req;
|
|
/* 4 for RFC1001 length and 1 for Buffer */
|
|
iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
|
|
|
|
iov[1].iov_base = (char *)(req->Buffer);
|
|
iov[1].iov_len = len;
|
|
|
|
inc_rfc1001_len(req, len - 1 /* Buffer */);
|
|
|
|
rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0);
|
|
rsp = (struct smb2_query_directory_rsp *)iov[0].iov_base;
|
|
|
|
if (rc) {
|
|
if (rc == -ENODATA && rsp->hdr.Status == STATUS_NO_MORE_FILES) {
|
|
srch_inf->endOfSearch = true;
|
|
rc = 0;
|
|
}
|
|
cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE);
|
|
goto qdir_exit;
|
|
}
|
|
|
|
rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
|
|
le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
|
|
info_buf_size);
|
|
if (rc)
|
|
goto qdir_exit;
|
|
|
|
srch_inf->unicode = true;
|
|
|
|
if (srch_inf->ntwrk_buf_start) {
|
|
if (srch_inf->smallBuf)
|
|
cifs_small_buf_release(srch_inf->ntwrk_buf_start);
|
|
else
|
|
cifs_buf_release(srch_inf->ntwrk_buf_start);
|
|
}
|
|
srch_inf->ntwrk_buf_start = (char *)rsp;
|
|
srch_inf->srch_entries_start = srch_inf->last_entry = 4 /* rfclen */ +
|
|
(char *)&rsp->hdr + le16_to_cpu(rsp->OutputBufferOffset);
|
|
/* 4 for rfc1002 length field */
|
|
end_of_smb = get_rfc1002_length(rsp) + 4 + (char *)&rsp->hdr;
|
|
srch_inf->entries_in_buffer =
|
|
num_entries(srch_inf->srch_entries_start, end_of_smb,
|
|
&srch_inf->last_entry, info_buf_size);
|
|
srch_inf->index_of_last_entry += srch_inf->entries_in_buffer;
|
|
cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n",
|
|
srch_inf->entries_in_buffer, srch_inf->index_of_last_entry,
|
|
srch_inf->srch_entries_start, srch_inf->last_entry);
|
|
if (resp_buftype == CIFS_LARGE_BUFFER)
|
|
srch_inf->smallBuf = false;
|
|
else if (resp_buftype == CIFS_SMALL_BUFFER)
|
|
srch_inf->smallBuf = true;
|
|
else
|
|
cifs_dbg(VFS, "illegal search buffer type\n");
|
|
|
|
return rc;
|
|
|
|
qdir_exit:
|
|
free_rsp_buf(resp_buftype, rsp);
|
|
return rc;
|
|
}
|
|
|
|
static int
|
|
send_set_info(const unsigned int xid, struct cifs_tcon *tcon,
|
|
u64 persistent_fid, u64 volatile_fid, u32 pid, int info_class,
|
|
unsigned int num, void **data, unsigned int *size)
|
|
{
|
|
struct smb2_set_info_req *req;
|
|
struct smb2_set_info_rsp *rsp = NULL;
|
|
struct kvec *iov;
|
|
int rc = 0;
|
|
int resp_buftype;
|
|
unsigned int i;
|
|
struct TCP_Server_Info *server;
|
|
struct cifs_ses *ses = tcon->ses;
|
|
|
|
if (ses && (ses->server))
|
|
server = ses->server;
|
|
else
|
|
return -EIO;
|
|
|
|
if (!num)
|
|
return -EINVAL;
|
|
|
|
iov = kmalloc(sizeof(struct kvec) * num, GFP_KERNEL);
|
|
if (!iov)
|
|
return -ENOMEM;
|
|
|
|
rc = small_smb2_init(SMB2_SET_INFO, tcon, (void **) &req);
|
|
if (rc) {
|
|
kfree(iov);
|
|
return rc;
|
|
}
|
|
|
|
req->hdr.ProcessId = cpu_to_le32(pid);
|
|
|
|
req->InfoType = SMB2_O_INFO_FILE;
|
|
req->FileInfoClass = info_class;
|
|
req->PersistentFileId = persistent_fid;
|
|
req->VolatileFileId = volatile_fid;
|
|
|
|
/* 4 for RFC1001 length and 1 for Buffer */
|
|
req->BufferOffset =
|
|
cpu_to_le16(sizeof(struct smb2_set_info_req) - 1 - 4);
|
|
req->BufferLength = cpu_to_le32(*size);
|
|
|
|
inc_rfc1001_len(req, *size - 1 /* Buffer */);
|
|
|
|
memcpy(req->Buffer, *data, *size);
|
|
|
|
iov[0].iov_base = (char *)req;
|
|
/* 4 for RFC1001 length */
|
|
iov[0].iov_len = get_rfc1002_length(req) + 4;
|
|
|
|
for (i = 1; i < num; i++) {
|
|
inc_rfc1001_len(req, size[i]);
|
|
le32_add_cpu(&req->BufferLength, size[i]);
|
|
iov[i].iov_base = (char *)data[i];
|
|
iov[i].iov_len = size[i];
|
|
}
|
|
|
|
rc = SendReceive2(xid, ses, iov, num, &resp_buftype, 0);
|
|
rsp = (struct smb2_set_info_rsp *)iov[0].iov_base;
|
|
|
|
if (rc != 0)
|
|
cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE);
|
|
|
|
free_rsp_buf(resp_buftype, rsp);
|
|
kfree(iov);
|
|
return rc;
|
|
}
|
|
|
|
int
|
|
SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon,
|
|
u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
|
|
{
|
|
struct smb2_file_rename_info info;
|
|
void **data;
|
|
unsigned int size[2];
|
|
int rc;
|
|
int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
|
|
|
|
data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
|
|
if (!data)
|
|
return -ENOMEM;
|
|
|
|
info.ReplaceIfExists = 1; /* 1 = replace existing target with new */
|
|
/* 0 = fail if target already exists */
|
|
info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
|
|
info.FileNameLength = cpu_to_le32(len);
|
|
|
|
data[0] = &info;
|
|
size[0] = sizeof(struct smb2_file_rename_info);
|
|
|
|
data[1] = target_file;
|
|
size[1] = len + 2 /* null */;
|
|
|
|
rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
|
|
current->tgid, FILE_RENAME_INFORMATION, 2, data,
|
|
size);
|
|
kfree(data);
|
|
return rc;
|
|
}
|
|
|
|
int
|
|
SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
|
|
u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
|
|
{
|
|
struct smb2_file_link_info info;
|
|
void **data;
|
|
unsigned int size[2];
|
|
int rc;
|
|
int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
|
|
|
|
data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
|
|
if (!data)
|
|
return -ENOMEM;
|
|
|
|
info.ReplaceIfExists = 0; /* 1 = replace existing link with new */
|
|
/* 0 = fail if link already exists */
|
|
info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
|
|
info.FileNameLength = cpu_to_le32(len);
|
|
|
|
data[0] = &info;
|
|
size[0] = sizeof(struct smb2_file_link_info);
|
|
|
|
data[1] = target_file;
|
|
size[1] = len + 2 /* null */;
|
|
|
|
rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
|
|
current->tgid, FILE_LINK_INFORMATION, 2, data, size);
|
|
kfree(data);
|
|
return rc;
|
|
}
|
|
|
|
int
|
|
SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
|
|
u64 volatile_fid, u32 pid, __le64 *eof, bool is_falloc)
|
|
{
|
|
struct smb2_file_eof_info info;
|
|
void *data;
|
|
unsigned int size;
|
|
|
|
info.EndOfFile = *eof;
|
|
|
|
data = &info;
|
|
size = sizeof(struct smb2_file_eof_info);
|
|
|
|
if (is_falloc)
|
|
return send_set_info(xid, tcon, persistent_fid, volatile_fid,
|
|
pid, FILE_ALLOCATION_INFORMATION, 1, &data, &size);
|
|
else
|
|
return send_set_info(xid, tcon, persistent_fid, volatile_fid,
|
|
pid, FILE_END_OF_FILE_INFORMATION, 1, &data, &size);
|
|
}
|
|
|
|
int
|
|
SMB2_set_info(const unsigned int xid, struct cifs_tcon *tcon,
|
|
u64 persistent_fid, u64 volatile_fid, FILE_BASIC_INFO *buf)
|
|
{
|
|
unsigned int size;
|
|
size = sizeof(FILE_BASIC_INFO);
|
|
return send_set_info(xid, tcon, persistent_fid, volatile_fid,
|
|
current->tgid, FILE_BASIC_INFORMATION, 1,
|
|
(void **)&buf, &size);
|
|
}
|
|
|
|
int
|
|
SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
|
|
const u64 persistent_fid, const u64 volatile_fid,
|
|
__u8 oplock_level)
|
|
{
|
|
int rc;
|
|
struct smb2_oplock_break *req = NULL;
|
|
|
|
cifs_dbg(FYI, "SMB2_oplock_break\n");
|
|
rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
|
|
|
|
if (rc)
|
|
return rc;
|
|
|
|
req->VolatileFid = volatile_fid;
|
|
req->PersistentFid = persistent_fid;
|
|
req->OplockLevel = oplock_level;
|
|
req->hdr.CreditRequest = cpu_to_le16(1);
|
|
|
|
rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP);
|
|
/* SMB2 buffer freed by function above */
|
|
|
|
if (rc) {
|
|
cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
|
|
cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc);
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
static void
|
|
copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf,
|
|
struct kstatfs *kst)
|
|
{
|
|
kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) *
|
|
le32_to_cpu(pfs_inf->SectorsPerAllocationUnit);
|
|
kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits);
|
|
kst->f_bfree = le64_to_cpu(pfs_inf->ActualAvailableAllocationUnits);
|
|
kst->f_bavail = le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits);
|
|
return;
|
|
}
|
|
|
|
static int
|
|
build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level,
|
|
int outbuf_len, u64 persistent_fid, u64 volatile_fid)
|
|
{
|
|
int rc;
|
|
struct smb2_query_info_req *req;
|
|
|
|
cifs_dbg(FYI, "Query FSInfo level %d\n", level);
|
|
|
|
if ((tcon->ses == NULL) || (tcon->ses->server == NULL))
|
|
return -EIO;
|
|
|
|
rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
|
|
if (rc)
|
|
return rc;
|
|
|
|
req->InfoType = SMB2_O_INFO_FILESYSTEM;
|
|
req->FileInfoClass = level;
|
|
req->PersistentFileId = persistent_fid;
|
|
req->VolatileFileId = volatile_fid;
|
|
/* 4 for rfc1002 length field and 1 for pad */
|
|
req->InputBufferOffset =
|
|
cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
|
|
req->OutputBufferLength = cpu_to_le32(
|
|
outbuf_len + sizeof(struct smb2_query_info_rsp) - 1 - 4);
|
|
|
|
iov->iov_base = (char *)req;
|
|
/* 4 for rfc1002 length field */
|
|
iov->iov_len = get_rfc1002_length(req) + 4;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
|
|
u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
|
|
{
|
|
struct smb2_query_info_rsp *rsp = NULL;
|
|
struct kvec iov;
|
|
int rc = 0;
|
|
int resp_buftype;
|
|
struct cifs_ses *ses = tcon->ses;
|
|
struct smb2_fs_full_size_info *info = NULL;
|
|
|
|
rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION,
|
|
sizeof(struct smb2_fs_full_size_info),
|
|
persistent_fid, volatile_fid);
|
|
if (rc)
|
|
return rc;
|
|
|
|
rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0);
|
|
if (rc) {
|
|
cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
|
|
goto qfsinf_exit;
|
|
}
|
|
rsp = (struct smb2_query_info_rsp *)iov.iov_base;
|
|
|
|
info = (struct smb2_fs_full_size_info *)(4 /* RFC1001 len */ +
|
|
le16_to_cpu(rsp->OutputBufferOffset) + (char *)&rsp->hdr);
|
|
rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
|
|
le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
|
|
sizeof(struct smb2_fs_full_size_info));
|
|
if (!rc)
|
|
copy_fs_info_to_kstatfs(info, fsdata);
|
|
|
|
qfsinf_exit:
|
|
free_rsp_buf(resp_buftype, iov.iov_base);
|
|
return rc;
|
|
}
|
|
|
|
int
|
|
SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
|
|
u64 persistent_fid, u64 volatile_fid, int level)
|
|
{
|
|
struct smb2_query_info_rsp *rsp = NULL;
|
|
struct kvec iov;
|
|
int rc = 0;
|
|
int resp_buftype, max_len, min_len;
|
|
struct cifs_ses *ses = tcon->ses;
|
|
unsigned int rsp_len, offset;
|
|
|
|
if (level == FS_DEVICE_INFORMATION) {
|
|
max_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
|
|
min_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
|
|
} else if (level == FS_ATTRIBUTE_INFORMATION) {
|
|
max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO);
|
|
min_len = MIN_FS_ATTR_INFO_SIZE;
|
|
} else if (level == FS_SECTOR_SIZE_INFORMATION) {
|
|
max_len = sizeof(struct smb3_fs_ss_info);
|
|
min_len = sizeof(struct smb3_fs_ss_info);
|
|
} else {
|
|
cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level);
|
|
return -EINVAL;
|
|
}
|
|
|
|
rc = build_qfs_info_req(&iov, tcon, level, max_len,
|
|
persistent_fid, volatile_fid);
|
|
if (rc)
|
|
return rc;
|
|
|
|
rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0);
|
|
if (rc) {
|
|
cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
|
|
goto qfsattr_exit;
|
|
}
|
|
rsp = (struct smb2_query_info_rsp *)iov.iov_base;
|
|
|
|
rsp_len = le32_to_cpu(rsp->OutputBufferLength);
|
|
offset = le16_to_cpu(rsp->OutputBufferOffset);
|
|
rc = validate_buf(offset, rsp_len, &rsp->hdr, min_len);
|
|
if (rc)
|
|
goto qfsattr_exit;
|
|
|
|
if (level == FS_ATTRIBUTE_INFORMATION)
|
|
memcpy(&tcon->fsAttrInfo, 4 /* RFC1001 len */ + offset
|
|
+ (char *)&rsp->hdr, min_t(unsigned int,
|
|
rsp_len, max_len));
|
|
else if (level == FS_DEVICE_INFORMATION)
|
|
memcpy(&tcon->fsDevInfo, 4 /* RFC1001 len */ + offset
|
|
+ (char *)&rsp->hdr, sizeof(FILE_SYSTEM_DEVICE_INFO));
|
|
else if (level == FS_SECTOR_SIZE_INFORMATION) {
|
|
struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *)
|
|
(4 /* RFC1001 len */ + offset + (char *)&rsp->hdr);
|
|
tcon->ss_flags = le32_to_cpu(ss_info->Flags);
|
|
tcon->perf_sector_size =
|
|
le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf);
|
|
}
|
|
|
|
qfsattr_exit:
|
|
free_rsp_buf(resp_buftype, iov.iov_base);
|
|
return rc;
|
|
}
|
|
|
|
int
|
|
smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon,
|
|
const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
|
|
const __u32 num_lock, struct smb2_lock_element *buf)
|
|
{
|
|
int rc = 0;
|
|
struct smb2_lock_req *req = NULL;
|
|
struct kvec iov[2];
|
|
int resp_buf_type;
|
|
unsigned int count;
|
|
|
|
cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock);
|
|
|
|
rc = small_smb2_init(SMB2_LOCK, tcon, (void **) &req);
|
|
if (rc)
|
|
return rc;
|
|
|
|
req->hdr.ProcessId = cpu_to_le32(pid);
|
|
req->LockCount = cpu_to_le16(num_lock);
|
|
|
|
req->PersistentFileId = persist_fid;
|
|
req->VolatileFileId = volatile_fid;
|
|
|
|
count = num_lock * sizeof(struct smb2_lock_element);
|
|
inc_rfc1001_len(req, count - sizeof(struct smb2_lock_element));
|
|
|
|
iov[0].iov_base = (char *)req;
|
|
/* 4 for rfc1002 length field and count for all locks */
|
|
iov[0].iov_len = get_rfc1002_length(req) + 4 - count;
|
|
iov[1].iov_base = (char *)buf;
|
|
iov[1].iov_len = count;
|
|
|
|
cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
|
|
rc = SendReceive2(xid, tcon->ses, iov, 2, &resp_buf_type, CIFS_NO_RESP);
|
|
if (rc) {
|
|
cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc);
|
|
cifs_stats_fail_inc(tcon, SMB2_LOCK_HE);
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
int
|
|
SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon,
|
|
const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
|
|
const __u64 length, const __u64 offset, const __u32 lock_flags,
|
|
const bool wait)
|
|
{
|
|
struct smb2_lock_element lock;
|
|
|
|
lock.Offset = cpu_to_le64(offset);
|
|
lock.Length = cpu_to_le64(length);
|
|
lock.Flags = cpu_to_le32(lock_flags);
|
|
if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK)
|
|
lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY);
|
|
|
|
return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock);
|
|
}
|
|
|
|
int
|
|
SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon,
|
|
__u8 *lease_key, const __le32 lease_state)
|
|
{
|
|
int rc;
|
|
struct smb2_lease_ack *req = NULL;
|
|
|
|
cifs_dbg(FYI, "SMB2_lease_break\n");
|
|
rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
|
|
|
|
if (rc)
|
|
return rc;
|
|
|
|
req->hdr.CreditRequest = cpu_to_le16(1);
|
|
req->StructureSize = cpu_to_le16(36);
|
|
inc_rfc1001_len(req, 12);
|
|
|
|
memcpy(req->LeaseKey, lease_key, 16);
|
|
req->LeaseState = lease_state;
|
|
|
|
rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP);
|
|
/* SMB2 buffer freed by function above */
|
|
|
|
if (rc) {
|
|
cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
|
|
cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc);
|
|
}
|
|
|
|
return rc;
|
|
}
|