forked from Minki/linux
d6fd41905e
We ran into a confusing problem where an application wasn't checking return code on close and so user didn't realize that the application ran out of disk space. log a warning message (once) in these cases. For example: [ 8407.391909] Out of space writing to \\oleg-server\small-share Signed-off-by: Steve French <stfrench@microsoft.com> Reported-by: Oleg Kravtsov <oleg@tuxera.com> Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com> Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
5079 lines
140 KiB
C
5079 lines
140 KiB
C
/*
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* fs/cifs/smb2pdu.c
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*
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* Copyright (C) International Business Machines Corp., 2009, 2013
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* Etersoft, 2012
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* Author(s): Steve French (sfrench@us.ibm.com)
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* Pavel Shilovsky (pshilovsky@samba.org) 2012
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*
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* Contains the routines for constructing the SMB2 PDUs themselves
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*
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* This library is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published
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* by the Free Software Foundation; either version 2.1 of the License, or
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* (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/* SMB2 PDU handling routines here - except for leftovers (eg session setup) */
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/* Note that there are handle based routines which must be */
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/* treated slightly differently for reconnection purposes since we never */
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/* want to reuse a stale file handle and only the caller knows the file info */
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#include <linux/fs.h>
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#include <linux/kernel.h>
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#include <linux/vfs.h>
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#include <linux/task_io_accounting_ops.h>
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#include <linux/uaccess.h>
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#include <linux/uuid.h>
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#include <linux/pagemap.h>
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#include <linux/xattr.h>
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#include "smb2pdu.h"
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#include "cifsglob.h"
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#include "cifsacl.h"
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#include "cifsproto.h"
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#include "smb2proto.h"
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#include "cifs_unicode.h"
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#include "cifs_debug.h"
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#include "ntlmssp.h"
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#include "smb2status.h"
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#include "smb2glob.h"
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#include "cifspdu.h"
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#include "cifs_spnego.h"
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#include "smbdirect.h"
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#include "trace.h"
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#ifdef CONFIG_CIFS_DFS_UPCALL
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#include "dfs_cache.h"
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#endif
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/*
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* The following table defines the expected "StructureSize" of SMB2 requests
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* in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests.
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*
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* Note that commands are defined in smb2pdu.h in le16 but the array below is
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* indexed by command in host byte order.
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*/
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static const int smb2_req_struct_sizes[NUMBER_OF_SMB2_COMMANDS] = {
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/* SMB2_NEGOTIATE */ 36,
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/* SMB2_SESSION_SETUP */ 25,
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/* SMB2_LOGOFF */ 4,
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/* SMB2_TREE_CONNECT */ 9,
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/* SMB2_TREE_DISCONNECT */ 4,
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/* SMB2_CREATE */ 57,
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/* SMB2_CLOSE */ 24,
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/* SMB2_FLUSH */ 24,
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/* SMB2_READ */ 49,
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/* SMB2_WRITE */ 49,
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/* SMB2_LOCK */ 48,
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/* SMB2_IOCTL */ 57,
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/* SMB2_CANCEL */ 4,
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/* SMB2_ECHO */ 4,
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/* SMB2_QUERY_DIRECTORY */ 33,
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/* SMB2_CHANGE_NOTIFY */ 32,
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/* SMB2_QUERY_INFO */ 41,
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/* SMB2_SET_INFO */ 33,
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/* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */
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};
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int smb3_encryption_required(const struct cifs_tcon *tcon)
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{
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if (!tcon)
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return 0;
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if ((tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) ||
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(tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA))
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return 1;
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if (tcon->seal &&
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(tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION))
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return 1;
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return 0;
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}
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static void
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smb2_hdr_assemble(struct smb2_sync_hdr *shdr, __le16 smb2_cmd,
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const struct cifs_tcon *tcon)
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{
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shdr->ProtocolId = SMB2_PROTO_NUMBER;
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shdr->StructureSize = cpu_to_le16(64);
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shdr->Command = smb2_cmd;
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if (tcon && tcon->ses && tcon->ses->server) {
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struct TCP_Server_Info *server = tcon->ses->server;
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spin_lock(&server->req_lock);
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/* Request up to 10 credits but don't go over the limit. */
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if (server->credits >= server->max_credits)
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shdr->CreditRequest = cpu_to_le16(0);
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else
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shdr->CreditRequest = cpu_to_le16(
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min_t(int, server->max_credits -
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server->credits, 10));
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spin_unlock(&server->req_lock);
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} else {
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shdr->CreditRequest = cpu_to_le16(2);
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}
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shdr->ProcessId = cpu_to_le32((__u16)current->tgid);
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if (!tcon)
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goto out;
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/* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */
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/* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */
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if ((tcon->ses) && (tcon->ses->server) &&
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(tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
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shdr->CreditCharge = cpu_to_le16(1);
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/* else CreditCharge MBZ */
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shdr->TreeId = tcon->tid;
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/* Uid is not converted */
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if (tcon->ses)
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shdr->SessionId = tcon->ses->Suid;
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/*
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* If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have
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* to pass the path on the Open SMB prefixed by \\server\share.
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* Not sure when we would need to do the augmented path (if ever) and
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* setting this flag breaks the SMB2 open operation since it is
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* illegal to send an empty path name (without \\server\share prefix)
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* when the DFS flag is set in the SMB open header. We could
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* consider setting the flag on all operations other than open
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* but it is safer to net set it for now.
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*/
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/* if (tcon->share_flags & SHI1005_FLAGS_DFS)
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shdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */
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if (tcon->ses && tcon->ses->server && tcon->ses->server->sign &&
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!smb3_encryption_required(tcon))
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shdr->Flags |= SMB2_FLAGS_SIGNED;
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out:
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return;
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}
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#ifdef CONFIG_CIFS_DFS_UPCALL
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static int __smb2_reconnect(const struct nls_table *nlsc,
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struct cifs_tcon *tcon)
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{
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int rc;
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struct dfs_cache_tgt_list tl;
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struct dfs_cache_tgt_iterator *it = NULL;
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char *tree;
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const char *tcp_host;
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size_t tcp_host_len;
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const char *dfs_host;
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size_t dfs_host_len;
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tree = kzalloc(MAX_TREE_SIZE, GFP_KERNEL);
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if (!tree)
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return -ENOMEM;
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if (tcon->ipc) {
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scnprintf(tree, MAX_TREE_SIZE, "\\\\%s\\IPC$",
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tcon->ses->server->hostname);
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rc = SMB2_tcon(0, tcon->ses, tree, tcon, nlsc);
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goto out;
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}
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if (!tcon->dfs_path) {
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rc = SMB2_tcon(0, tcon->ses, tcon->treeName, tcon, nlsc);
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goto out;
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}
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rc = dfs_cache_noreq_find(tcon->dfs_path + 1, NULL, &tl);
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if (rc)
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goto out;
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extract_unc_hostname(tcon->ses->server->hostname, &tcp_host,
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&tcp_host_len);
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for (it = dfs_cache_get_tgt_iterator(&tl); it;
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it = dfs_cache_get_next_tgt(&tl, it)) {
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const char *tgt = dfs_cache_get_tgt_name(it);
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extract_unc_hostname(tgt, &dfs_host, &dfs_host_len);
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if (dfs_host_len != tcp_host_len
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|| strncasecmp(dfs_host, tcp_host, dfs_host_len) != 0) {
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cifs_dbg(FYI, "%s: skipping %.*s, doesn't match %.*s",
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__func__,
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(int)dfs_host_len, dfs_host,
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(int)tcp_host_len, tcp_host);
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continue;
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}
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scnprintf(tree, MAX_TREE_SIZE, "\\%s", tgt);
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rc = SMB2_tcon(0, tcon->ses, tree, tcon, nlsc);
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if (!rc)
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break;
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if (rc == -EREMOTE)
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break;
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}
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if (!rc) {
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if (it)
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rc = dfs_cache_noreq_update_tgthint(tcon->dfs_path + 1,
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it);
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else
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rc = -ENOENT;
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}
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dfs_cache_free_tgts(&tl);
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out:
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kfree(tree);
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return rc;
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}
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#else
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static inline int __smb2_reconnect(const struct nls_table *nlsc,
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struct cifs_tcon *tcon)
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{
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return SMB2_tcon(0, tcon->ses, tcon->treeName, tcon, nlsc);
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}
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#endif
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static int
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smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon)
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{
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int rc;
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struct nls_table *nls_codepage;
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struct cifs_ses *ses;
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struct TCP_Server_Info *server;
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int retries;
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/*
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* SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
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* check for tcp and smb session status done differently
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* for those three - in the calling routine.
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*/
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if (tcon == NULL)
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return 0;
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if (smb2_command == SMB2_TREE_CONNECT)
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return 0;
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if (tcon->tidStatus == CifsExiting) {
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/*
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* only tree disconnect, open, and write,
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* (and ulogoff which does not have tcon)
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* are allowed as we start force umount.
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*/
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if ((smb2_command != SMB2_WRITE) &&
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(smb2_command != SMB2_CREATE) &&
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(smb2_command != SMB2_TREE_DISCONNECT)) {
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cifs_dbg(FYI, "can not send cmd %d while umounting\n",
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smb2_command);
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return -ENODEV;
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}
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}
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if ((!tcon->ses) || (tcon->ses->status == CifsExiting) ||
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(!tcon->ses->server))
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return -EIO;
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ses = tcon->ses;
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server = ses->server;
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retries = server->nr_targets;
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/*
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* Give demultiplex thread up to 10 seconds to each target available for
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* reconnect -- should be greater than cifs socket timeout which is 7
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* seconds.
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*/
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while (server->tcpStatus == CifsNeedReconnect) {
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/*
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* Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
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* here since they are implicitly done when session drops.
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*/
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switch (smb2_command) {
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/*
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* BB Should we keep oplock break and add flush to exceptions?
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*/
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case SMB2_TREE_DISCONNECT:
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case SMB2_CANCEL:
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case SMB2_CLOSE:
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case SMB2_OPLOCK_BREAK:
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return -EAGAIN;
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}
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|
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rc = wait_event_interruptible_timeout(server->response_q,
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(server->tcpStatus != CifsNeedReconnect),
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10 * HZ);
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if (rc < 0) {
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cifs_dbg(FYI, "%s: aborting reconnect due to a received"
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" signal by the process\n", __func__);
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return -ERESTARTSYS;
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}
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/* are we still trying to reconnect? */
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if (server->tcpStatus != CifsNeedReconnect)
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break;
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if (retries && --retries)
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continue;
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/*
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* on "soft" mounts we wait once. Hard mounts keep
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* retrying until process is killed or server comes
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* back on-line
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*/
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if (!tcon->retry) {
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cifs_dbg(FYI, "gave up waiting on reconnect in smb_init\n");
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return -EHOSTDOWN;
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}
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retries = server->nr_targets;
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}
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if (!tcon->ses->need_reconnect && !tcon->need_reconnect)
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return 0;
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nls_codepage = load_nls_default();
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|
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/*
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* need to prevent multiple threads trying to simultaneously reconnect
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* the same SMB session
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*/
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mutex_lock(&tcon->ses->session_mutex);
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/*
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* Recheck after acquire mutex. If another thread is negotiating
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* and the server never sends an answer the socket will be closed
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* and tcpStatus set to reconnect.
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*/
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if (server->tcpStatus == CifsNeedReconnect) {
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rc = -EHOSTDOWN;
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mutex_unlock(&tcon->ses->session_mutex);
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goto out;
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}
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rc = cifs_negotiate_protocol(0, tcon->ses);
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if (!rc && tcon->ses->need_reconnect) {
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rc = cifs_setup_session(0, tcon->ses, nls_codepage);
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if ((rc == -EACCES) && !tcon->retry) {
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rc = -EHOSTDOWN;
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mutex_unlock(&tcon->ses->session_mutex);
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goto failed;
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}
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}
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if (rc || !tcon->need_reconnect) {
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mutex_unlock(&tcon->ses->session_mutex);
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goto out;
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}
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|
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cifs_mark_open_files_invalid(tcon);
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if (tcon->use_persistent)
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tcon->need_reopen_files = true;
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rc = __smb2_reconnect(nls_codepage, tcon);
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mutex_unlock(&tcon->ses->session_mutex);
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cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc);
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if (rc) {
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/* If sess reconnected but tcon didn't, something strange ... */
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printk_once(KERN_WARNING "reconnect tcon failed rc = %d\n", rc);
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goto out;
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}
|
|
|
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if (smb2_command != SMB2_INTERNAL_CMD)
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queue_delayed_work(cifsiod_wq, &server->reconnect, 0);
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|
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atomic_inc(&tconInfoReconnectCount);
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out:
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/*
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* Check if handle based operation so we know whether we can continue
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* or not without returning to caller to reset file handle.
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*/
|
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/*
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* BB Is flush done by server on drop of tcp session? Should we special
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* case it and skip above?
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*/
|
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switch (smb2_command) {
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case SMB2_FLUSH:
|
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case SMB2_READ:
|
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case SMB2_WRITE:
|
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case SMB2_LOCK:
|
|
case SMB2_IOCTL:
|
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case SMB2_QUERY_DIRECTORY:
|
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case SMB2_CHANGE_NOTIFY:
|
|
case SMB2_QUERY_INFO:
|
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case SMB2_SET_INFO:
|
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rc = -EAGAIN;
|
|
}
|
|
failed:
|
|
unload_nls(nls_codepage);
|
|
return rc;
|
|
}
|
|
|
|
static void
|
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fill_small_buf(__le16 smb2_command, struct cifs_tcon *tcon, void *buf,
|
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unsigned int *total_len)
|
|
{
|
|
struct smb2_sync_pdu *spdu = (struct smb2_sync_pdu *)buf;
|
|
/* lookup word count ie StructureSize from table */
|
|
__u16 parmsize = smb2_req_struct_sizes[le16_to_cpu(smb2_command)];
|
|
|
|
/*
|
|
* smaller than SMALL_BUFFER_SIZE but bigger than fixed area of
|
|
* largest operations (Create)
|
|
*/
|
|
memset(buf, 0, 256);
|
|
|
|
smb2_hdr_assemble(&spdu->sync_hdr, smb2_command, tcon);
|
|
spdu->StructureSize2 = cpu_to_le16(parmsize);
|
|
|
|
*total_len = parmsize + sizeof(struct smb2_sync_hdr);
|
|
}
|
|
|
|
/*
|
|
* 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 __smb2_plain_req_init(__le16 smb2_command, struct cifs_tcon *tcon,
|
|
void **request_buf, unsigned int *total_len)
|
|
{
|
|
/* BB eventually switch this to SMB2 specific small buf size */
|
|
if (smb2_command == SMB2_SET_INFO)
|
|
*request_buf = cifs_buf_get();
|
|
else
|
|
*request_buf = cifs_small_buf_get();
|
|
if (*request_buf == NULL) {
|
|
/* BB should we add a retry in here if not a writepage? */
|
|
return -ENOMEM;
|
|
}
|
|
|
|
fill_small_buf(smb2_command, tcon,
|
|
(struct smb2_sync_hdr *)(*request_buf),
|
|
total_len);
|
|
|
|
if (tcon != NULL) {
|
|
uint16_t com_code = le16_to_cpu(smb2_command);
|
|
cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]);
|
|
cifs_stats_inc(&tcon->num_smbs_sent);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int smb2_plain_req_init(__le16 smb2_command, struct cifs_tcon *tcon,
|
|
void **request_buf, unsigned int *total_len)
|
|
{
|
|
int rc;
|
|
|
|
rc = smb2_reconnect(smb2_command, tcon);
|
|
if (rc)
|
|
return rc;
|
|
|
|
return __smb2_plain_req_init(smb2_command, tcon, request_buf,
|
|
total_len);
|
|
}
|
|
|
|
static int smb2_ioctl_req_init(u32 opcode, struct cifs_tcon *tcon,
|
|
void **request_buf, unsigned int *total_len)
|
|
{
|
|
/* Skip reconnect only for FSCTL_VALIDATE_NEGOTIATE_INFO IOCTLs */
|
|
if (opcode == FSCTL_VALIDATE_NEGOTIATE_INFO) {
|
|
return __smb2_plain_req_init(SMB2_IOCTL, tcon, request_buf,
|
|
total_len);
|
|
}
|
|
return smb2_plain_req_init(SMB2_IOCTL, tcon, request_buf, total_len);
|
|
}
|
|
|
|
/* For explanation of negotiate contexts see MS-SMB2 section 2.2.3.1 */
|
|
|
|
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_compression_ctxt(struct smb2_compression_capabilities_context *pneg_ctxt)
|
|
{
|
|
pneg_ctxt->ContextType = SMB2_COMPRESSION_CAPABILITIES;
|
|
pneg_ctxt->DataLength =
|
|
cpu_to_le16(sizeof(struct smb2_compression_capabilities_context)
|
|
- sizeof(struct smb2_neg_context));
|
|
pneg_ctxt->CompressionAlgorithmCount = cpu_to_le16(3);
|
|
pneg_ctxt->CompressionAlgorithms[0] = SMB3_COMPRESS_LZ77;
|
|
pneg_ctxt->CompressionAlgorithms[1] = SMB3_COMPRESS_LZ77_HUFF;
|
|
pneg_ctxt->CompressionAlgorithms[2] = SMB3_COMPRESS_LZNT1;
|
|
}
|
|
|
|
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); /* Cipher Count + two ciphers */
|
|
pneg_ctxt->CipherCount = cpu_to_le16(2);
|
|
pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM;
|
|
pneg_ctxt->Ciphers[1] = SMB2_ENCRYPTION_AES128_CCM;
|
|
}
|
|
|
|
static unsigned int
|
|
build_netname_ctxt(struct smb2_netname_neg_context *pneg_ctxt, char *hostname)
|
|
{
|
|
struct nls_table *cp = load_nls_default();
|
|
|
|
pneg_ctxt->ContextType = SMB2_NETNAME_NEGOTIATE_CONTEXT_ID;
|
|
|
|
/* copy up to max of first 100 bytes of server name to NetName field */
|
|
pneg_ctxt->DataLength = cpu_to_le16(2 * cifs_strtoUTF16(pneg_ctxt->NetName, hostname, 100, cp));
|
|
/* context size is DataLength + minimal smb2_neg_context */
|
|
return DIV_ROUND_UP(le16_to_cpu(pneg_ctxt->DataLength) +
|
|
sizeof(struct smb2_neg_context), 8) * 8;
|
|
}
|
|
|
|
static void
|
|
build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt)
|
|
{
|
|
pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE;
|
|
pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN);
|
|
/* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
|
|
pneg_ctxt->Name[0] = 0x93;
|
|
pneg_ctxt->Name[1] = 0xAD;
|
|
pneg_ctxt->Name[2] = 0x25;
|
|
pneg_ctxt->Name[3] = 0x50;
|
|
pneg_ctxt->Name[4] = 0x9C;
|
|
pneg_ctxt->Name[5] = 0xB4;
|
|
pneg_ctxt->Name[6] = 0x11;
|
|
pneg_ctxt->Name[7] = 0xE7;
|
|
pneg_ctxt->Name[8] = 0xB4;
|
|
pneg_ctxt->Name[9] = 0x23;
|
|
pneg_ctxt->Name[10] = 0x83;
|
|
pneg_ctxt->Name[11] = 0xDE;
|
|
pneg_ctxt->Name[12] = 0x96;
|
|
pneg_ctxt->Name[13] = 0x8B;
|
|
pneg_ctxt->Name[14] = 0xCD;
|
|
pneg_ctxt->Name[15] = 0x7C;
|
|
}
|
|
|
|
static void
|
|
assemble_neg_contexts(struct smb2_negotiate_req *req,
|
|
struct TCP_Server_Info *server, unsigned int *total_len)
|
|
{
|
|
char *pneg_ctxt;
|
|
unsigned int ctxt_len;
|
|
|
|
if (*total_len > 200) {
|
|
/* In case length corrupted don't want to overrun smb buffer */
|
|
cifs_server_dbg(VFS, "Bad frame length assembling neg contexts\n");
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* round up total_len of fixed part of SMB3 negotiate request to 8
|
|
* byte boundary before adding negotiate contexts
|
|
*/
|
|
*total_len = roundup(*total_len, 8);
|
|
|
|
pneg_ctxt = (*total_len) + (char *)req;
|
|
req->NegotiateContextOffset = cpu_to_le32(*total_len);
|
|
|
|
build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt);
|
|
ctxt_len = DIV_ROUND_UP(sizeof(struct smb2_preauth_neg_context), 8) * 8;
|
|
*total_len += ctxt_len;
|
|
pneg_ctxt += ctxt_len;
|
|
|
|
build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt);
|
|
ctxt_len = DIV_ROUND_UP(sizeof(struct smb2_encryption_neg_context), 8) * 8;
|
|
*total_len += ctxt_len;
|
|
pneg_ctxt += ctxt_len;
|
|
|
|
if (server->compress_algorithm) {
|
|
build_compression_ctxt((struct smb2_compression_capabilities_context *)
|
|
pneg_ctxt);
|
|
ctxt_len = DIV_ROUND_UP(
|
|
sizeof(struct smb2_compression_capabilities_context),
|
|
8) * 8;
|
|
*total_len += ctxt_len;
|
|
pneg_ctxt += ctxt_len;
|
|
req->NegotiateContextCount = cpu_to_le16(5);
|
|
} else
|
|
req->NegotiateContextCount = cpu_to_le16(4);
|
|
|
|
ctxt_len = build_netname_ctxt((struct smb2_netname_neg_context *)pneg_ctxt,
|
|
server->hostname);
|
|
*total_len += ctxt_len;
|
|
pneg_ctxt += ctxt_len;
|
|
|
|
build_posix_ctxt((struct smb2_posix_neg_context *)pneg_ctxt);
|
|
*total_len += sizeof(struct smb2_posix_neg_context);
|
|
}
|
|
|
|
static void decode_preauth_context(struct smb2_preauth_neg_context *ctxt)
|
|
{
|
|
unsigned int len = le16_to_cpu(ctxt->DataLength);
|
|
|
|
/* If invalid preauth context warn but use what we requested, SHA-512 */
|
|
if (len < MIN_PREAUTH_CTXT_DATA_LEN) {
|
|
printk_once(KERN_WARNING "server sent bad preauth context\n");
|
|
return;
|
|
}
|
|
if (le16_to_cpu(ctxt->HashAlgorithmCount) != 1)
|
|
printk_once(KERN_WARNING "illegal SMB3 hash algorithm count\n");
|
|
if (ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512)
|
|
printk_once(KERN_WARNING "unknown SMB3 hash algorithm\n");
|
|
}
|
|
|
|
static void decode_compress_ctx(struct TCP_Server_Info *server,
|
|
struct smb2_compression_capabilities_context *ctxt)
|
|
{
|
|
unsigned int len = le16_to_cpu(ctxt->DataLength);
|
|
|
|
/* sizeof compress context is a one element compression capbility struct */
|
|
if (len < 10) {
|
|
printk_once(KERN_WARNING "server sent bad compression cntxt\n");
|
|
return;
|
|
}
|
|
if (le16_to_cpu(ctxt->CompressionAlgorithmCount) != 1) {
|
|
printk_once(KERN_WARNING "illegal SMB3 compress algorithm count\n");
|
|
return;
|
|
}
|
|
if (le16_to_cpu(ctxt->CompressionAlgorithms[0]) > 3) {
|
|
printk_once(KERN_WARNING "unknown compression algorithm\n");
|
|
return;
|
|
}
|
|
server->compress_algorithm = ctxt->CompressionAlgorithms[0];
|
|
}
|
|
|
|
static int decode_encrypt_ctx(struct TCP_Server_Info *server,
|
|
struct smb2_encryption_neg_context *ctxt)
|
|
{
|
|
unsigned int len = le16_to_cpu(ctxt->DataLength);
|
|
|
|
cifs_dbg(FYI, "decode SMB3.11 encryption neg context of len %d\n", len);
|
|
if (len < MIN_ENCRYPT_CTXT_DATA_LEN) {
|
|
printk_once(KERN_WARNING "server sent bad crypto ctxt len\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (le16_to_cpu(ctxt->CipherCount) != 1) {
|
|
printk_once(KERN_WARNING "illegal SMB3.11 cipher count\n");
|
|
return -EINVAL;
|
|
}
|
|
cifs_dbg(FYI, "SMB311 cipher type:%d\n", le16_to_cpu(ctxt->Ciphers[0]));
|
|
if ((ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES128_CCM) &&
|
|
(ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES128_GCM)) {
|
|
printk_once(KERN_WARNING "invalid SMB3.11 cipher returned\n");
|
|
return -EINVAL;
|
|
}
|
|
server->cipher_type = ctxt->Ciphers[0];
|
|
server->capabilities |= SMB2_GLOBAL_CAP_ENCRYPTION;
|
|
return 0;
|
|
}
|
|
|
|
static int smb311_decode_neg_context(struct smb2_negotiate_rsp *rsp,
|
|
struct TCP_Server_Info *server,
|
|
unsigned int len_of_smb)
|
|
{
|
|
struct smb2_neg_context *pctx;
|
|
unsigned int offset = le32_to_cpu(rsp->NegotiateContextOffset);
|
|
unsigned int ctxt_cnt = le16_to_cpu(rsp->NegotiateContextCount);
|
|
unsigned int len_of_ctxts, i;
|
|
int rc = 0;
|
|
|
|
cifs_dbg(FYI, "decoding %d negotiate contexts\n", ctxt_cnt);
|
|
if (len_of_smb <= offset) {
|
|
cifs_server_dbg(VFS, "Invalid response: negotiate context offset\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
len_of_ctxts = len_of_smb - offset;
|
|
|
|
for (i = 0; i < ctxt_cnt; i++) {
|
|
int clen;
|
|
/* check that offset is not beyond end of SMB */
|
|
if (len_of_ctxts == 0)
|
|
break;
|
|
|
|
if (len_of_ctxts < sizeof(struct smb2_neg_context))
|
|
break;
|
|
|
|
pctx = (struct smb2_neg_context *)(offset + (char *)rsp);
|
|
clen = le16_to_cpu(pctx->DataLength);
|
|
if (clen > len_of_ctxts)
|
|
break;
|
|
|
|
if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES)
|
|
decode_preauth_context(
|
|
(struct smb2_preauth_neg_context *)pctx);
|
|
else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES)
|
|
rc = decode_encrypt_ctx(server,
|
|
(struct smb2_encryption_neg_context *)pctx);
|
|
else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES)
|
|
decode_compress_ctx(server,
|
|
(struct smb2_compression_capabilities_context *)pctx);
|
|
else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE)
|
|
server->posix_ext_supported = true;
|
|
else
|
|
cifs_server_dbg(VFS, "unknown negcontext of type %d ignored\n",
|
|
le16_to_cpu(pctx->ContextType));
|
|
|
|
if (rc)
|
|
break;
|
|
/* offsets must be 8 byte aligned */
|
|
clen = (clen + 7) & ~0x7;
|
|
offset += clen + sizeof(struct smb2_neg_context);
|
|
len_of_ctxts -= clen;
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
static struct create_posix *
|
|
create_posix_buf(umode_t mode)
|
|
{
|
|
struct create_posix *buf;
|
|
|
|
buf = kzalloc(sizeof(struct create_posix),
|
|
GFP_KERNEL);
|
|
if (!buf)
|
|
return NULL;
|
|
|
|
buf->ccontext.DataOffset =
|
|
cpu_to_le16(offsetof(struct create_posix, Mode));
|
|
buf->ccontext.DataLength = cpu_to_le32(4);
|
|
buf->ccontext.NameOffset =
|
|
cpu_to_le16(offsetof(struct create_posix, Name));
|
|
buf->ccontext.NameLength = cpu_to_le16(16);
|
|
|
|
/* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
|
|
buf->Name[0] = 0x93;
|
|
buf->Name[1] = 0xAD;
|
|
buf->Name[2] = 0x25;
|
|
buf->Name[3] = 0x50;
|
|
buf->Name[4] = 0x9C;
|
|
buf->Name[5] = 0xB4;
|
|
buf->Name[6] = 0x11;
|
|
buf->Name[7] = 0xE7;
|
|
buf->Name[8] = 0xB4;
|
|
buf->Name[9] = 0x23;
|
|
buf->Name[10] = 0x83;
|
|
buf->Name[11] = 0xDE;
|
|
buf->Name[12] = 0x96;
|
|
buf->Name[13] = 0x8B;
|
|
buf->Name[14] = 0xCD;
|
|
buf->Name[15] = 0x7C;
|
|
buf->Mode = cpu_to_le32(mode);
|
|
cifs_dbg(FYI, "mode on posix create 0%o", mode);
|
|
return buf;
|
|
}
|
|
|
|
static int
|
|
add_posix_context(struct kvec *iov, unsigned int *num_iovec, umode_t mode)
|
|
{
|
|
struct smb2_create_req *req = iov[0].iov_base;
|
|
unsigned int num = *num_iovec;
|
|
|
|
iov[num].iov_base = create_posix_buf(mode);
|
|
if (mode == ACL_NO_MODE)
|
|
cifs_dbg(FYI, "illegal mode\n");
|
|
if (iov[num].iov_base == NULL)
|
|
return -ENOMEM;
|
|
iov[num].iov_len = sizeof(struct create_posix);
|
|
if (!req->CreateContextsOffset)
|
|
req->CreateContextsOffset = cpu_to_le32(
|
|
sizeof(struct smb2_create_req) +
|
|
iov[num - 1].iov_len);
|
|
le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_posix));
|
|
*num_iovec = num + 1;
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
*
|
|
* 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 smb_rqst rqst;
|
|
struct smb2_negotiate_req *req;
|
|
struct smb2_negotiate_rsp *rsp;
|
|
struct kvec iov[1];
|
|
struct kvec rsp_iov;
|
|
int rc = 0;
|
|
int resp_buftype;
|
|
struct TCP_Server_Info *server = cifs_ses_server(ses);
|
|
int blob_offset, blob_length;
|
|
char *security_blob;
|
|
int flags = CIFS_NEG_OP;
|
|
unsigned int total_len;
|
|
|
|
cifs_dbg(FYI, "Negotiate protocol\n");
|
|
|
|
if (!server) {
|
|
WARN(1, "%s: server is NULL!\n", __func__);
|
|
return -EIO;
|
|
}
|
|
|
|
rc = smb2_plain_req_init(SMB2_NEGOTIATE, NULL, (void **) &req, &total_len);
|
|
if (rc)
|
|
return rc;
|
|
|
|
req->sync_hdr.SessionId = 0;
|
|
|
|
memset(server->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE);
|
|
memset(ses->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE);
|
|
|
|
if (strcmp(server->vals->version_string,
|
|
SMB3ANY_VERSION_STRING) == 0) {
|
|
req->Dialects[0] = cpu_to_le16(SMB30_PROT_ID);
|
|
req->Dialects[1] = cpu_to_le16(SMB302_PROT_ID);
|
|
req->DialectCount = cpu_to_le16(2);
|
|
total_len += 4;
|
|
} else if (strcmp(server->vals->version_string,
|
|
SMBDEFAULT_VERSION_STRING) == 0) {
|
|
req->Dialects[0] = cpu_to_le16(SMB21_PROT_ID);
|
|
req->Dialects[1] = cpu_to_le16(SMB30_PROT_ID);
|
|
req->Dialects[2] = cpu_to_le16(SMB302_PROT_ID);
|
|
req->Dialects[3] = cpu_to_le16(SMB311_PROT_ID);
|
|
req->DialectCount = cpu_to_le16(4);
|
|
total_len += 8;
|
|
} else {
|
|
/* otherwise send specific dialect */
|
|
req->Dialects[0] = cpu_to_le16(server->vals->protocol_id);
|
|
req->DialectCount = cpu_to_le16(1);
|
|
total_len += 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(server->vals->req_capabilities);
|
|
|
|
/* ClientGUID must be zero for SMB2.02 dialect */
|
|
if (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 ((server->vals->protocol_id == SMB311_PROT_ID) ||
|
|
(strcmp(server->vals->version_string,
|
|
SMBDEFAULT_VERSION_STRING) == 0))
|
|
assemble_neg_contexts(req, server, &total_len);
|
|
}
|
|
iov[0].iov_base = (char *)req;
|
|
iov[0].iov_len = total_len;
|
|
|
|
memset(&rqst, 0, sizeof(struct smb_rqst));
|
|
rqst.rq_iov = iov;
|
|
rqst.rq_nvec = 1;
|
|
|
|
rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
|
|
cifs_small_buf_release(req);
|
|
rsp = (struct smb2_negotiate_rsp *)rsp_iov.iov_base;
|
|
/*
|
|
* No tcon so can't do
|
|
* cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
|
|
*/
|
|
if (rc == -EOPNOTSUPP) {
|
|
cifs_server_dbg(VFS, "Dialect not supported by server. Consider "
|
|
"specifying vers=1.0 or vers=2.0 on mount for accessing"
|
|
" older servers\n");
|
|
goto neg_exit;
|
|
} else if (rc != 0)
|
|
goto neg_exit;
|
|
|
|
if (strcmp(server->vals->version_string,
|
|
SMB3ANY_VERSION_STRING) == 0) {
|
|
if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) {
|
|
cifs_server_dbg(VFS,
|
|
"SMB2 dialect returned but not requested\n");
|
|
return -EIO;
|
|
} else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) {
|
|
cifs_server_dbg(VFS,
|
|
"SMB2.1 dialect returned but not requested\n");
|
|
return -EIO;
|
|
}
|
|
} else if (strcmp(server->vals->version_string,
|
|
SMBDEFAULT_VERSION_STRING) == 0) {
|
|
if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) {
|
|
cifs_server_dbg(VFS,
|
|
"SMB2 dialect returned but not requested\n");
|
|
return -EIO;
|
|
} else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) {
|
|
/* ops set to 3.0 by default for default so update */
|
|
server->ops = &smb21_operations;
|
|
server->vals = &smb21_values;
|
|
} else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) {
|
|
server->ops = &smb311_operations;
|
|
server->vals = &smb311_values;
|
|
}
|
|
} else if (le16_to_cpu(rsp->DialectRevision) !=
|
|
server->vals->protocol_id) {
|
|
/* if requested single dialect ensure returned dialect matched */
|
|
cifs_server_dbg(VFS, "Illegal 0x%x dialect returned: not requested\n",
|
|
le16_to_cpu(rsp->DialectRevision));
|
|
return -EIO;
|
|
}
|
|
|
|
cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode);
|
|
|
|
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");
|
|
else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID))
|
|
cifs_dbg(FYI, "negotiated smb3.1.1 dialect\n");
|
|
else {
|
|
cifs_server_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);
|
|
|
|
/*
|
|
* Keep a copy of the hash after negprot. This hash will be
|
|
* the starting hash value for all sessions made from this
|
|
* server.
|
|
*/
|
|
memcpy(server->preauth_sha_hash, ses->preauth_sha_hash,
|
|
SMB2_PREAUTH_HASH_SIZE);
|
|
|
|
/* 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);
|
|
server->sec_mode = le16_to_cpu(rsp->SecurityMode);
|
|
if ((server->sec_mode & SMB2_SEC_MODE_FLAGS_ALL) != server->sec_mode)
|
|
cifs_dbg(FYI, "Server returned unexpected security mode 0x%x\n",
|
|
server->sec_mode);
|
|
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,
|
|
(struct smb2_sync_hdr *)rsp);
|
|
/*
|
|
* 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");
|
|
server->sec_ntlmssp = true;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) {
|
|
if (rsp->NegotiateContextCount)
|
|
rc = smb311_decode_neg_context(rsp, server,
|
|
rsp_iov.iov_len);
|
|
else
|
|
cifs_server_dbg(VFS, "Missing expected negotiate contexts\n");
|
|
}
|
|
neg_exit:
|
|
free_rsp_buf(resp_buftype, rsp);
|
|
return rc;
|
|
}
|
|
|
|
int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon)
|
|
{
|
|
int rc;
|
|
struct validate_negotiate_info_req *pneg_inbuf;
|
|
struct validate_negotiate_info_rsp *pneg_rsp = NULL;
|
|
u32 rsplen;
|
|
u32 inbuflen; /* max of 4 dialects */
|
|
struct TCP_Server_Info *server = tcon->ses->server;
|
|
|
|
cifs_dbg(FYI, "validate negotiate\n");
|
|
|
|
/* In SMB3.11 preauth integrity supersedes validate negotiate */
|
|
if (server->dialect == SMB311_PROT_ID)
|
|
return 0;
|
|
|
|
/*
|
|
* validation ioctl must be signed, so no point sending this if we
|
|
* can not sign it (ie are not known user). Even if signing is not
|
|
* required (enabled but not negotiated), in those cases we selectively
|
|
* sign just this, the first and only signed request on a connection.
|
|
* Having validation of negotiate info helps reduce attack vectors.
|
|
*/
|
|
if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
|
|
return 0; /* validation requires signing */
|
|
|
|
if (tcon->ses->user_name == NULL) {
|
|
cifs_dbg(FYI, "Can't validate negotiate: null user mount\n");
|
|
return 0; /* validation requires signing */
|
|
}
|
|
|
|
if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
|
|
cifs_tcon_dbg(VFS, "Unexpected null user (anonymous) auth flag sent by server\n");
|
|
|
|
pneg_inbuf = kmalloc(sizeof(*pneg_inbuf), GFP_NOFS);
|
|
if (!pneg_inbuf)
|
|
return -ENOMEM;
|
|
|
|
pneg_inbuf->Capabilities =
|
|
cpu_to_le32(server->vals->req_capabilities);
|
|
memcpy(pneg_inbuf->Guid, server->client_guid,
|
|
SMB2_CLIENT_GUID_SIZE);
|
|
|
|
if (tcon->ses->sign)
|
|
pneg_inbuf->SecurityMode =
|
|
cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
|
|
else if (global_secflags & CIFSSEC_MAY_SIGN)
|
|
pneg_inbuf->SecurityMode =
|
|
cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
|
|
else
|
|
pneg_inbuf->SecurityMode = 0;
|
|
|
|
|
|
if (strcmp(server->vals->version_string,
|
|
SMB3ANY_VERSION_STRING) == 0) {
|
|
pneg_inbuf->Dialects[0] = cpu_to_le16(SMB30_PROT_ID);
|
|
pneg_inbuf->Dialects[1] = cpu_to_le16(SMB302_PROT_ID);
|
|
pneg_inbuf->DialectCount = cpu_to_le16(2);
|
|
/* structure is big enough for 3 dialects, sending only 2 */
|
|
inbuflen = sizeof(*pneg_inbuf) -
|
|
(2 * sizeof(pneg_inbuf->Dialects[0]));
|
|
} else if (strcmp(server->vals->version_string,
|
|
SMBDEFAULT_VERSION_STRING) == 0) {
|
|
pneg_inbuf->Dialects[0] = cpu_to_le16(SMB21_PROT_ID);
|
|
pneg_inbuf->Dialects[1] = cpu_to_le16(SMB30_PROT_ID);
|
|
pneg_inbuf->Dialects[2] = cpu_to_le16(SMB302_PROT_ID);
|
|
pneg_inbuf->Dialects[3] = cpu_to_le16(SMB311_PROT_ID);
|
|
pneg_inbuf->DialectCount = cpu_to_le16(4);
|
|
/* structure is big enough for 3 dialects */
|
|
inbuflen = sizeof(*pneg_inbuf);
|
|
} else {
|
|
/* otherwise specific dialect was requested */
|
|
pneg_inbuf->Dialects[0] =
|
|
cpu_to_le16(server->vals->protocol_id);
|
|
pneg_inbuf->DialectCount = cpu_to_le16(1);
|
|
/* structure is big enough for 3 dialects, sending only 1 */
|
|
inbuflen = sizeof(*pneg_inbuf) -
|
|
sizeof(pneg_inbuf->Dialects[0]) * 2;
|
|
}
|
|
|
|
rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
|
|
FSCTL_VALIDATE_NEGOTIATE_INFO, true /* is_fsctl */,
|
|
(char *)pneg_inbuf, inbuflen, CIFSMaxBufSize,
|
|
(char **)&pneg_rsp, &rsplen);
|
|
if (rc == -EOPNOTSUPP) {
|
|
/*
|
|
* Old Windows versions or Netapp SMB server can return
|
|
* not supported error. Client should accept it.
|
|
*/
|
|
cifs_tcon_dbg(VFS, "Server does not support validate negotiate\n");
|
|
rc = 0;
|
|
goto out_free_inbuf;
|
|
} else if (rc != 0) {
|
|
cifs_tcon_dbg(VFS, "validate protocol negotiate failed: %d\n", rc);
|
|
rc = -EIO;
|
|
goto out_free_inbuf;
|
|
}
|
|
|
|
rc = -EIO;
|
|
if (rsplen != sizeof(*pneg_rsp)) {
|
|
cifs_tcon_dbg(VFS, "invalid protocol negotiate response size: %d\n",
|
|
rsplen);
|
|
|
|
/* relax check since Mac returns max bufsize allowed on ioctl */
|
|
if (rsplen > CIFSMaxBufSize || rsplen < sizeof(*pneg_rsp))
|
|
goto out_free_rsp;
|
|
}
|
|
|
|
/* check validate negotiate info response matches what we got earlier */
|
|
if (pneg_rsp->Dialect != cpu_to_le16(server->dialect))
|
|
goto vneg_out;
|
|
|
|
if (pneg_rsp->SecurityMode != cpu_to_le16(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) != server->capabilities)
|
|
goto vneg_out;
|
|
|
|
/* validate negotiate successful */
|
|
rc = 0;
|
|
cifs_dbg(FYI, "validate negotiate info successful\n");
|
|
goto out_free_rsp;
|
|
|
|
vneg_out:
|
|
cifs_tcon_dbg(VFS, "protocol revalidation - security settings mismatch\n");
|
|
out_free_rsp:
|
|
kfree(pneg_rsp);
|
|
out_free_inbuf:
|
|
kfree(pneg_inbuf);
|
|
return rc;
|
|
}
|
|
|
|
enum securityEnum
|
|
smb2_select_sectype(struct TCP_Server_Info *server, enum securityEnum requested)
|
|
{
|
|
switch (requested) {
|
|
case Kerberos:
|
|
case RawNTLMSSP:
|
|
return requested;
|
|
case NTLMv2:
|
|
return RawNTLMSSP;
|
|
case Unspecified:
|
|
if (server->sec_ntlmssp &&
|
|
(global_secflags & CIFSSEC_MAY_NTLMSSP))
|
|
return RawNTLMSSP;
|
|
if ((server->sec_kerberos || server->sec_mskerberos) &&
|
|
(global_secflags & CIFSSEC_MAY_KRB5))
|
|
return Kerberos;
|
|
/* Fallthrough */
|
|
default:
|
|
return Unspecified;
|
|
}
|
|
}
|
|
|
|
struct SMB2_sess_data {
|
|
unsigned int xid;
|
|
struct cifs_ses *ses;
|
|
struct nls_table *nls_cp;
|
|
void (*func)(struct SMB2_sess_data *);
|
|
int result;
|
|
u64 previous_session;
|
|
|
|
/* we will send the SMB in three pieces:
|
|
* a fixed length beginning part, an optional
|
|
* SPNEGO blob (which can be zero length), and a
|
|
* last part which will include the strings
|
|
* and rest of bcc area. This allows us to avoid
|
|
* a large buffer 17K allocation
|
|
*/
|
|
int buf0_type;
|
|
struct kvec iov[2];
|
|
};
|
|
|
|
static int
|
|
SMB2_sess_alloc_buffer(struct SMB2_sess_data *sess_data)
|
|
{
|
|
int rc;
|
|
struct cifs_ses *ses = sess_data->ses;
|
|
struct smb2_sess_setup_req *req;
|
|
struct TCP_Server_Info *server = cifs_ses_server(ses);
|
|
unsigned int total_len;
|
|
|
|
rc = smb2_plain_req_init(SMB2_SESSION_SETUP, NULL, (void **) &req,
|
|
&total_len);
|
|
if (rc)
|
|
return rc;
|
|
|
|
if (sess_data->ses->binding) {
|
|
req->sync_hdr.SessionId = sess_data->ses->Suid;
|
|
req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
|
|
req->PreviousSessionId = 0;
|
|
req->Flags = SMB2_SESSION_REQ_FLAG_BINDING;
|
|
} else {
|
|
/* First session, not a reauthenticate */
|
|
req->sync_hdr.SessionId = 0;
|
|
/*
|
|
* if reconnect, we need to send previous sess id
|
|
* otherwise it is 0
|
|
*/
|
|
req->PreviousSessionId = sess_data->previous_session;
|
|
req->Flags = 0; /* MBZ */
|
|
}
|
|
|
|
/* enough to enable echos and oplocks and one max size write */
|
|
req->sync_hdr.CreditRequest = cpu_to_le16(130);
|
|
|
|
/* 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;
|
|
|
|
#ifdef CONFIG_CIFS_DFS_UPCALL
|
|
req->Capabilities = cpu_to_le32(SMB2_GLOBAL_CAP_DFS);
|
|
#else
|
|
req->Capabilities = 0;
|
|
#endif /* DFS_UPCALL */
|
|
|
|
req->Channel = 0; /* MBZ */
|
|
|
|
sess_data->iov[0].iov_base = (char *)req;
|
|
/* 1 for pad */
|
|
sess_data->iov[0].iov_len = total_len - 1;
|
|
/*
|
|
* This variable will be used to clear the buffer
|
|
* allocated above in case of any error in the calling function.
|
|
*/
|
|
sess_data->buf0_type = CIFS_SMALL_BUFFER;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
SMB2_sess_free_buffer(struct SMB2_sess_data *sess_data)
|
|
{
|
|
free_rsp_buf(sess_data->buf0_type, sess_data->iov[0].iov_base);
|
|
sess_data->buf0_type = CIFS_NO_BUFFER;
|
|
}
|
|
|
|
static int
|
|
SMB2_sess_sendreceive(struct SMB2_sess_data *sess_data)
|
|
{
|
|
int rc;
|
|
struct smb_rqst rqst;
|
|
struct smb2_sess_setup_req *req = sess_data->iov[0].iov_base;
|
|
struct kvec rsp_iov = { NULL, 0 };
|
|
|
|
/* 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 */);
|
|
req->SecurityBufferLength = cpu_to_le16(sess_data->iov[1].iov_len);
|
|
|
|
memset(&rqst, 0, sizeof(struct smb_rqst));
|
|
rqst.rq_iov = sess_data->iov;
|
|
rqst.rq_nvec = 2;
|
|
|
|
/* BB add code to build os and lm fields */
|
|
rc = cifs_send_recv(sess_data->xid, sess_data->ses,
|
|
&rqst,
|
|
&sess_data->buf0_type,
|
|
CIFS_LOG_ERROR | CIFS_NEG_OP, &rsp_iov);
|
|
cifs_small_buf_release(sess_data->iov[0].iov_base);
|
|
memcpy(&sess_data->iov[0], &rsp_iov, sizeof(struct kvec));
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int
|
|
SMB2_sess_establish_session(struct SMB2_sess_data *sess_data)
|
|
{
|
|
int rc = 0;
|
|
struct cifs_ses *ses = sess_data->ses;
|
|
struct TCP_Server_Info *server = cifs_ses_server(ses);
|
|
|
|
mutex_lock(&server->srv_mutex);
|
|
if (server->ops->generate_signingkey) {
|
|
rc = server->ops->generate_signingkey(ses);
|
|
if (rc) {
|
|
cifs_dbg(FYI,
|
|
"SMB3 session key generation failed\n");
|
|
mutex_unlock(&server->srv_mutex);
|
|
return rc;
|
|
}
|
|
}
|
|
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");
|
|
/* keep existing ses state if binding */
|
|
if (!ses->binding) {
|
|
spin_lock(&GlobalMid_Lock);
|
|
ses->status = CifsGood;
|
|
ses->need_reconnect = false;
|
|
spin_unlock(&GlobalMid_Lock);
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
#ifdef CONFIG_CIFS_UPCALL
|
|
static void
|
|
SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
|
|
{
|
|
int rc;
|
|
struct cifs_ses *ses = sess_data->ses;
|
|
struct cifs_spnego_msg *msg;
|
|
struct key *spnego_key = NULL;
|
|
struct smb2_sess_setup_rsp *rsp = NULL;
|
|
|
|
rc = SMB2_sess_alloc_buffer(sess_data);
|
|
if (rc)
|
|
goto out;
|
|
|
|
spnego_key = cifs_get_spnego_key(ses);
|
|
if (IS_ERR(spnego_key)) {
|
|
rc = PTR_ERR(spnego_key);
|
|
spnego_key = NULL;
|
|
goto out;
|
|
}
|
|
|
|
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 out_put_spnego_key;
|
|
}
|
|
|
|
/* keep session key if binding */
|
|
if (!ses->binding) {
|
|
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 out_put_spnego_key;
|
|
}
|
|
ses->auth_key.len = msg->sesskey_len;
|
|
}
|
|
|
|
sess_data->iov[1].iov_base = msg->data + msg->sesskey_len;
|
|
sess_data->iov[1].iov_len = msg->secblob_len;
|
|
|
|
rc = SMB2_sess_sendreceive(sess_data);
|
|
if (rc)
|
|
goto out_put_spnego_key;
|
|
|
|
rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
|
|
/* keep session id and flags if binding */
|
|
if (!ses->binding) {
|
|
ses->Suid = rsp->sync_hdr.SessionId;
|
|
ses->session_flags = le16_to_cpu(rsp->SessionFlags);
|
|
}
|
|
|
|
rc = SMB2_sess_establish_session(sess_data);
|
|
out_put_spnego_key:
|
|
key_invalidate(spnego_key);
|
|
key_put(spnego_key);
|
|
out:
|
|
sess_data->result = rc;
|
|
sess_data->func = NULL;
|
|
SMB2_sess_free_buffer(sess_data);
|
|
}
|
|
#else
|
|
static void
|
|
SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
|
|
{
|
|
cifs_dbg(VFS, "Kerberos negotiated but upcall support disabled!\n");
|
|
sess_data->result = -EOPNOTSUPP;
|
|
sess_data->func = NULL;
|
|
}
|
|
#endif
|
|
|
|
static void
|
|
SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data);
|
|
|
|
static void
|
|
SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data *sess_data)
|
|
{
|
|
int rc;
|
|
struct cifs_ses *ses = sess_data->ses;
|
|
struct smb2_sess_setup_rsp *rsp = NULL;
|
|
char *ntlmssp_blob = NULL;
|
|
bool use_spnego = false; /* else use raw ntlmssp */
|
|
u16 blob_length = 0;
|
|
|
|
/*
|
|
* If memory allocation is successful, caller of this function
|
|
* frees it.
|
|
*/
|
|
ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
|
|
if (!ses->ntlmssp) {
|
|
rc = -ENOMEM;
|
|
goto out_err;
|
|
}
|
|
ses->ntlmssp->sesskey_per_smbsess = true;
|
|
|
|
rc = SMB2_sess_alloc_buffer(sess_data);
|
|
if (rc)
|
|
goto out_err;
|
|
|
|
ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE),
|
|
GFP_KERNEL);
|
|
if (ntlmssp_blob == NULL) {
|
|
rc = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
build_ntlmssp_negotiate_blob(ntlmssp_blob, ses);
|
|
if (use_spnego) {
|
|
/* BB eventually need to add this */
|
|
cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
|
|
rc = -EOPNOTSUPP;
|
|
goto out;
|
|
} else {
|
|
blob_length = sizeof(struct _NEGOTIATE_MESSAGE);
|
|
/* with raw NTLMSSP we don't encapsulate in SPNEGO */
|
|
}
|
|
sess_data->iov[1].iov_base = ntlmssp_blob;
|
|
sess_data->iov[1].iov_len = blob_length;
|
|
|
|
rc = SMB2_sess_sendreceive(sess_data);
|
|
rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
|
|
|
|
/* If true, rc here is expected and not an error */
|
|
if (sess_data->buf0_type != CIFS_NO_BUFFER &&
|
|
rsp->sync_hdr.Status == STATUS_MORE_PROCESSING_REQUIRED)
|
|
rc = 0;
|
|
|
|
if (rc)
|
|
goto out;
|
|
|
|
if (offsetof(struct smb2_sess_setup_rsp, Buffer) !=
|
|
le16_to_cpu(rsp->SecurityBufferOffset)) {
|
|
cifs_dbg(VFS, "Invalid security buffer offset %d\n",
|
|
le16_to_cpu(rsp->SecurityBufferOffset));
|
|
rc = -EIO;
|
|
goto out;
|
|
}
|
|
rc = decode_ntlmssp_challenge(rsp->Buffer,
|
|
le16_to_cpu(rsp->SecurityBufferLength), ses);
|
|
if (rc)
|
|
goto out;
|
|
|
|
cifs_dbg(FYI, "rawntlmssp session setup challenge phase\n");
|
|
|
|
/* keep existing ses id and flags if binding */
|
|
if (!ses->binding) {
|
|
ses->Suid = rsp->sync_hdr.SessionId;
|
|
ses->session_flags = le16_to_cpu(rsp->SessionFlags);
|
|
}
|
|
|
|
out:
|
|
kfree(ntlmssp_blob);
|
|
SMB2_sess_free_buffer(sess_data);
|
|
if (!rc) {
|
|
sess_data->result = 0;
|
|
sess_data->func = SMB2_sess_auth_rawntlmssp_authenticate;
|
|
return;
|
|
}
|
|
out_err:
|
|
kfree(ses->ntlmssp);
|
|
ses->ntlmssp = NULL;
|
|
sess_data->result = rc;
|
|
sess_data->func = NULL;
|
|
}
|
|
|
|
static void
|
|
SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data)
|
|
{
|
|
int rc;
|
|
struct cifs_ses *ses = sess_data->ses;
|
|
struct smb2_sess_setup_req *req;
|
|
struct smb2_sess_setup_rsp *rsp = NULL;
|
|
unsigned char *ntlmssp_blob = NULL;
|
|
bool use_spnego = false; /* else use raw ntlmssp */
|
|
u16 blob_length = 0;
|
|
|
|
rc = SMB2_sess_alloc_buffer(sess_data);
|
|
if (rc)
|
|
goto out;
|
|
|
|
req = (struct smb2_sess_setup_req *) sess_data->iov[0].iov_base;
|
|
req->sync_hdr.SessionId = ses->Suid;
|
|
|
|
rc = build_ntlmssp_auth_blob(&ntlmssp_blob, &blob_length, ses,
|
|
sess_data->nls_cp);
|
|
if (rc) {
|
|
cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n", rc);
|
|
goto out;
|
|
}
|
|
|
|
if (use_spnego) {
|
|
/* BB eventually need to add this */
|
|
cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
|
|
rc = -EOPNOTSUPP;
|
|
goto out;
|
|
}
|
|
sess_data->iov[1].iov_base = ntlmssp_blob;
|
|
sess_data->iov[1].iov_len = blob_length;
|
|
|
|
rc = SMB2_sess_sendreceive(sess_data);
|
|
if (rc)
|
|
goto out;
|
|
|
|
rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
|
|
|
|
/* keep existing ses id and flags if binding */
|
|
if (!ses->binding) {
|
|
ses->Suid = rsp->sync_hdr.SessionId;
|
|
ses->session_flags = le16_to_cpu(rsp->SessionFlags);
|
|
}
|
|
|
|
rc = SMB2_sess_establish_session(sess_data);
|
|
out:
|
|
kfree(ntlmssp_blob);
|
|
SMB2_sess_free_buffer(sess_data);
|
|
kfree(ses->ntlmssp);
|
|
ses->ntlmssp = NULL;
|
|
sess_data->result = rc;
|
|
sess_data->func = NULL;
|
|
}
|
|
|
|
static int
|
|
SMB2_select_sec(struct cifs_ses *ses, struct SMB2_sess_data *sess_data)
|
|
{
|
|
int type;
|
|
|
|
type = smb2_select_sectype(cifs_ses_server(ses), ses->sectype);
|
|
cifs_dbg(FYI, "sess setup type %d\n", type);
|
|
if (type == Unspecified) {
|
|
cifs_dbg(VFS,
|
|
"Unable to select appropriate authentication method!");
|
|
return -EINVAL;
|
|
}
|
|
|
|
switch (type) {
|
|
case Kerberos:
|
|
sess_data->func = SMB2_auth_kerberos;
|
|
break;
|
|
case RawNTLMSSP:
|
|
sess_data->func = SMB2_sess_auth_rawntlmssp_negotiate;
|
|
break;
|
|
default:
|
|
cifs_dbg(VFS, "secType %d not supported!\n", type);
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
|
|
const struct nls_table *nls_cp)
|
|
{
|
|
int rc = 0;
|
|
struct TCP_Server_Info *server = cifs_ses_server(ses);
|
|
struct SMB2_sess_data *sess_data;
|
|
|
|
cifs_dbg(FYI, "Session Setup\n");
|
|
|
|
if (!server) {
|
|
WARN(1, "%s: server is NULL!\n", __func__);
|
|
return -EIO;
|
|
}
|
|
|
|
sess_data = kzalloc(sizeof(struct SMB2_sess_data), GFP_KERNEL);
|
|
if (!sess_data)
|
|
return -ENOMEM;
|
|
|
|
rc = SMB2_select_sec(ses, sess_data);
|
|
if (rc)
|
|
goto out;
|
|
sess_data->xid = xid;
|
|
sess_data->ses = ses;
|
|
sess_data->buf0_type = CIFS_NO_BUFFER;
|
|
sess_data->nls_cp = (struct nls_table *) nls_cp;
|
|
sess_data->previous_session = ses->Suid;
|
|
|
|
/*
|
|
* Initialize the session hash with the server one.
|
|
*/
|
|
memcpy(ses->preauth_sha_hash, server->preauth_sha_hash,
|
|
SMB2_PREAUTH_HASH_SIZE);
|
|
|
|
while (sess_data->func)
|
|
sess_data->func(sess_data);
|
|
|
|
if ((ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST) && (ses->sign))
|
|
cifs_server_dbg(VFS, "signing requested but authenticated as guest\n");
|
|
rc = sess_data->result;
|
|
out:
|
|
kfree(sess_data);
|
|
return rc;
|
|
}
|
|
|
|
int
|
|
SMB2_logoff(const unsigned int xid, struct cifs_ses *ses)
|
|
{
|
|
struct smb_rqst rqst;
|
|
struct smb2_logoff_req *req; /* response is also trivial struct */
|
|
int rc = 0;
|
|
struct TCP_Server_Info *server;
|
|
int flags = 0;
|
|
unsigned int total_len;
|
|
struct kvec iov[1];
|
|
struct kvec rsp_iov;
|
|
int resp_buf_type;
|
|
|
|
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 = smb2_plain_req_init(SMB2_LOGOFF, NULL, (void **) &req, &total_len);
|
|
if (rc)
|
|
return rc;
|
|
|
|
/* since no tcon, smb2_init can not do this, so do here */
|
|
req->sync_hdr.SessionId = ses->Suid;
|
|
|
|
if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
|
|
flags |= CIFS_TRANSFORM_REQ;
|
|
else if (server->sign)
|
|
req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
|
|
|
|
flags |= CIFS_NO_RSP_BUF;
|
|
|
|
iov[0].iov_base = (char *)req;
|
|
iov[0].iov_len = total_len;
|
|
|
|
memset(&rqst, 0, sizeof(struct smb_rqst));
|
|
rqst.rq_iov = iov;
|
|
rqst.rq_nvec = 1;
|
|
|
|
rc = cifs_send_recv(xid, ses, &rqst, &resp_buf_type, flags, &rsp_iov);
|
|
cifs_small_buf_release(req);
|
|
/*
|
|
* 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 smb_rqst rqst;
|
|
struct smb2_tree_connect_req *req;
|
|
struct smb2_tree_connect_rsp *rsp = NULL;
|
|
struct kvec iov[2];
|
|
struct kvec rsp_iov = { NULL, 0 };
|
|
int rc = 0;
|
|
int resp_buftype;
|
|
int unc_path_len;
|
|
__le16 *unc_path = NULL;
|
|
int flags = 0;
|
|
unsigned int total_len;
|
|
struct TCP_Server_Info *server = ses->server;
|
|
|
|
cifs_dbg(FYI, "TCON\n");
|
|
|
|
if (!server || !tree)
|
|
return -EIO;
|
|
|
|
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;
|
|
}
|
|
|
|
/* SMB2 TREE_CONNECT request must be called with TreeId == 0 */
|
|
tcon->tid = 0;
|
|
atomic_set(&tcon->num_remote_opens, 0);
|
|
rc = smb2_plain_req_init(SMB2_TREE_CONNECT, tcon, (void **) &req,
|
|
&total_len);
|
|
if (rc) {
|
|
kfree(unc_path);
|
|
return rc;
|
|
}
|
|
|
|
if (smb3_encryption_required(tcon))
|
|
flags |= CIFS_TRANSFORM_REQ;
|
|
|
|
iov[0].iov_base = (char *)req;
|
|
/* 1 for pad */
|
|
iov[0].iov_len = total_len - 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 */);
|
|
req->PathLength = cpu_to_le16(unc_path_len - 2);
|
|
iov[1].iov_base = unc_path;
|
|
iov[1].iov_len = unc_path_len;
|
|
|
|
/*
|
|
* 3.11 tcon req must be signed if not encrypted. See MS-SMB2 3.2.4.1.1
|
|
* unless it is guest or anonymous user. See MS-SMB2 3.2.5.3.1
|
|
* (Samba servers don't always set the flag so also check if null user)
|
|
*/
|
|
if ((server->dialect == SMB311_PROT_ID) &&
|
|
!smb3_encryption_required(tcon) &&
|
|
!(ses->session_flags &
|
|
(SMB2_SESSION_FLAG_IS_GUEST|SMB2_SESSION_FLAG_IS_NULL)) &&
|
|
((ses->user_name != NULL) || (ses->sectype == Kerberos)))
|
|
req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
|
|
|
|
memset(&rqst, 0, sizeof(struct smb_rqst));
|
|
rqst.rq_iov = iov;
|
|
rqst.rq_nvec = 2;
|
|
|
|
/* Need 64 for max size write so ask for more in case not there yet */
|
|
req->sync_hdr.CreditRequest = cpu_to_le16(64);
|
|
|
|
rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
|
|
cifs_small_buf_release(req);
|
|
rsp = (struct smb2_tree_connect_rsp *)rsp_iov.iov_base;
|
|
trace_smb3_tcon(xid, tcon->tid, ses->Suid, tree, rc);
|
|
if (rc != 0) {
|
|
if (tcon) {
|
|
cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE);
|
|
tcon->need_reconnect = true;
|
|
}
|
|
goto tcon_error_exit;
|
|
}
|
|
|
|
switch (rsp->ShareType) {
|
|
case SMB2_SHARE_TYPE_DISK:
|
|
cifs_dbg(FYI, "connection to disk share\n");
|
|
break;
|
|
case SMB2_SHARE_TYPE_PIPE:
|
|
tcon->pipe = true;
|
|
cifs_dbg(FYI, "connection to pipe share\n");
|
|
break;
|
|
case SMB2_SHARE_TYPE_PRINT:
|
|
tcon->print = true;
|
|
cifs_dbg(FYI, "connection to printer\n");
|
|
break;
|
|
default:
|
|
cifs_server_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->sync_hdr.TreeId;
|
|
strlcpy(tcon->treeName, tree, sizeof(tcon->treeName));
|
|
|
|
if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) &&
|
|
((tcon->share_flags & SHI1005_FLAGS_DFS) == 0))
|
|
cifs_tcon_dbg(VFS, "DFS capability contradicts DFS flag\n");
|
|
|
|
if (tcon->seal &&
|
|
!(server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION))
|
|
cifs_tcon_dbg(VFS, "Encryption is requested but not supported\n");
|
|
|
|
init_copy_chunk_defaults(tcon);
|
|
if (server->ops->validate_negotiate)
|
|
rc = server->ops->validate_negotiate(xid, tcon);
|
|
tcon_exit:
|
|
|
|
free_rsp_buf(resp_buftype, rsp);
|
|
kfree(unc_path);
|
|
return rc;
|
|
|
|
tcon_error_exit:
|
|
if (rsp && rsp->sync_hdr.Status == STATUS_BAD_NETWORK_NAME) {
|
|
cifs_tcon_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree);
|
|
}
|
|
goto tcon_exit;
|
|
}
|
|
|
|
int
|
|
SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon)
|
|
{
|
|
struct smb_rqst rqst;
|
|
struct smb2_tree_disconnect_req *req; /* response is trivial */
|
|
int rc = 0;
|
|
struct cifs_ses *ses = tcon->ses;
|
|
int flags = 0;
|
|
unsigned int total_len;
|
|
struct kvec iov[1];
|
|
struct kvec rsp_iov;
|
|
int resp_buf_type;
|
|
|
|
cifs_dbg(FYI, "Tree Disconnect\n");
|
|
|
|
if (!ses || !(ses->server))
|
|
return -EIO;
|
|
|
|
if ((tcon->need_reconnect) || (tcon->ses->need_reconnect))
|
|
return 0;
|
|
|
|
close_shroot_lease(&tcon->crfid);
|
|
|
|
rc = smb2_plain_req_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req,
|
|
&total_len);
|
|
if (rc)
|
|
return rc;
|
|
|
|
if (smb3_encryption_required(tcon))
|
|
flags |= CIFS_TRANSFORM_REQ;
|
|
|
|
flags |= CIFS_NO_RSP_BUF;
|
|
|
|
iov[0].iov_base = (char *)req;
|
|
iov[0].iov_len = total_len;
|
|
|
|
memset(&rqst, 0, sizeof(struct smb_rqst));
|
|
rqst.rq_iov = iov;
|
|
rqst.rq_nvec = 1;
|
|
|
|
rc = cifs_send_recv(xid, ses, &rqst, &resp_buf_type, flags, &rsp_iov);
|
|
cifs_small_buf_release(req);
|
|
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 void
|
|
parse_query_id_ctxt(struct create_context *cc, struct smb2_file_all_info *buf)
|
|
{
|
|
struct create_on_disk_id *pdisk_id = (struct create_on_disk_id *)cc;
|
|
|
|
cifs_dbg(FYI, "parse query id context 0x%llx 0x%llx\n",
|
|
pdisk_id->DiskFileId, pdisk_id->VolumeId);
|
|
buf->IndexNumber = pdisk_id->DiskFileId;
|
|
}
|
|
|
|
void
|
|
smb2_parse_contexts(struct TCP_Server_Info *server,
|
|
struct smb2_create_rsp *rsp,
|
|
unsigned int *epoch, char *lease_key, __u8 *oplock,
|
|
struct smb2_file_all_info *buf)
|
|
{
|
|
char *data_offset;
|
|
struct create_context *cc;
|
|
unsigned int next;
|
|
unsigned int remaining;
|
|
char *name;
|
|
|
|
*oplock = 0;
|
|
data_offset = (char *)rsp + le32_to_cpu(rsp->CreateContextsOffset);
|
|
remaining = le32_to_cpu(rsp->CreateContextsLength);
|
|
cc = (struct create_context *)data_offset;
|
|
|
|
/* Initialize inode number to 0 in case no valid data in qfid context */
|
|
if (buf)
|
|
buf->IndexNumber = 0;
|
|
|
|
while (remaining >= sizeof(struct create_context)) {
|
|
name = le16_to_cpu(cc->NameOffset) + (char *)cc;
|
|
if (le16_to_cpu(cc->NameLength) == 4 &&
|
|
strncmp(name, SMB2_CREATE_REQUEST_LEASE, 4) == 0)
|
|
*oplock = server->ops->parse_lease_buf(cc, epoch,
|
|
lease_key);
|
|
else if (buf && (le16_to_cpu(cc->NameLength) == 4) &&
|
|
strncmp(name, SMB2_CREATE_QUERY_ON_DISK_ID, 4) == 0)
|
|
parse_query_id_ctxt(cc, buf);
|
|
|
|
next = le32_to_cpu(cc->Next);
|
|
if (!next)
|
|
break;
|
|
remaining -= next;
|
|
cc = (struct create_context *)((char *)cc + next);
|
|
}
|
|
|
|
if (rsp->OplockLevel != SMB2_OPLOCK_LEVEL_LEASE)
|
|
*oplock = rsp->OplockLevel;
|
|
|
|
return;
|
|
}
|
|
|
|
static int
|
|
add_lease_context(struct TCP_Server_Info *server, struct kvec *iov,
|
|
unsigned int *num_iovec, u8 *lease_key, __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(lease_key, *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) +
|
|
iov[num - 1].iov_len);
|
|
le32_add_cpu(&req->CreateContextsLength,
|
|
server->vals->create_lease_size);
|
|
*num_iovec = num + 1;
|
|
return 0;
|
|
}
|
|
|
|
static struct create_durable_v2 *
|
|
create_durable_v2_buf(struct cifs_open_parms *oparms)
|
|
{
|
|
struct cifs_fid *pfid = oparms->fid;
|
|
struct create_durable_v2 *buf;
|
|
|
|
buf = kzalloc(sizeof(struct create_durable_v2), GFP_KERNEL);
|
|
if (!buf)
|
|
return NULL;
|
|
|
|
buf->ccontext.DataOffset = cpu_to_le16(offsetof
|
|
(struct create_durable_v2, dcontext));
|
|
buf->ccontext.DataLength = cpu_to_le32(sizeof(struct durable_context_v2));
|
|
buf->ccontext.NameOffset = cpu_to_le16(offsetof
|
|
(struct create_durable_v2, Name));
|
|
buf->ccontext.NameLength = cpu_to_le16(4);
|
|
|
|
/*
|
|
* NB: Handle timeout defaults to 0, which allows server to choose
|
|
* (most servers default to 120 seconds) and most clients default to 0.
|
|
* This can be overridden at mount ("handletimeout=") if the user wants
|
|
* a different persistent (or resilient) handle timeout for all opens
|
|
* opens on a particular SMB3 mount.
|
|
*/
|
|
buf->dcontext.Timeout = cpu_to_le32(oparms->tcon->handle_timeout);
|
|
buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
|
|
generate_random_uuid(buf->dcontext.CreateGuid);
|
|
memcpy(pfid->create_guid, buf->dcontext.CreateGuid, 16);
|
|
|
|
/* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */
|
|
buf->Name[0] = 'D';
|
|
buf->Name[1] = 'H';
|
|
buf->Name[2] = '2';
|
|
buf->Name[3] = 'Q';
|
|
return buf;
|
|
}
|
|
|
|
static struct create_durable_handle_reconnect_v2 *
|
|
create_reconnect_durable_v2_buf(struct cifs_fid *fid)
|
|
{
|
|
struct create_durable_handle_reconnect_v2 *buf;
|
|
|
|
buf = kzalloc(sizeof(struct create_durable_handle_reconnect_v2),
|
|
GFP_KERNEL);
|
|
if (!buf)
|
|
return NULL;
|
|
|
|
buf->ccontext.DataOffset =
|
|
cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
|
|
dcontext));
|
|
buf->ccontext.DataLength =
|
|
cpu_to_le32(sizeof(struct durable_reconnect_context_v2));
|
|
buf->ccontext.NameOffset =
|
|
cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
|
|
Name));
|
|
buf->ccontext.NameLength = cpu_to_le16(4);
|
|
|
|
buf->dcontext.Fid.PersistentFileId = fid->persistent_fid;
|
|
buf->dcontext.Fid.VolatileFileId = fid->volatile_fid;
|
|
buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
|
|
memcpy(buf->dcontext.CreateGuid, fid->create_guid, 16);
|
|
|
|
/* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */
|
|
buf->Name[0] = 'D';
|
|
buf->Name[1] = 'H';
|
|
buf->Name[2] = '2';
|
|
buf->Name[3] = 'C';
|
|
return buf;
|
|
}
|
|
|
|
static int
|
|
add_durable_v2_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;
|
|
|
|
iov[num].iov_base = create_durable_v2_buf(oparms);
|
|
if (iov[num].iov_base == NULL)
|
|
return -ENOMEM;
|
|
iov[num].iov_len = sizeof(struct create_durable_v2);
|
|
if (!req->CreateContextsOffset)
|
|
req->CreateContextsOffset =
|
|
cpu_to_le32(sizeof(struct smb2_create_req) +
|
|
iov[1].iov_len);
|
|
le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable_v2));
|
|
*num_iovec = num + 1;
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
add_durable_reconnect_v2_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;
|
|
|
|
/* indicate that we don't need to relock the file */
|
|
oparms->reconnect = false;
|
|
|
|
iov[num].iov_base = create_reconnect_durable_v2_buf(oparms->fid);
|
|
if (iov[num].iov_base == NULL)
|
|
return -ENOMEM;
|
|
iov[num].iov_len = sizeof(struct create_durable_handle_reconnect_v2);
|
|
if (!req->CreateContextsOffset)
|
|
req->CreateContextsOffset =
|
|
cpu_to_le32(sizeof(struct smb2_create_req) +
|
|
iov[1].iov_len);
|
|
le32_add_cpu(&req->CreateContextsLength,
|
|
sizeof(struct create_durable_handle_reconnect_v2));
|
|
*num_iovec = num + 1;
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
add_durable_context(struct kvec *iov, unsigned int *num_iovec,
|
|
struct cifs_open_parms *oparms, bool use_persistent)
|
|
{
|
|
struct smb2_create_req *req = iov[0].iov_base;
|
|
unsigned int num = *num_iovec;
|
|
|
|
if (use_persistent) {
|
|
if (oparms->reconnect)
|
|
return add_durable_reconnect_v2_context(iov, num_iovec,
|
|
oparms);
|
|
else
|
|
return add_durable_v2_context(iov, num_iovec, oparms);
|
|
}
|
|
|
|
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) +
|
|
iov[1].iov_len);
|
|
le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable));
|
|
*num_iovec = num + 1;
|
|
return 0;
|
|
}
|
|
|
|
/* See MS-SMB2 2.2.13.2.7 */
|
|
static struct crt_twarp_ctxt *
|
|
create_twarp_buf(__u64 timewarp)
|
|
{
|
|
struct crt_twarp_ctxt *buf;
|
|
|
|
buf = kzalloc(sizeof(struct crt_twarp_ctxt), GFP_KERNEL);
|
|
if (!buf)
|
|
return NULL;
|
|
|
|
buf->ccontext.DataOffset = cpu_to_le16(offsetof
|
|
(struct crt_twarp_ctxt, Timestamp));
|
|
buf->ccontext.DataLength = cpu_to_le32(8);
|
|
buf->ccontext.NameOffset = cpu_to_le16(offsetof
|
|
(struct crt_twarp_ctxt, Name));
|
|
buf->ccontext.NameLength = cpu_to_le16(4);
|
|
/* SMB2_CREATE_TIMEWARP_TOKEN is "TWrp" */
|
|
buf->Name[0] = 'T';
|
|
buf->Name[1] = 'W';
|
|
buf->Name[2] = 'r';
|
|
buf->Name[3] = 'p';
|
|
buf->Timestamp = cpu_to_le64(timewarp);
|
|
return buf;
|
|
}
|
|
|
|
/* See MS-SMB2 2.2.13.2.7 */
|
|
static int
|
|
add_twarp_context(struct kvec *iov, unsigned int *num_iovec, __u64 timewarp)
|
|
{
|
|
struct smb2_create_req *req = iov[0].iov_base;
|
|
unsigned int num = *num_iovec;
|
|
|
|
iov[num].iov_base = create_twarp_buf(timewarp);
|
|
if (iov[num].iov_base == NULL)
|
|
return -ENOMEM;
|
|
iov[num].iov_len = sizeof(struct crt_twarp_ctxt);
|
|
if (!req->CreateContextsOffset)
|
|
req->CreateContextsOffset = cpu_to_le32(
|
|
sizeof(struct smb2_create_req) +
|
|
iov[num - 1].iov_len);
|
|
le32_add_cpu(&req->CreateContextsLength, sizeof(struct crt_twarp_ctxt));
|
|
*num_iovec = num + 1;
|
|
return 0;
|
|
}
|
|
|
|
/* See MS-SMB2 2.2.13.2.2 and MS-DTYP 2.4.6 */
|
|
static struct crt_sd_ctxt *
|
|
create_sd_buf(umode_t mode, unsigned int *len)
|
|
{
|
|
struct crt_sd_ctxt *buf;
|
|
struct cifs_ace *pace;
|
|
unsigned int sdlen, acelen;
|
|
|
|
*len = roundup(sizeof(struct crt_sd_ctxt) + sizeof(struct cifs_ace) * 2,
|
|
8);
|
|
buf = kzalloc(*len, GFP_KERNEL);
|
|
if (buf == NULL)
|
|
return buf;
|
|
|
|
sdlen = sizeof(struct smb3_sd) + sizeof(struct smb3_acl) +
|
|
2 * sizeof(struct cifs_ace);
|
|
|
|
buf->ccontext.DataOffset = cpu_to_le16(offsetof
|
|
(struct crt_sd_ctxt, sd));
|
|
buf->ccontext.DataLength = cpu_to_le32(sdlen);
|
|
buf->ccontext.NameOffset = cpu_to_le16(offsetof
|
|
(struct crt_sd_ctxt, Name));
|
|
buf->ccontext.NameLength = cpu_to_le16(4);
|
|
/* SMB2_CREATE_SD_BUFFER_TOKEN is "SecD" */
|
|
buf->Name[0] = 'S';
|
|
buf->Name[1] = 'e';
|
|
buf->Name[2] = 'c';
|
|
buf->Name[3] = 'D';
|
|
buf->sd.Revision = 1; /* Must be one see MS-DTYP 2.4.6 */
|
|
/*
|
|
* ACL is "self relative" ie ACL is stored in contiguous block of memory
|
|
* and "DP" ie the DACL is present
|
|
*/
|
|
buf->sd.Control = cpu_to_le16(ACL_CONTROL_SR | ACL_CONTROL_DP);
|
|
|
|
/* offset owner, group and Sbz1 and SACL are all zero */
|
|
buf->sd.OffsetDacl = cpu_to_le32(sizeof(struct smb3_sd));
|
|
buf->acl.AclRevision = ACL_REVISION; /* See 2.4.4.1 of MS-DTYP */
|
|
|
|
/* create one ACE to hold the mode embedded in reserved special SID */
|
|
pace = (struct cifs_ace *)(sizeof(struct crt_sd_ctxt) + (char *)buf);
|
|
acelen = setup_special_mode_ACE(pace, (__u64)mode);
|
|
/* and one more ACE to allow access for authenticated users */
|
|
pace = (struct cifs_ace *)(acelen + (sizeof(struct crt_sd_ctxt) +
|
|
(char *)buf));
|
|
acelen += setup_authusers_ACE(pace);
|
|
buf->acl.AclSize = cpu_to_le16(sizeof(struct cifs_acl) + acelen);
|
|
buf->acl.AceCount = cpu_to_le16(2);
|
|
return buf;
|
|
}
|
|
|
|
static int
|
|
add_sd_context(struct kvec *iov, unsigned int *num_iovec, umode_t mode)
|
|
{
|
|
struct smb2_create_req *req = iov[0].iov_base;
|
|
unsigned int num = *num_iovec;
|
|
unsigned int len = 0;
|
|
|
|
iov[num].iov_base = create_sd_buf(mode, &len);
|
|
if (iov[num].iov_base == NULL)
|
|
return -ENOMEM;
|
|
iov[num].iov_len = len;
|
|
if (!req->CreateContextsOffset)
|
|
req->CreateContextsOffset = cpu_to_le32(
|
|
sizeof(struct smb2_create_req) +
|
|
iov[num - 1].iov_len);
|
|
le32_add_cpu(&req->CreateContextsLength, len);
|
|
*num_iovec = num + 1;
|
|
return 0;
|
|
}
|
|
|
|
static struct crt_query_id_ctxt *
|
|
create_query_id_buf(void)
|
|
{
|
|
struct crt_query_id_ctxt *buf;
|
|
|
|
buf = kzalloc(sizeof(struct crt_query_id_ctxt), GFP_KERNEL);
|
|
if (!buf)
|
|
return NULL;
|
|
|
|
buf->ccontext.DataOffset = cpu_to_le16(0);
|
|
buf->ccontext.DataLength = cpu_to_le32(0);
|
|
buf->ccontext.NameOffset = cpu_to_le16(offsetof
|
|
(struct crt_query_id_ctxt, Name));
|
|
buf->ccontext.NameLength = cpu_to_le16(4);
|
|
/* SMB2_CREATE_QUERY_ON_DISK_ID is "QFid" */
|
|
buf->Name[0] = 'Q';
|
|
buf->Name[1] = 'F';
|
|
buf->Name[2] = 'i';
|
|
buf->Name[3] = 'd';
|
|
return buf;
|
|
}
|
|
|
|
/* See MS-SMB2 2.2.13.2.9 */
|
|
static int
|
|
add_query_id_context(struct kvec *iov, unsigned int *num_iovec)
|
|
{
|
|
struct smb2_create_req *req = iov[0].iov_base;
|
|
unsigned int num = *num_iovec;
|
|
|
|
iov[num].iov_base = create_query_id_buf();
|
|
if (iov[num].iov_base == NULL)
|
|
return -ENOMEM;
|
|
iov[num].iov_len = sizeof(struct crt_query_id_ctxt);
|
|
if (!req->CreateContextsOffset)
|
|
req->CreateContextsOffset = cpu_to_le32(
|
|
sizeof(struct smb2_create_req) +
|
|
iov[num - 1].iov_len);
|
|
le32_add_cpu(&req->CreateContextsLength, sizeof(struct crt_query_id_ctxt));
|
|
*num_iovec = num + 1;
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
alloc_path_with_tree_prefix(__le16 **out_path, int *out_size, int *out_len,
|
|
const char *treename, const __le16 *path)
|
|
{
|
|
int treename_len, path_len;
|
|
struct nls_table *cp;
|
|
const __le16 sep[] = {cpu_to_le16('\\'), cpu_to_le16(0x0000)};
|
|
|
|
/*
|
|
* skip leading "\\"
|
|
*/
|
|
treename_len = strlen(treename);
|
|
if (treename_len < 2 || !(treename[0] == '\\' && treename[1] == '\\'))
|
|
return -EINVAL;
|
|
|
|
treename += 2;
|
|
treename_len -= 2;
|
|
|
|
path_len = UniStrnlen((wchar_t *)path, PATH_MAX);
|
|
|
|
/*
|
|
* make room for one path separator between the treename and
|
|
* path
|
|
*/
|
|
*out_len = treename_len + 1 + path_len;
|
|
|
|
/*
|
|
* final path needs to be null-terminated UTF16 with a
|
|
* size aligned to 8
|
|
*/
|
|
|
|
*out_size = roundup((*out_len+1)*2, 8);
|
|
*out_path = kzalloc(*out_size, GFP_KERNEL);
|
|
if (!*out_path)
|
|
return -ENOMEM;
|
|
|
|
cp = load_nls_default();
|
|
cifs_strtoUTF16(*out_path, treename, treename_len, cp);
|
|
UniStrcat(*out_path, sep);
|
|
UniStrcat(*out_path, path);
|
|
unload_nls(cp);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int smb311_posix_mkdir(const unsigned int xid, struct inode *inode,
|
|
umode_t mode, struct cifs_tcon *tcon,
|
|
const char *full_path,
|
|
struct cifs_sb_info *cifs_sb)
|
|
{
|
|
struct smb_rqst rqst;
|
|
struct smb2_create_req *req;
|
|
struct smb2_create_rsp *rsp = NULL;
|
|
struct cifs_ses *ses = tcon->ses;
|
|
struct kvec iov[3]; /* make sure at least one for each open context */
|
|
struct kvec rsp_iov = {NULL, 0};
|
|
int resp_buftype;
|
|
int uni_path_len;
|
|
__le16 *copy_path = NULL;
|
|
int copy_size;
|
|
int rc = 0;
|
|
unsigned int n_iov = 2;
|
|
__u32 file_attributes = 0;
|
|
char *pc_buf = NULL;
|
|
int flags = 0;
|
|
unsigned int total_len;
|
|
__le16 *utf16_path = NULL;
|
|
|
|
cifs_dbg(FYI, "mkdir\n");
|
|
|
|
/* resource #1: path allocation */
|
|
utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
|
|
if (!utf16_path)
|
|
return -ENOMEM;
|
|
|
|
if (!ses || !(ses->server)) {
|
|
rc = -EIO;
|
|
goto err_free_path;
|
|
}
|
|
|
|
/* resource #2: request */
|
|
rc = smb2_plain_req_init(SMB2_CREATE, tcon, (void **) &req, &total_len);
|
|
if (rc)
|
|
goto err_free_path;
|
|
|
|
|
|
if (smb3_encryption_required(tcon))
|
|
flags |= CIFS_TRANSFORM_REQ;
|
|
|
|
req->ImpersonationLevel = IL_IMPERSONATION;
|
|
req->DesiredAccess = cpu_to_le32(FILE_WRITE_ATTRIBUTES);
|
|
/* 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(FILE_CREATE);
|
|
req->CreateOptions = cpu_to_le32(CREATE_NOT_FILE);
|
|
|
|
iov[0].iov_base = (char *)req;
|
|
/* -1 since last byte is buf[0] which is sent below (path) */
|
|
iov[0].iov_len = total_len - 1;
|
|
|
|
req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req));
|
|
|
|
/* [MS-SMB2] 2.2.13 NameOffset:
|
|
* If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
|
|
* the SMB2 header, the file name includes a prefix that will
|
|
* be processed during DFS name normalization as specified in
|
|
* section 3.3.5.9. Otherwise, the file name is relative to
|
|
* the share that is identified by the TreeId in the SMB2
|
|
* header.
|
|
*/
|
|
if (tcon->share_flags & SHI1005_FLAGS_DFS) {
|
|
int name_len;
|
|
|
|
req->sync_hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS;
|
|
rc = alloc_path_with_tree_prefix(©_path, ©_size,
|
|
&name_len,
|
|
tcon->treeName, utf16_path);
|
|
if (rc)
|
|
goto err_free_req;
|
|
|
|
req->NameLength = cpu_to_le16(name_len * 2);
|
|
uni_path_len = copy_size;
|
|
/* free before overwriting resource */
|
|
kfree(utf16_path);
|
|
utf16_path = copy_path;
|
|
} else {
|
|
uni_path_len = (2 * UniStrnlen((wchar_t *)utf16_path, PATH_MAX)) + 2;
|
|
/* MUST set path len (NameLength) to 0 opening root of share */
|
|
req->NameLength = cpu_to_le16(uni_path_len - 2);
|
|
if (uni_path_len % 8 != 0) {
|
|
copy_size = roundup(uni_path_len, 8);
|
|
copy_path = kzalloc(copy_size, GFP_KERNEL);
|
|
if (!copy_path) {
|
|
rc = -ENOMEM;
|
|
goto err_free_req;
|
|
}
|
|
memcpy((char *)copy_path, (const char *)utf16_path,
|
|
uni_path_len);
|
|
uni_path_len = copy_size;
|
|
/* free before overwriting resource */
|
|
kfree(utf16_path);
|
|
utf16_path = copy_path;
|
|
}
|
|
}
|
|
|
|
iov[1].iov_len = uni_path_len;
|
|
iov[1].iov_base = utf16_path;
|
|
req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_NONE;
|
|
|
|
if (tcon->posix_extensions) {
|
|
/* resource #3: posix buf */
|
|
rc = add_posix_context(iov, &n_iov, mode);
|
|
if (rc)
|
|
goto err_free_req;
|
|
pc_buf = iov[n_iov-1].iov_base;
|
|
}
|
|
|
|
|
|
memset(&rqst, 0, sizeof(struct smb_rqst));
|
|
rqst.rq_iov = iov;
|
|
rqst.rq_nvec = n_iov;
|
|
|
|
/* no need to inc num_remote_opens because we close it just below */
|
|
trace_smb3_posix_mkdir_enter(xid, tcon->tid, ses->Suid, CREATE_NOT_FILE,
|
|
FILE_WRITE_ATTRIBUTES);
|
|
/* resource #4: response buffer */
|
|
rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
|
|
if (rc) {
|
|
cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
|
|
trace_smb3_posix_mkdir_err(xid, tcon->tid, ses->Suid,
|
|
CREATE_NOT_FILE,
|
|
FILE_WRITE_ATTRIBUTES, rc);
|
|
goto err_free_rsp_buf;
|
|
}
|
|
|
|
rsp = (struct smb2_create_rsp *)rsp_iov.iov_base;
|
|
trace_smb3_posix_mkdir_done(xid, rsp->PersistentFileId, tcon->tid,
|
|
ses->Suid, CREATE_NOT_FILE,
|
|
FILE_WRITE_ATTRIBUTES);
|
|
|
|
SMB2_close(xid, tcon, rsp->PersistentFileId, rsp->VolatileFileId);
|
|
|
|
/* Eventually save off posix specific response info and timestaps */
|
|
|
|
err_free_rsp_buf:
|
|
free_rsp_buf(resp_buftype, rsp);
|
|
kfree(pc_buf);
|
|
err_free_req:
|
|
cifs_small_buf_release(req);
|
|
err_free_path:
|
|
kfree(utf16_path);
|
|
return rc;
|
|
}
|
|
|
|
int
|
|
SMB2_open_init(struct cifs_tcon *tcon, struct smb_rqst *rqst, __u8 *oplock,
|
|
struct cifs_open_parms *oparms, __le16 *path)
|
|
{
|
|
struct TCP_Server_Info *server = tcon->ses->server;
|
|
struct smb2_create_req *req;
|
|
unsigned int n_iov = 2;
|
|
__u32 file_attributes = 0;
|
|
int copy_size;
|
|
int uni_path_len;
|
|
unsigned int total_len;
|
|
struct kvec *iov = rqst->rq_iov;
|
|
__le16 *copy_path;
|
|
int rc;
|
|
|
|
rc = smb2_plain_req_init(SMB2_CREATE, tcon, (void **) &req, &total_len);
|
|
if (rc)
|
|
return rc;
|
|
|
|
iov[0].iov_base = (char *)req;
|
|
/* -1 since last byte is buf[0] which is sent below (path) */
|
|
iov[0].iov_len = total_len - 1;
|
|
|
|
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);
|
|
req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req));
|
|
|
|
/* [MS-SMB2] 2.2.13 NameOffset:
|
|
* If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
|
|
* the SMB2 header, the file name includes a prefix that will
|
|
* be processed during DFS name normalization as specified in
|
|
* section 3.3.5.9. Otherwise, the file name is relative to
|
|
* the share that is identified by the TreeId in the SMB2
|
|
* header.
|
|
*/
|
|
if (tcon->share_flags & SHI1005_FLAGS_DFS) {
|
|
int name_len;
|
|
|
|
req->sync_hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS;
|
|
rc = alloc_path_with_tree_prefix(©_path, ©_size,
|
|
&name_len,
|
|
tcon->treeName, path);
|
|
if (rc)
|
|
return rc;
|
|
req->NameLength = cpu_to_le16(name_len * 2);
|
|
uni_path_len = copy_size;
|
|
path = copy_path;
|
|
} else {
|
|
uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2;
|
|
/* MUST set path len (NameLength) to 0 opening root of share */
|
|
req->NameLength = cpu_to_le16(uni_path_len - 2);
|
|
copy_size = uni_path_len;
|
|
if (copy_size % 8 != 0)
|
|
copy_size = roundup(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;
|
|
|
|
if ((!server->oplocks) || (tcon->no_lease))
|
|
*oplock = SMB2_OPLOCK_LEVEL_NONE;
|
|
|
|
if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) ||
|
|
*oplock == SMB2_OPLOCK_LEVEL_NONE)
|
|
req->RequestedOplockLevel = *oplock;
|
|
else if (!(server->capabilities & SMB2_GLOBAL_CAP_DIRECTORY_LEASING) &&
|
|
(oparms->create_options & CREATE_NOT_FILE))
|
|
req->RequestedOplockLevel = *oplock; /* no srv lease support */
|
|
else {
|
|
rc = add_lease_context(server, iov, &n_iov,
|
|
oparms->fid->lease_key, oplock);
|
|
if (rc)
|
|
return rc;
|
|
}
|
|
|
|
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[n_iov-1].iov_base;
|
|
ccontext->Next =
|
|
cpu_to_le32(server->vals->create_lease_size);
|
|
}
|
|
|
|
rc = add_durable_context(iov, &n_iov, oparms,
|
|
tcon->use_persistent);
|
|
if (rc)
|
|
return rc;
|
|
}
|
|
|
|
if (tcon->posix_extensions) {
|
|
if (n_iov > 2) {
|
|
struct create_context *ccontext =
|
|
(struct create_context *)iov[n_iov-1].iov_base;
|
|
ccontext->Next =
|
|
cpu_to_le32(iov[n_iov-1].iov_len);
|
|
}
|
|
|
|
rc = add_posix_context(iov, &n_iov, oparms->mode);
|
|
if (rc)
|
|
return rc;
|
|
}
|
|
|
|
if (tcon->snapshot_time) {
|
|
cifs_dbg(FYI, "adding snapshot context\n");
|
|
if (n_iov > 2) {
|
|
struct create_context *ccontext =
|
|
(struct create_context *)iov[n_iov-1].iov_base;
|
|
ccontext->Next =
|
|
cpu_to_le32(iov[n_iov-1].iov_len);
|
|
}
|
|
|
|
rc = add_twarp_context(iov, &n_iov, tcon->snapshot_time);
|
|
if (rc)
|
|
return rc;
|
|
}
|
|
|
|
if ((oparms->disposition != FILE_OPEN) &&
|
|
(oparms->cifs_sb) &&
|
|
(oparms->cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID) &&
|
|
(oparms->mode != ACL_NO_MODE)) {
|
|
if (n_iov > 2) {
|
|
struct create_context *ccontext =
|
|
(struct create_context *)iov[n_iov-1].iov_base;
|
|
ccontext->Next =
|
|
cpu_to_le32(iov[n_iov-1].iov_len);
|
|
}
|
|
|
|
cifs_dbg(FYI, "add sd with mode 0x%x\n", oparms->mode);
|
|
rc = add_sd_context(iov, &n_iov, oparms->mode);
|
|
if (rc)
|
|
return rc;
|
|
}
|
|
|
|
if (n_iov > 2) {
|
|
struct create_context *ccontext =
|
|
(struct create_context *)iov[n_iov-1].iov_base;
|
|
ccontext->Next = cpu_to_le32(iov[n_iov-1].iov_len);
|
|
}
|
|
add_query_id_context(iov, &n_iov);
|
|
|
|
rqst->rq_nvec = n_iov;
|
|
return 0;
|
|
}
|
|
|
|
/* rq_iov[0] is the request and is released by cifs_small_buf_release().
|
|
* All other vectors are freed by kfree().
|
|
*/
|
|
void
|
|
SMB2_open_free(struct smb_rqst *rqst)
|
|
{
|
|
int i;
|
|
|
|
if (rqst && rqst->rq_iov) {
|
|
cifs_small_buf_release(rqst->rq_iov[0].iov_base);
|
|
for (i = 1; i < rqst->rq_nvec; i++)
|
|
if (rqst->rq_iov[i].iov_base != smb2_padding)
|
|
kfree(rqst->rq_iov[i].iov_base);
|
|
}
|
|
}
|
|
|
|
int
|
|
SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
|
|
__u8 *oplock, struct smb2_file_all_info *buf,
|
|
struct kvec *err_iov, int *buftype)
|
|
{
|
|
struct smb_rqst rqst;
|
|
struct smb2_create_rsp *rsp = NULL;
|
|
struct TCP_Server_Info *server;
|
|
struct cifs_tcon *tcon = oparms->tcon;
|
|
struct cifs_ses *ses = tcon->ses;
|
|
struct kvec iov[SMB2_CREATE_IOV_SIZE];
|
|
struct kvec rsp_iov = {NULL, 0};
|
|
int resp_buftype = CIFS_NO_BUFFER;
|
|
int rc = 0;
|
|
int flags = 0;
|
|
|
|
cifs_dbg(FYI, "create/open\n");
|
|
if (ses && (ses->server))
|
|
server = ses->server;
|
|
else
|
|
return -EIO;
|
|
|
|
if (smb3_encryption_required(tcon))
|
|
flags |= CIFS_TRANSFORM_REQ;
|
|
|
|
memset(&rqst, 0, sizeof(struct smb_rqst));
|
|
memset(&iov, 0, sizeof(iov));
|
|
rqst.rq_iov = iov;
|
|
rqst.rq_nvec = SMB2_CREATE_IOV_SIZE;
|
|
|
|
rc = SMB2_open_init(tcon, &rqst, oplock, oparms, path);
|
|
if (rc)
|
|
goto creat_exit;
|
|
|
|
trace_smb3_open_enter(xid, tcon->tid, tcon->ses->Suid,
|
|
oparms->create_options, oparms->desired_access);
|
|
|
|
rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags,
|
|
&rsp_iov);
|
|
rsp = (struct smb2_create_rsp *)rsp_iov.iov_base;
|
|
|
|
if (rc != 0) {
|
|
cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
|
|
if (err_iov && rsp) {
|
|
*err_iov = rsp_iov;
|
|
*buftype = resp_buftype;
|
|
resp_buftype = CIFS_NO_BUFFER;
|
|
rsp = NULL;
|
|
}
|
|
trace_smb3_open_err(xid, tcon->tid, ses->Suid,
|
|
oparms->create_options, oparms->desired_access, rc);
|
|
if (rc == -EREMCHG) {
|
|
printk_once(KERN_WARNING "server share %s deleted\n",
|
|
tcon->treeName);
|
|
tcon->need_reconnect = true;
|
|
}
|
|
goto creat_exit;
|
|
} else
|
|
trace_smb3_open_done(xid, rsp->PersistentFileId, tcon->tid,
|
|
ses->Suid, oparms->create_options,
|
|
oparms->desired_access);
|
|
|
|
atomic_inc(&tcon->num_remote_opens);
|
|
oparms->fid->persistent_fid = rsp->PersistentFileId;
|
|
oparms->fid->volatile_fid = rsp->VolatileFileId;
|
|
#ifdef CONFIG_CIFS_DEBUG2
|
|
oparms->fid->mid = le64_to_cpu(rsp->sync_hdr.MessageId);
|
|
#endif /* CIFS_DEBUG2 */
|
|
|
|
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;
|
|
}
|
|
|
|
|
|
smb2_parse_contexts(server, rsp, &oparms->fid->epoch,
|
|
oparms->fid->lease_key, oplock, buf);
|
|
creat_exit:
|
|
SMB2_open_free(&rqst);
|
|
free_rsp_buf(resp_buftype, rsp);
|
|
return rc;
|
|
}
|
|
|
|
int
|
|
SMB2_ioctl_init(struct cifs_tcon *tcon, struct smb_rqst *rqst,
|
|
u64 persistent_fid, u64 volatile_fid, u32 opcode,
|
|
bool is_fsctl, char *in_data, u32 indatalen,
|
|
__u32 max_response_size)
|
|
{
|
|
struct smb2_ioctl_req *req;
|
|
struct kvec *iov = rqst->rq_iov;
|
|
unsigned int total_len;
|
|
int rc;
|
|
char *in_data_buf;
|
|
|
|
rc = smb2_ioctl_req_init(opcode, tcon, (void **) &req, &total_len);
|
|
if (rc)
|
|
return rc;
|
|
|
|
if (indatalen) {
|
|
/*
|
|
* indatalen is usually small at a couple of bytes max, so
|
|
* just allocate through generic pool
|
|
*/
|
|
in_data_buf = kmemdup(in_data, indatalen, GFP_NOFS);
|
|
if (!in_data_buf) {
|
|
cifs_small_buf_release(req);
|
|
return -ENOMEM;
|
|
}
|
|
}
|
|
|
|
req->CtlCode = cpu_to_le32(opcode);
|
|
req->PersistentFileId = persistent_fid;
|
|
req->VolatileFileId = volatile_fid;
|
|
|
|
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]).
|
|
*/
|
|
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));
|
|
rqst->rq_nvec = 2;
|
|
iov[0].iov_len = total_len - 1;
|
|
iov[1].iov_base = in_data_buf;
|
|
iov[1].iov_len = indatalen;
|
|
} else {
|
|
rqst->rq_nvec = 1;
|
|
iov[0].iov_len = total_len;
|
|
}
|
|
|
|
req->OutputOffset = 0;
|
|
req->OutputCount = 0; /* MBZ */
|
|
|
|
/*
|
|
* In most cases max_response_size is set to 16K (CIFSMaxBufSize)
|
|
* We Could increase default MaxOutputResponse, but that could require
|
|
* more credits. 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
|
|
* We can not handle more than CIFS_MAX_BUF_SIZE yet but may want
|
|
* to increase this limit up in the future.
|
|
* Note that for snapshot queries that servers like Azure expect that
|
|
* the first query be minimal size (and just used to get the number/size
|
|
* of previous versions) so response size must be specified as EXACTLY
|
|
* sizeof(struct snapshot_array) which is 16 when rounded up to multiple
|
|
* of eight bytes. Currently that is the only case where we set max
|
|
* response size smaller.
|
|
*/
|
|
req->MaxOutputResponse = cpu_to_le32(max_response_size);
|
|
|
|
if (is_fsctl)
|
|
req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL);
|
|
else
|
|
req->Flags = 0;
|
|
|
|
/* validate negotiate request must be signed - see MS-SMB2 3.2.5.5 */
|
|
if (opcode == FSCTL_VALIDATE_NEGOTIATE_INFO)
|
|
req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
SMB2_ioctl_free(struct smb_rqst *rqst)
|
|
{
|
|
int i;
|
|
if (rqst && rqst->rq_iov) {
|
|
cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */
|
|
for (i = 1; i < rqst->rq_nvec; i++)
|
|
if (rqst->rq_iov[i].iov_base != smb2_padding)
|
|
kfree(rqst->rq_iov[i].iov_base);
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* 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, u32 max_out_data_len,
|
|
char **out_data, u32 *plen /* returned data len */)
|
|
{
|
|
struct smb_rqst rqst;
|
|
struct smb2_ioctl_rsp *rsp = NULL;
|
|
struct cifs_ses *ses;
|
|
struct kvec iov[SMB2_IOCTL_IOV_SIZE];
|
|
struct kvec rsp_iov = {NULL, 0};
|
|
int resp_buftype = CIFS_NO_BUFFER;
|
|
int rc = 0;
|
|
int flags = 0;
|
|
struct TCP_Server_Info *server;
|
|
|
|
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)
|
|
return -EIO;
|
|
server = ses->server;
|
|
if (!server)
|
|
return -EIO;
|
|
|
|
if (smb3_encryption_required(tcon))
|
|
flags |= CIFS_TRANSFORM_REQ;
|
|
|
|
memset(&rqst, 0, sizeof(struct smb_rqst));
|
|
memset(&iov, 0, sizeof(iov));
|
|
rqst.rq_iov = iov;
|
|
rqst.rq_nvec = SMB2_IOCTL_IOV_SIZE;
|
|
|
|
rc = SMB2_ioctl_init(tcon, &rqst, persistent_fid, volatile_fid, opcode,
|
|
is_fsctl, in_data, indatalen, max_out_data_len);
|
|
if (rc)
|
|
goto ioctl_exit;
|
|
|
|
rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags,
|
|
&rsp_iov);
|
|
rsp = (struct smb2_ioctl_rsp *)rsp_iov.iov_base;
|
|
|
|
if (rc != 0)
|
|
trace_smb3_fsctl_err(xid, persistent_fid, tcon->tid,
|
|
ses->Suid, 0, opcode, rc);
|
|
|
|
if ((rc != 0) && (rc != -EINVAL) && (rc != -E2BIG)) {
|
|
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;
|
|
}
|
|
} else if (rc == -E2BIG) {
|
|
if (opcode != FSCTL_QUERY_ALLOCATED_RANGES) {
|
|
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 > rsp_iov.iov_len || *plen > 0xFF00) {
|
|
cifs_tcon_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen);
|
|
*plen = 0;
|
|
rc = -EIO;
|
|
goto ioctl_exit;
|
|
}
|
|
|
|
if (rsp_iov.iov_len - *plen < le32_to_cpu(rsp->OutputOffset)) {
|
|
cifs_tcon_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 = kmemdup((char *)rsp + le32_to_cpu(rsp->OutputOffset),
|
|
*plen, GFP_KERNEL);
|
|
if (*out_data == NULL) {
|
|
rc = -ENOMEM;
|
|
goto ioctl_exit;
|
|
}
|
|
|
|
ioctl_exit:
|
|
SMB2_ioctl_free(&rqst);
|
|
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 */, CIFSMaxBufSize /* max out data */,
|
|
&ret_data /* out data */, NULL);
|
|
|
|
cifs_dbg(FYI, "set compression rc %d\n", rc);
|
|
|
|
return rc;
|
|
}
|
|
|
|
int
|
|
SMB2_close_init(struct cifs_tcon *tcon, struct smb_rqst *rqst,
|
|
u64 persistent_fid, u64 volatile_fid, bool query_attrs)
|
|
{
|
|
struct smb2_close_req *req;
|
|
struct kvec *iov = rqst->rq_iov;
|
|
unsigned int total_len;
|
|
int rc;
|
|
|
|
rc = smb2_plain_req_init(SMB2_CLOSE, tcon, (void **) &req, &total_len);
|
|
if (rc)
|
|
return rc;
|
|
|
|
req->PersistentFileId = persistent_fid;
|
|
req->VolatileFileId = volatile_fid;
|
|
if (query_attrs)
|
|
req->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB;
|
|
else
|
|
req->Flags = 0;
|
|
iov[0].iov_base = (char *)req;
|
|
iov[0].iov_len = total_len;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
SMB2_close_free(struct smb_rqst *rqst)
|
|
{
|
|
if (rqst && rqst->rq_iov)
|
|
cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */
|
|
}
|
|
|
|
int
|
|
__SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
|
|
u64 persistent_fid, u64 volatile_fid,
|
|
struct smb2_file_network_open_info *pbuf)
|
|
{
|
|
struct smb_rqst rqst;
|
|
struct smb2_close_rsp *rsp = NULL;
|
|
struct cifs_ses *ses = tcon->ses;
|
|
struct kvec iov[1];
|
|
struct kvec rsp_iov;
|
|
int resp_buftype = CIFS_NO_BUFFER;
|
|
int rc = 0;
|
|
int flags = 0;
|
|
bool query_attrs = false;
|
|
|
|
cifs_dbg(FYI, "Close\n");
|
|
|
|
if (!ses || !(ses->server))
|
|
return -EIO;
|
|
|
|
if (smb3_encryption_required(tcon))
|
|
flags |= CIFS_TRANSFORM_REQ;
|
|
|
|
memset(&rqst, 0, sizeof(struct smb_rqst));
|
|
memset(&iov, 0, sizeof(iov));
|
|
rqst.rq_iov = iov;
|
|
rqst.rq_nvec = 1;
|
|
|
|
/* check if need to ask server to return timestamps in close response */
|
|
if (pbuf)
|
|
query_attrs = true;
|
|
|
|
trace_smb3_close_enter(xid, persistent_fid, tcon->tid, ses->Suid);
|
|
rc = SMB2_close_init(tcon, &rqst, persistent_fid, volatile_fid,
|
|
query_attrs);
|
|
if (rc)
|
|
goto close_exit;
|
|
|
|
rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
|
|
rsp = (struct smb2_close_rsp *)rsp_iov.iov_base;
|
|
|
|
if (rc != 0) {
|
|
cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE);
|
|
trace_smb3_close_err(xid, persistent_fid, tcon->tid, ses->Suid,
|
|
rc);
|
|
goto close_exit;
|
|
} else {
|
|
trace_smb3_close_done(xid, persistent_fid, tcon->tid,
|
|
ses->Suid);
|
|
/*
|
|
* Note that have to subtract 4 since struct network_open_info
|
|
* has a final 4 byte pad that close response does not have
|
|
*/
|
|
if (pbuf)
|
|
memcpy(pbuf, (char *)&rsp->CreationTime, sizeof(*pbuf) - 4);
|
|
}
|
|
|
|
atomic_dec(&tcon->num_remote_opens);
|
|
close_exit:
|
|
SMB2_close_free(&rqst);
|
|
free_rsp_buf(resp_buftype, rsp);
|
|
|
|
/* retry close in a worker thread if this one is interrupted */
|
|
if (rc == -EINTR) {
|
|
int tmp_rc;
|
|
|
|
tmp_rc = smb2_handle_cancelled_close(tcon, persistent_fid,
|
|
volatile_fid);
|
|
if (tmp_rc)
|
|
cifs_dbg(VFS, "handle cancelled close fid 0x%llx returned error %d\n",
|
|
persistent_fid, tmp_rc);
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
int
|
|
SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
|
|
u64 persistent_fid, u64 volatile_fid)
|
|
{
|
|
return __SMB2_close(xid, tcon, persistent_fid, volatile_fid, NULL);
|
|
}
|
|
|
|
int
|
|
smb2_validate_iov(unsigned int offset, unsigned int buffer_length,
|
|
struct kvec *iov, unsigned int min_buf_size)
|
|
{
|
|
unsigned int smb_len = iov->iov_len;
|
|
char *end_of_smb = smb_len + (char *)iov->iov_base;
|
|
char *begin_of_buf = offset + (char *)iov->iov_base;
|
|
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.
|
|
*/
|
|
int
|
|
smb2_validate_and_copy_iov(unsigned int offset, unsigned int buffer_length,
|
|
struct kvec *iov, unsigned int minbufsize,
|
|
char *data)
|
|
{
|
|
char *begin_of_buf = offset + (char *)iov->iov_base;
|
|
int rc;
|
|
|
|
if (!data)
|
|
return -EINVAL;
|
|
|
|
rc = smb2_validate_iov(offset, buffer_length, iov, minbufsize);
|
|
if (rc)
|
|
return rc;
|
|
|
|
memcpy(data, begin_of_buf, buffer_length);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
SMB2_query_info_init(struct cifs_tcon *tcon, struct smb_rqst *rqst,
|
|
u64 persistent_fid, u64 volatile_fid,
|
|
u8 info_class, u8 info_type, u32 additional_info,
|
|
size_t output_len, size_t input_len, void *input)
|
|
{
|
|
struct smb2_query_info_req *req;
|
|
struct kvec *iov = rqst->rq_iov;
|
|
unsigned int total_len;
|
|
int rc;
|
|
|
|
rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, (void **) &req,
|
|
&total_len);
|
|
if (rc)
|
|
return rc;
|
|
|
|
req->InfoType = info_type;
|
|
req->FileInfoClass = info_class;
|
|
req->PersistentFileId = persistent_fid;
|
|
req->VolatileFileId = volatile_fid;
|
|
req->AdditionalInformation = cpu_to_le32(additional_info);
|
|
|
|
req->OutputBufferLength = cpu_to_le32(output_len);
|
|
if (input_len) {
|
|
req->InputBufferLength = cpu_to_le32(input_len);
|
|
/* total_len for smb query request never close to le16 max */
|
|
req->InputBufferOffset = cpu_to_le16(total_len - 1);
|
|
memcpy(req->Buffer, input, input_len);
|
|
}
|
|
|
|
iov[0].iov_base = (char *)req;
|
|
/* 1 for Buffer */
|
|
iov[0].iov_len = total_len - 1 + input_len;
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
SMB2_query_info_free(struct smb_rqst *rqst)
|
|
{
|
|
if (rqst && rqst->rq_iov)
|
|
cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */
|
|
}
|
|
|
|
static int
|
|
query_info(const unsigned int xid, struct cifs_tcon *tcon,
|
|
u64 persistent_fid, u64 volatile_fid, u8 info_class, u8 info_type,
|
|
u32 additional_info, size_t output_len, size_t min_len, void **data,
|
|
u32 *dlen)
|
|
{
|
|
struct smb_rqst rqst;
|
|
struct smb2_query_info_rsp *rsp = NULL;
|
|
struct kvec iov[1];
|
|
struct kvec rsp_iov;
|
|
int rc = 0;
|
|
int resp_buftype = CIFS_NO_BUFFER;
|
|
struct cifs_ses *ses = tcon->ses;
|
|
struct TCP_Server_Info *server;
|
|
int flags = 0;
|
|
bool allocated = false;
|
|
|
|
cifs_dbg(FYI, "Query Info\n");
|
|
|
|
if (!ses)
|
|
return -EIO;
|
|
server = ses->server;
|
|
if (!server)
|
|
return -EIO;
|
|
|
|
if (smb3_encryption_required(tcon))
|
|
flags |= CIFS_TRANSFORM_REQ;
|
|
|
|
memset(&rqst, 0, sizeof(struct smb_rqst));
|
|
memset(&iov, 0, sizeof(iov));
|
|
rqst.rq_iov = iov;
|
|
rqst.rq_nvec = 1;
|
|
|
|
rc = SMB2_query_info_init(tcon, &rqst, persistent_fid, volatile_fid,
|
|
info_class, info_type, additional_info,
|
|
output_len, 0, NULL);
|
|
if (rc)
|
|
goto qinf_exit;
|
|
|
|
trace_smb3_query_info_enter(xid, persistent_fid, tcon->tid,
|
|
ses->Suid, info_class, (__u32)info_type);
|
|
|
|
rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
|
|
rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
|
|
|
|
if (rc) {
|
|
cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
|
|
trace_smb3_query_info_err(xid, persistent_fid, tcon->tid,
|
|
ses->Suid, info_class, (__u32)info_type, rc);
|
|
goto qinf_exit;
|
|
}
|
|
|
|
trace_smb3_query_info_done(xid, persistent_fid, tcon->tid,
|
|
ses->Suid, info_class, (__u32)info_type);
|
|
|
|
if (dlen) {
|
|
*dlen = le32_to_cpu(rsp->OutputBufferLength);
|
|
if (!*data) {
|
|
*data = kmalloc(*dlen, GFP_KERNEL);
|
|
if (!*data) {
|
|
cifs_tcon_dbg(VFS,
|
|
"Error %d allocating memory for acl\n",
|
|
rc);
|
|
*dlen = 0;
|
|
rc = -ENOMEM;
|
|
goto qinf_exit;
|
|
}
|
|
allocated = true;
|
|
}
|
|
}
|
|
|
|
rc = smb2_validate_and_copy_iov(le16_to_cpu(rsp->OutputBufferOffset),
|
|
le32_to_cpu(rsp->OutputBufferLength),
|
|
&rsp_iov, min_len, *data);
|
|
if (rc && allocated) {
|
|
kfree(*data);
|
|
*data = NULL;
|
|
*dlen = 0;
|
|
}
|
|
|
|
qinf_exit:
|
|
SMB2_query_info_free(&rqst);
|
|
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, SMB2_O_INFO_FILE, 0,
|
|
sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
|
|
sizeof(struct smb2_file_all_info), (void **)&data,
|
|
NULL);
|
|
}
|
|
|
|
int
|
|
SMB2_query_acl(const unsigned int xid, struct cifs_tcon *tcon,
|
|
u64 persistent_fid, u64 volatile_fid,
|
|
void **data, u32 *plen)
|
|
{
|
|
__u32 additional_info = OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO;
|
|
*plen = 0;
|
|
|
|
return query_info(xid, tcon, persistent_fid, volatile_fid,
|
|
0, SMB2_O_INFO_SECURITY, additional_info,
|
|
SMB2_MAX_BUFFER_SIZE, MIN_SEC_DESC_LEN, data, plen);
|
|
}
|
|
|
|
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, SMB2_O_INFO_FILE, 0,
|
|
sizeof(struct smb2_file_internal_info),
|
|
sizeof(struct smb2_file_internal_info),
|
|
(void **)&uniqueid, NULL);
|
|
}
|
|
|
|
/*
|
|
* CHANGE_NOTIFY Request is sent to get notifications on changes to a directory
|
|
* See MS-SMB2 2.2.35 and 2.2.36
|
|
*/
|
|
|
|
static int
|
|
SMB2_notify_init(const unsigned int xid, struct smb_rqst *rqst,
|
|
struct cifs_tcon *tcon, u64 persistent_fid, u64 volatile_fid,
|
|
u32 completion_filter, bool watch_tree)
|
|
{
|
|
struct smb2_change_notify_req *req;
|
|
struct kvec *iov = rqst->rq_iov;
|
|
unsigned int total_len;
|
|
int rc;
|
|
|
|
rc = smb2_plain_req_init(SMB2_CHANGE_NOTIFY, tcon, (void **) &req, &total_len);
|
|
if (rc)
|
|
return rc;
|
|
|
|
req->PersistentFileId = persistent_fid;
|
|
req->VolatileFileId = volatile_fid;
|
|
req->OutputBufferLength =
|
|
cpu_to_le32(SMB2_MAX_BUFFER_SIZE - MAX_SMB2_HDR_SIZE);
|
|
req->CompletionFilter = cpu_to_le32(completion_filter);
|
|
if (watch_tree)
|
|
req->Flags = cpu_to_le16(SMB2_WATCH_TREE);
|
|
else
|
|
req->Flags = 0;
|
|
|
|
iov[0].iov_base = (char *)req;
|
|
iov[0].iov_len = total_len;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
SMB2_change_notify(const unsigned int xid, struct cifs_tcon *tcon,
|
|
u64 persistent_fid, u64 volatile_fid, bool watch_tree,
|
|
u32 completion_filter)
|
|
{
|
|
struct cifs_ses *ses = tcon->ses;
|
|
struct smb_rqst rqst;
|
|
struct kvec iov[1];
|
|
struct kvec rsp_iov = {NULL, 0};
|
|
int resp_buftype = CIFS_NO_BUFFER;
|
|
int flags = 0;
|
|
int rc = 0;
|
|
|
|
cifs_dbg(FYI, "change notify\n");
|
|
if (!ses || !(ses->server))
|
|
return -EIO;
|
|
|
|
if (smb3_encryption_required(tcon))
|
|
flags |= CIFS_TRANSFORM_REQ;
|
|
|
|
memset(&rqst, 0, sizeof(struct smb_rqst));
|
|
memset(&iov, 0, sizeof(iov));
|
|
rqst.rq_iov = iov;
|
|
rqst.rq_nvec = 1;
|
|
|
|
rc = SMB2_notify_init(xid, &rqst, tcon, persistent_fid, volatile_fid,
|
|
completion_filter, watch_tree);
|
|
if (rc)
|
|
goto cnotify_exit;
|
|
|
|
trace_smb3_notify_enter(xid, persistent_fid, tcon->tid, ses->Suid,
|
|
(u8)watch_tree, completion_filter);
|
|
rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
|
|
|
|
if (rc != 0) {
|
|
cifs_stats_fail_inc(tcon, SMB2_CHANGE_NOTIFY_HE);
|
|
trace_smb3_notify_err(xid, persistent_fid, tcon->tid, ses->Suid,
|
|
(u8)watch_tree, completion_filter, rc);
|
|
} else
|
|
trace_smb3_notify_done(xid, persistent_fid, tcon->tid,
|
|
ses->Suid, (u8)watch_tree, completion_filter);
|
|
|
|
cnotify_exit:
|
|
if (rqst.rq_iov)
|
|
cifs_small_buf_release(rqst.rq_iov[0].iov_base); /* request */
|
|
free_rsp_buf(resp_buftype, rsp_iov.iov_base);
|
|
return rc;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* 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 *rsp = (struct smb2_echo_rsp *)mid->resp_buf;
|
|
struct cifs_credits credits = { .value = 0, .instance = 0 };
|
|
|
|
if (mid->mid_state == MID_RESPONSE_RECEIVED
|
|
|| mid->mid_state == MID_RESPONSE_MALFORMED) {
|
|
credits.value = le16_to_cpu(rsp->sync_hdr.CreditRequest);
|
|
credits.instance = server->reconnect_instance;
|
|
}
|
|
|
|
DeleteMidQEntry(mid);
|
|
add_credits(server, &credits, CIFS_ECHO_OP);
|
|
}
|
|
|
|
void smb2_reconnect_server(struct work_struct *work)
|
|
{
|
|
struct TCP_Server_Info *server = container_of(work,
|
|
struct TCP_Server_Info, reconnect.work);
|
|
struct cifs_ses *ses;
|
|
struct cifs_tcon *tcon, *tcon2;
|
|
struct list_head tmp_list;
|
|
int tcon_exist = false;
|
|
int rc;
|
|
int resched = false;
|
|
|
|
|
|
/* Prevent simultaneous reconnects that can corrupt tcon->rlist list */
|
|
mutex_lock(&server->reconnect_mutex);
|
|
|
|
INIT_LIST_HEAD(&tmp_list);
|
|
cifs_dbg(FYI, "Need negotiate, reconnecting tcons\n");
|
|
|
|
spin_lock(&cifs_tcp_ses_lock);
|
|
list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
|
|
list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
|
|
if (tcon->need_reconnect || tcon->need_reopen_files) {
|
|
tcon->tc_count++;
|
|
list_add_tail(&tcon->rlist, &tmp_list);
|
|
tcon_exist = true;
|
|
}
|
|
}
|
|
/*
|
|
* IPC has the same lifetime as its session and uses its
|
|
* refcount.
|
|
*/
|
|
if (ses->tcon_ipc && ses->tcon_ipc->need_reconnect) {
|
|
list_add_tail(&ses->tcon_ipc->rlist, &tmp_list);
|
|
tcon_exist = true;
|
|
ses->ses_count++;
|
|
}
|
|
}
|
|
/*
|
|
* Get the reference to server struct to be sure that the last call of
|
|
* cifs_put_tcon() in the loop below won't release the server pointer.
|
|
*/
|
|
if (tcon_exist)
|
|
server->srv_count++;
|
|
|
|
spin_unlock(&cifs_tcp_ses_lock);
|
|
|
|
list_for_each_entry_safe(tcon, tcon2, &tmp_list, rlist) {
|
|
rc = smb2_reconnect(SMB2_INTERNAL_CMD, tcon);
|
|
if (!rc)
|
|
cifs_reopen_persistent_handles(tcon);
|
|
else
|
|
resched = true;
|
|
list_del_init(&tcon->rlist);
|
|
if (tcon->ipc)
|
|
cifs_put_smb_ses(tcon->ses);
|
|
else
|
|
cifs_put_tcon(tcon);
|
|
}
|
|
|
|
cifs_dbg(FYI, "Reconnecting tcons finished\n");
|
|
if (resched)
|
|
queue_delayed_work(cifsiod_wq, &server->reconnect, 2 * HZ);
|
|
mutex_unlock(&server->reconnect_mutex);
|
|
|
|
/* now we can safely release srv struct */
|
|
if (tcon_exist)
|
|
cifs_put_tcp_session(server, 1);
|
|
}
|
|
|
|
int
|
|
SMB2_echo(struct TCP_Server_Info *server)
|
|
{
|
|
struct smb2_echo_req *req;
|
|
int rc = 0;
|
|
struct kvec iov[1];
|
|
struct smb_rqst rqst = { .rq_iov = iov,
|
|
.rq_nvec = 1 };
|
|
unsigned int total_len;
|
|
|
|
cifs_dbg(FYI, "In echo request\n");
|
|
|
|
if (server->tcpStatus == CifsNeedNegotiate) {
|
|
/* No need to send echo on newly established connections */
|
|
queue_delayed_work(cifsiod_wq, &server->reconnect, 0);
|
|
return rc;
|
|
}
|
|
|
|
rc = smb2_plain_req_init(SMB2_ECHO, NULL, (void **)&req, &total_len);
|
|
if (rc)
|
|
return rc;
|
|
|
|
req->sync_hdr.CreditRequest = cpu_to_le16(1);
|
|
|
|
iov[0].iov_len = total_len;
|
|
iov[0].iov_base = (char *)req;
|
|
|
|
rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, NULL,
|
|
server, CIFS_ECHO_OP, NULL);
|
|
if (rc)
|
|
cifs_dbg(FYI, "Echo request failed: %d\n", rc);
|
|
|
|
cifs_small_buf_release(req);
|
|
return rc;
|
|
}
|
|
|
|
void
|
|
SMB2_flush_free(struct smb_rqst *rqst)
|
|
{
|
|
if (rqst && rqst->rq_iov)
|
|
cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */
|
|
}
|
|
|
|
int
|
|
SMB2_flush_init(const unsigned int xid, struct smb_rqst *rqst,
|
|
struct cifs_tcon *tcon, u64 persistent_fid, u64 volatile_fid)
|
|
{
|
|
struct smb2_flush_req *req;
|
|
struct kvec *iov = rqst->rq_iov;
|
|
unsigned int total_len;
|
|
int rc;
|
|
|
|
rc = smb2_plain_req_init(SMB2_FLUSH, tcon, (void **) &req, &total_len);
|
|
if (rc)
|
|
return rc;
|
|
|
|
req->PersistentFileId = persistent_fid;
|
|
req->VolatileFileId = volatile_fid;
|
|
|
|
iov[0].iov_base = (char *)req;
|
|
iov[0].iov_len = total_len;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
|
|
u64 volatile_fid)
|
|
{
|
|
struct cifs_ses *ses = tcon->ses;
|
|
struct smb_rqst rqst;
|
|
struct kvec iov[1];
|
|
struct kvec rsp_iov = {NULL, 0};
|
|
int resp_buftype = CIFS_NO_BUFFER;
|
|
int flags = 0;
|
|
int rc = 0;
|
|
|
|
cifs_dbg(FYI, "flush\n");
|
|
if (!ses || !(ses->server))
|
|
return -EIO;
|
|
|
|
if (smb3_encryption_required(tcon))
|
|
flags |= CIFS_TRANSFORM_REQ;
|
|
|
|
memset(&rqst, 0, sizeof(struct smb_rqst));
|
|
memset(&iov, 0, sizeof(iov));
|
|
rqst.rq_iov = iov;
|
|
rqst.rq_nvec = 1;
|
|
|
|
rc = SMB2_flush_init(xid, &rqst, tcon, persistent_fid, volatile_fid);
|
|
if (rc)
|
|
goto flush_exit;
|
|
|
|
trace_smb3_flush_enter(xid, persistent_fid, tcon->tid, ses->Suid);
|
|
rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
|
|
|
|
if (rc != 0) {
|
|
cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE);
|
|
trace_smb3_flush_err(xid, persistent_fid, tcon->tid, ses->Suid,
|
|
rc);
|
|
} else
|
|
trace_smb3_flush_done(xid, persistent_fid, tcon->tid,
|
|
ses->Suid);
|
|
|
|
flush_exit:
|
|
SMB2_flush_free(&rqst);
|
|
free_rsp_buf(resp_buftype, rsp_iov.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(void **buf, unsigned int *total_len,
|
|
struct cifs_io_parms *io_parms, struct cifs_readdata *rdata,
|
|
unsigned int remaining_bytes, int request_type)
|
|
{
|
|
int rc = -EACCES;
|
|
struct smb2_read_plain_req *req = NULL;
|
|
struct smb2_sync_hdr *shdr;
|
|
struct TCP_Server_Info *server;
|
|
|
|
rc = smb2_plain_req_init(SMB2_READ, io_parms->tcon, (void **) &req,
|
|
total_len);
|
|
if (rc)
|
|
return rc;
|
|
|
|
server = io_parms->tcon->ses->server;
|
|
if (server == NULL)
|
|
return -ECONNABORTED;
|
|
|
|
shdr = &req->sync_hdr;
|
|
shdr->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);
|
|
|
|
trace_smb3_read_enter(0 /* xid */,
|
|
io_parms->persistent_fid,
|
|
io_parms->tcon->tid, io_parms->tcon->ses->Suid,
|
|
io_parms->offset, io_parms->length);
|
|
#ifdef CONFIG_CIFS_SMB_DIRECT
|
|
/*
|
|
* If we want to do a RDMA write, fill in and append
|
|
* smbd_buffer_descriptor_v1 to the end of read request
|
|
*/
|
|
if (server->rdma && rdata && !server->sign &&
|
|
rdata->bytes >= server->smbd_conn->rdma_readwrite_threshold) {
|
|
|
|
struct smbd_buffer_descriptor_v1 *v1;
|
|
bool need_invalidate =
|
|
io_parms->tcon->ses->server->dialect == SMB30_PROT_ID;
|
|
|
|
rdata->mr = smbd_register_mr(
|
|
server->smbd_conn, rdata->pages,
|
|
rdata->nr_pages, rdata->page_offset,
|
|
rdata->tailsz, true, need_invalidate);
|
|
if (!rdata->mr)
|
|
return -EAGAIN;
|
|
|
|
req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE;
|
|
if (need_invalidate)
|
|
req->Channel = SMB2_CHANNEL_RDMA_V1;
|
|
req->ReadChannelInfoOffset =
|
|
cpu_to_le16(offsetof(struct smb2_read_plain_req, Buffer));
|
|
req->ReadChannelInfoLength =
|
|
cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1));
|
|
v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0];
|
|
v1->offset = cpu_to_le64(rdata->mr->mr->iova);
|
|
v1->token = cpu_to_le32(rdata->mr->mr->rkey);
|
|
v1->length = cpu_to_le32(rdata->mr->mr->length);
|
|
|
|
*total_len += sizeof(*v1) - 1;
|
|
}
|
|
#endif
|
|
if (request_type & CHAINED_REQUEST) {
|
|
if (!(request_type & END_OF_CHAIN)) {
|
|
/* next 8-byte aligned request */
|
|
*total_len = DIV_ROUND_UP(*total_len, 8) * 8;
|
|
shdr->NextCommand = cpu_to_le32(*total_len);
|
|
} else /* END_OF_CHAIN */
|
|
shdr->NextCommand = 0;
|
|
if (request_type & RELATED_REQUEST) {
|
|
shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
|
|
/*
|
|
* Related requests use info from previous read request
|
|
* in chain.
|
|
*/
|
|
shdr->SessionId = 0xFFFFFFFF;
|
|
shdr->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;
|
|
|
|
*buf = req;
|
|
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_sync_hdr *shdr =
|
|
(struct smb2_sync_hdr *)rdata->iov[0].iov_base;
|
|
struct cifs_credits credits = { .value = 0, .instance = 0 };
|
|
struct smb_rqst rqst = { .rq_iov = &rdata->iov[1],
|
|
.rq_nvec = 1,
|
|
.rq_pages = rdata->pages,
|
|
.rq_offset = rdata->page_offset,
|
|
.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.value = le16_to_cpu(shdr->CreditRequest);
|
|
credits.instance = server->reconnect_instance;
|
|
/* result already set, check signature */
|
|
if (server->sign && !mid->decrypted) {
|
|
int rc;
|
|
|
|
rc = smb2_verify_signature(&rqst, server);
|
|
if (rc)
|
|
cifs_tcon_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;
|
|
case MID_RESPONSE_MALFORMED:
|
|
credits.value = le16_to_cpu(shdr->CreditRequest);
|
|
credits.instance = server->reconnect_instance;
|
|
/* fall through */
|
|
default:
|
|
rdata->result = -EIO;
|
|
}
|
|
#ifdef CONFIG_CIFS_SMB_DIRECT
|
|
/*
|
|
* If this rdata has a memmory registered, the MR can be freed
|
|
* MR needs to be freed as soon as I/O finishes to prevent deadlock
|
|
* because they have limited number and are used for future I/Os
|
|
*/
|
|
if (rdata->mr) {
|
|
smbd_deregister_mr(rdata->mr);
|
|
rdata->mr = NULL;
|
|
}
|
|
#endif
|
|
if (rdata->result && rdata->result != -ENODATA) {
|
|
cifs_stats_fail_inc(tcon, SMB2_READ_HE);
|
|
trace_smb3_read_err(0 /* xid */,
|
|
rdata->cfile->fid.persistent_fid,
|
|
tcon->tid, tcon->ses->Suid, rdata->offset,
|
|
rdata->bytes, rdata->result);
|
|
} else
|
|
trace_smb3_read_done(0 /* xid */,
|
|
rdata->cfile->fid.persistent_fid,
|
|
tcon->tid, tcon->ses->Suid,
|
|
rdata->offset, rdata->got_bytes);
|
|
|
|
queue_work(cifsiod_wq, &rdata->work);
|
|
DeleteMidQEntry(mid);
|
|
add_credits(server, &credits, 0);
|
|
}
|
|
|
|
/* smb2_async_readv - send an async read, and set up mid to handle result */
|
|
int
|
|
smb2_async_readv(struct cifs_readdata *rdata)
|
|
{
|
|
int rc, flags = 0;
|
|
char *buf;
|
|
struct smb2_sync_hdr *shdr;
|
|
struct cifs_io_parms io_parms;
|
|
struct smb_rqst rqst = { .rq_iov = rdata->iov,
|
|
.rq_nvec = 1 };
|
|
struct TCP_Server_Info *server;
|
|
unsigned int total_len;
|
|
|
|
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(
|
|
(void **) &buf, &total_len, &io_parms, rdata, 0, 0);
|
|
if (rc)
|
|
return rc;
|
|
|
|
if (smb3_encryption_required(io_parms.tcon))
|
|
flags |= CIFS_TRANSFORM_REQ;
|
|
|
|
rdata->iov[0].iov_base = buf;
|
|
rdata->iov[0].iov_len = total_len;
|
|
|
|
shdr = (struct smb2_sync_hdr *)buf;
|
|
|
|
if (rdata->credits.value > 0) {
|
|
shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(rdata->bytes,
|
|
SMB2_MAX_BUFFER_SIZE));
|
|
shdr->CreditRequest =
|
|
cpu_to_le16(le16_to_cpu(shdr->CreditCharge) + 1);
|
|
|
|
rc = adjust_credits(server, &rdata->credits, rdata->bytes);
|
|
if (rc)
|
|
goto async_readv_out;
|
|
|
|
flags |= CIFS_HAS_CREDITS;
|
|
}
|
|
|
|
kref_get(&rdata->refcount);
|
|
rc = cifs_call_async(io_parms.tcon->ses->server, &rqst,
|
|
cifs_readv_receive, smb2_readv_callback,
|
|
smb3_handle_read_data, rdata, flags,
|
|
&rdata->credits);
|
|
if (rc) {
|
|
kref_put(&rdata->refcount, cifs_readdata_release);
|
|
cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE);
|
|
trace_smb3_read_err(0 /* xid */, io_parms.persistent_fid,
|
|
io_parms.tcon->tid,
|
|
io_parms.tcon->ses->Suid,
|
|
io_parms.offset, io_parms.length, rc);
|
|
}
|
|
|
|
async_readv_out:
|
|
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)
|
|
{
|
|
struct smb_rqst rqst;
|
|
int resp_buftype, rc;
|
|
struct smb2_read_plain_req *req = NULL;
|
|
struct smb2_read_rsp *rsp = NULL;
|
|
struct kvec iov[1];
|
|
struct kvec rsp_iov;
|
|
unsigned int total_len;
|
|
int flags = CIFS_LOG_ERROR;
|
|
struct cifs_ses *ses = io_parms->tcon->ses;
|
|
|
|
*nbytes = 0;
|
|
rc = smb2_new_read_req((void **)&req, &total_len, io_parms, NULL, 0, 0);
|
|
if (rc)
|
|
return rc;
|
|
|
|
if (smb3_encryption_required(io_parms->tcon))
|
|
flags |= CIFS_TRANSFORM_REQ;
|
|
|
|
iov[0].iov_base = (char *)req;
|
|
iov[0].iov_len = total_len;
|
|
|
|
memset(&rqst, 0, sizeof(struct smb_rqst));
|
|
rqst.rq_iov = iov;
|
|
rqst.rq_nvec = 1;
|
|
|
|
rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
|
|
rsp = (struct smb2_read_rsp *)rsp_iov.iov_base;
|
|
|
|
if (rc) {
|
|
if (rc != -ENODATA) {
|
|
cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE);
|
|
cifs_dbg(VFS, "Send error in read = %d\n", rc);
|
|
trace_smb3_read_err(xid, req->PersistentFileId,
|
|
io_parms->tcon->tid, ses->Suid,
|
|
io_parms->offset, io_parms->length,
|
|
rc);
|
|
} else
|
|
trace_smb3_read_done(xid, req->PersistentFileId,
|
|
io_parms->tcon->tid, ses->Suid,
|
|
io_parms->offset, 0);
|
|
free_rsp_buf(resp_buftype, rsp_iov.iov_base);
|
|
cifs_small_buf_release(req);
|
|
return rc == -ENODATA ? 0 : rc;
|
|
} else
|
|
trace_smb3_read_done(xid, req->PersistentFileId,
|
|
io_parms->tcon->tid, ses->Suid,
|
|
io_parms->offset, io_parms->length);
|
|
|
|
cifs_small_buf_release(req);
|
|
|
|
*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 + rsp->DataOffset, *nbytes);
|
|
free_rsp_buf(resp_buftype, rsp_iov.iov_base);
|
|
} else if (resp_buftype != CIFS_NO_BUFFER) {
|
|
*buf = rsp_iov.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;
|
|
struct cifs_credits credits = { .value = 0, .instance = 0 };
|
|
|
|
switch (mid->mid_state) {
|
|
case MID_RESPONSE_RECEIVED:
|
|
credits.value = le16_to_cpu(rsp->sync_hdr.CreditRequest);
|
|
credits.instance = server->reconnect_instance;
|
|
wdata->result = smb2_check_receive(mid, 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;
|
|
case MID_RESPONSE_MALFORMED:
|
|
credits.value = le16_to_cpu(rsp->sync_hdr.CreditRequest);
|
|
credits.instance = server->reconnect_instance;
|
|
/* fall through */
|
|
default:
|
|
wdata->result = -EIO;
|
|
break;
|
|
}
|
|
#ifdef CONFIG_CIFS_SMB_DIRECT
|
|
/*
|
|
* If this wdata has a memory registered, the MR can be freed
|
|
* The number of MRs available is limited, it's important to recover
|
|
* used MR as soon as I/O is finished. Hold MR longer in the later
|
|
* I/O process can possibly result in I/O deadlock due to lack of MR
|
|
* to send request on I/O retry
|
|
*/
|
|
if (wdata->mr) {
|
|
smbd_deregister_mr(wdata->mr);
|
|
wdata->mr = NULL;
|
|
}
|
|
#endif
|
|
if (wdata->result) {
|
|
cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
|
|
trace_smb3_write_err(0 /* no xid */,
|
|
wdata->cfile->fid.persistent_fid,
|
|
tcon->tid, tcon->ses->Suid, wdata->offset,
|
|
wdata->bytes, wdata->result);
|
|
if (wdata->result == -ENOSPC)
|
|
printk_once(KERN_WARNING "Out of space writing to %s\n",
|
|
tcon->treeName);
|
|
} else
|
|
trace_smb3_write_done(0 /* no xid */,
|
|
wdata->cfile->fid.persistent_fid,
|
|
tcon->tid, tcon->ses->Suid,
|
|
wdata->offset, wdata->bytes);
|
|
|
|
queue_work(cifsiod_wq, &wdata->work);
|
|
DeleteMidQEntry(mid);
|
|
add_credits(server, &credits, 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 smb2_sync_hdr *shdr;
|
|
struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
|
|
struct TCP_Server_Info *server = tcon->ses->server;
|
|
struct kvec iov[1];
|
|
struct smb_rqst rqst = { };
|
|
unsigned int total_len;
|
|
|
|
rc = smb2_plain_req_init(SMB2_WRITE, tcon, (void **) &req, &total_len);
|
|
if (rc)
|
|
return rc;
|
|
|
|
if (smb3_encryption_required(tcon))
|
|
flags |= CIFS_TRANSFORM_REQ;
|
|
|
|
shdr = (struct smb2_sync_hdr *)req;
|
|
shdr->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);
|
|
req->DataOffset = cpu_to_le16(
|
|
offsetof(struct smb2_write_req, Buffer));
|
|
req->RemainingBytes = 0;
|
|
|
|
trace_smb3_write_enter(0 /* xid */, wdata->cfile->fid.persistent_fid,
|
|
tcon->tid, tcon->ses->Suid, wdata->offset, wdata->bytes);
|
|
#ifdef CONFIG_CIFS_SMB_DIRECT
|
|
/*
|
|
* If we want to do a server RDMA read, fill in and append
|
|
* smbd_buffer_descriptor_v1 to the end of write request
|
|
*/
|
|
if (server->rdma && !server->sign && wdata->bytes >=
|
|
server->smbd_conn->rdma_readwrite_threshold) {
|
|
|
|
struct smbd_buffer_descriptor_v1 *v1;
|
|
bool need_invalidate = server->dialect == SMB30_PROT_ID;
|
|
|
|
wdata->mr = smbd_register_mr(
|
|
server->smbd_conn, wdata->pages,
|
|
wdata->nr_pages, wdata->page_offset,
|
|
wdata->tailsz, false, need_invalidate);
|
|
if (!wdata->mr) {
|
|
rc = -EAGAIN;
|
|
goto async_writev_out;
|
|
}
|
|
req->Length = 0;
|
|
req->DataOffset = 0;
|
|
if (wdata->nr_pages > 1)
|
|
req->RemainingBytes =
|
|
cpu_to_le32(
|
|
(wdata->nr_pages - 1) * wdata->pagesz -
|
|
wdata->page_offset + wdata->tailsz
|
|
);
|
|
else
|
|
req->RemainingBytes = cpu_to_le32(wdata->tailsz);
|
|
req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE;
|
|
if (need_invalidate)
|
|
req->Channel = SMB2_CHANNEL_RDMA_V1;
|
|
req->WriteChannelInfoOffset =
|
|
cpu_to_le16(offsetof(struct smb2_write_req, Buffer));
|
|
req->WriteChannelInfoLength =
|
|
cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1));
|
|
v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0];
|
|
v1->offset = cpu_to_le64(wdata->mr->mr->iova);
|
|
v1->token = cpu_to_le32(wdata->mr->mr->rkey);
|
|
v1->length = cpu_to_le32(wdata->mr->mr->length);
|
|
}
|
|
#endif
|
|
iov[0].iov_len = total_len - 1;
|
|
iov[0].iov_base = (char *)req;
|
|
|
|
rqst.rq_iov = iov;
|
|
rqst.rq_nvec = 1;
|
|
rqst.rq_pages = wdata->pages;
|
|
rqst.rq_offset = wdata->page_offset;
|
|
rqst.rq_npages = wdata->nr_pages;
|
|
rqst.rq_pagesz = wdata->pagesz;
|
|
rqst.rq_tailsz = wdata->tailsz;
|
|
#ifdef CONFIG_CIFS_SMB_DIRECT
|
|
if (wdata->mr) {
|
|
iov[0].iov_len += sizeof(struct smbd_buffer_descriptor_v1);
|
|
rqst.rq_npages = 0;
|
|
}
|
|
#endif
|
|
cifs_dbg(FYI, "async write at %llu %u bytes\n",
|
|
wdata->offset, wdata->bytes);
|
|
|
|
#ifdef CONFIG_CIFS_SMB_DIRECT
|
|
/* For RDMA read, I/O size is in RemainingBytes not in Length */
|
|
if (!wdata->mr)
|
|
req->Length = cpu_to_le32(wdata->bytes);
|
|
#else
|
|
req->Length = cpu_to_le32(wdata->bytes);
|
|
#endif
|
|
|
|
if (wdata->credits.value > 0) {
|
|
shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(wdata->bytes,
|
|
SMB2_MAX_BUFFER_SIZE));
|
|
shdr->CreditRequest =
|
|
cpu_to_le16(le16_to_cpu(shdr->CreditCharge) + 1);
|
|
|
|
rc = adjust_credits(server, &wdata->credits, wdata->bytes);
|
|
if (rc)
|
|
goto async_writev_out;
|
|
|
|
flags |= CIFS_HAS_CREDITS;
|
|
}
|
|
|
|
kref_get(&wdata->refcount);
|
|
rc = cifs_call_async(server, &rqst, NULL, smb2_writev_callback, NULL,
|
|
wdata, flags, &wdata->credits);
|
|
|
|
if (rc) {
|
|
trace_smb3_write_err(0 /* no xid */, req->PersistentFileId,
|
|
tcon->tid, tcon->ses->Suid, wdata->offset,
|
|
wdata->bytes, 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)
|
|
{
|
|
struct smb_rqst rqst;
|
|
int rc = 0;
|
|
struct smb2_write_req *req = NULL;
|
|
struct smb2_write_rsp *rsp = NULL;
|
|
int resp_buftype;
|
|
struct kvec rsp_iov;
|
|
int flags = 0;
|
|
unsigned int total_len;
|
|
|
|
*nbytes = 0;
|
|
|
|
if (n_vec < 1)
|
|
return rc;
|
|
|
|
rc = smb2_plain_req_init(SMB2_WRITE, io_parms->tcon, (void **) &req,
|
|
&total_len);
|
|
if (rc)
|
|
return rc;
|
|
|
|
if (io_parms->tcon->ses->server == NULL)
|
|
return -ECONNABORTED;
|
|
|
|
if (smb3_encryption_required(io_parms->tcon))
|
|
flags |= CIFS_TRANSFORM_REQ;
|
|
|
|
req->sync_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);
|
|
req->DataOffset = cpu_to_le16(
|
|
offsetof(struct smb2_write_req, Buffer));
|
|
req->RemainingBytes = 0;
|
|
|
|
trace_smb3_write_enter(xid, io_parms->persistent_fid,
|
|
io_parms->tcon->tid, io_parms->tcon->ses->Suid,
|
|
io_parms->offset, io_parms->length);
|
|
|
|
iov[0].iov_base = (char *)req;
|
|
/* 1 for Buffer */
|
|
iov[0].iov_len = total_len - 1;
|
|
|
|
memset(&rqst, 0, sizeof(struct smb_rqst));
|
|
rqst.rq_iov = iov;
|
|
rqst.rq_nvec = n_vec + 1;
|
|
|
|
rc = cifs_send_recv(xid, io_parms->tcon->ses, &rqst,
|
|
&resp_buftype, flags, &rsp_iov);
|
|
rsp = (struct smb2_write_rsp *)rsp_iov.iov_base;
|
|
|
|
if (rc) {
|
|
trace_smb3_write_err(xid, req->PersistentFileId,
|
|
io_parms->tcon->tid,
|
|
io_parms->tcon->ses->Suid,
|
|
io_parms->offset, io_parms->length, 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);
|
|
trace_smb3_write_done(xid, req->PersistentFileId,
|
|
io_parms->tcon->tid,
|
|
io_parms->tcon->ses->Suid,
|
|
io_parms->offset, *nbytes);
|
|
}
|
|
|
|
cifs_small_buf_release(req);
|
|
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;
|
|
char *entryptr;
|
|
FILE_DIRECTORY_INFO *dir_info;
|
|
|
|
if (bufstart == NULL)
|
|
return 0;
|
|
|
|
entryptr = bufstart;
|
|
|
|
while (1) {
|
|
if (entryptr + next_offset < entryptr ||
|
|
entryptr + next_offset > end_of_buf ||
|
|
entryptr + next_offset + size > end_of_buf) {
|
|
cifs_dbg(VFS, "malformed search entry would overflow\n");
|
|
break;
|
|
}
|
|
|
|
entryptr = entryptr + next_offset;
|
|
dir_info = (FILE_DIRECTORY_INFO *)entryptr;
|
|
|
|
len = le32_to_cpu(dir_info->FileNameLength);
|
|
if (entryptr + len < entryptr ||
|
|
entryptr + len > end_of_buf ||
|
|
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 = entryptr;
|
|
entrycount++;
|
|
|
|
next_offset = le32_to_cpu(dir_info->NextEntryOffset);
|
|
if (!next_offset)
|
|
break;
|
|
}
|
|
|
|
return entrycount;
|
|
}
|
|
|
|
/*
|
|
* Readdir/FindFirst
|
|
*/
|
|
int SMB2_query_directory_init(const unsigned int xid,
|
|
struct cifs_tcon *tcon, struct smb_rqst *rqst,
|
|
u64 persistent_fid, u64 volatile_fid,
|
|
int index, int info_level)
|
|
{
|
|
struct TCP_Server_Info *server = tcon->ses->server;
|
|
struct smb2_query_directory_req *req;
|
|
unsigned char *bufptr;
|
|
__le16 asteriks = cpu_to_le16('*');
|
|
unsigned int output_size = CIFSMaxBufSize -
|
|
MAX_SMB2_CREATE_RESPONSE_SIZE -
|
|
MAX_SMB2_CLOSE_RESPONSE_SIZE;
|
|
unsigned int total_len;
|
|
struct kvec *iov = rqst->rq_iov;
|
|
int len, rc;
|
|
|
|
rc = smb2_plain_req_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req,
|
|
&total_len);
|
|
if (rc)
|
|
return rc;
|
|
|
|
switch (info_level) {
|
|
case SMB_FIND_FILE_DIRECTORY_INFO:
|
|
req->FileInformationClass = FILE_DIRECTORY_INFORMATION;
|
|
break;
|
|
case SMB_FIND_FILE_ID_FULL_DIR_INFO:
|
|
req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION;
|
|
break;
|
|
default:
|
|
cifs_tcon_dbg(VFS, "info level %u isn't supported\n",
|
|
info_level);
|
|
return -EINVAL;
|
|
}
|
|
|
|
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);
|
|
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;
|
|
/* 1 for Buffer */
|
|
iov[0].iov_len = total_len - 1;
|
|
|
|
iov[1].iov_base = (char *)(req->Buffer);
|
|
iov[1].iov_len = len;
|
|
|
|
trace_smb3_query_dir_enter(xid, persistent_fid, tcon->tid,
|
|
tcon->ses->Suid, index, output_size);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void SMB2_query_directory_free(struct smb_rqst *rqst)
|
|
{
|
|
if (rqst && rqst->rq_iov) {
|
|
cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */
|
|
}
|
|
}
|
|
|
|
int
|
|
smb2_parse_query_directory(struct cifs_tcon *tcon,
|
|
struct kvec *rsp_iov,
|
|
int resp_buftype,
|
|
struct cifs_search_info *srch_inf)
|
|
{
|
|
struct smb2_query_directory_rsp *rsp;
|
|
size_t info_buf_size;
|
|
char *end_of_smb;
|
|
int rc;
|
|
|
|
rsp = (struct smb2_query_directory_rsp *)rsp_iov->iov_base;
|
|
|
|
switch (srch_inf->info_level) {
|
|
case SMB_FIND_FILE_DIRECTORY_INFO:
|
|
info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1;
|
|
break;
|
|
case SMB_FIND_FILE_ID_FULL_DIR_INFO:
|
|
info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1;
|
|
break;
|
|
default:
|
|
cifs_tcon_dbg(VFS, "info level %u isn't supported\n",
|
|
srch_inf->info_level);
|
|
return -EINVAL;
|
|
}
|
|
|
|
rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
|
|
le32_to_cpu(rsp->OutputBufferLength), rsp_iov,
|
|
info_buf_size);
|
|
if (rc)
|
|
return rc;
|
|
|
|
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 =
|
|
(char *)rsp + le16_to_cpu(rsp->OutputBufferOffset);
|
|
end_of_smb = rsp_iov->iov_len + (char *)rsp;
|
|
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_tcon_dbg(VFS, "illegal search buffer type\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
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 smb_rqst rqst;
|
|
struct kvec iov[SMB2_QUERY_DIRECTORY_IOV_SIZE];
|
|
struct smb2_query_directory_rsp *rsp = NULL;
|
|
int resp_buftype = CIFS_NO_BUFFER;
|
|
struct kvec rsp_iov;
|
|
int rc = 0;
|
|
struct cifs_ses *ses = tcon->ses;
|
|
int flags = 0;
|
|
|
|
if (!ses || !(ses->server))
|
|
return -EIO;
|
|
|
|
if (smb3_encryption_required(tcon))
|
|
flags |= CIFS_TRANSFORM_REQ;
|
|
|
|
memset(&rqst, 0, sizeof(struct smb_rqst));
|
|
memset(&iov, 0, sizeof(iov));
|
|
rqst.rq_iov = iov;
|
|
rqst.rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE;
|
|
|
|
rc = SMB2_query_directory_init(xid, tcon, &rqst, persistent_fid,
|
|
volatile_fid, index,
|
|
srch_inf->info_level);
|
|
if (rc)
|
|
goto qdir_exit;
|
|
|
|
rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
|
|
rsp = (struct smb2_query_directory_rsp *)rsp_iov.iov_base;
|
|
|
|
if (rc) {
|
|
if (rc == -ENODATA &&
|
|
rsp->sync_hdr.Status == STATUS_NO_MORE_FILES) {
|
|
trace_smb3_query_dir_done(xid, persistent_fid,
|
|
tcon->tid, tcon->ses->Suid, index, 0);
|
|
srch_inf->endOfSearch = true;
|
|
rc = 0;
|
|
} else {
|
|
trace_smb3_query_dir_err(xid, persistent_fid, tcon->tid,
|
|
tcon->ses->Suid, index, 0, rc);
|
|
cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE);
|
|
}
|
|
goto qdir_exit;
|
|
}
|
|
|
|
rc = smb2_parse_query_directory(tcon, &rsp_iov, resp_buftype,
|
|
srch_inf);
|
|
if (rc) {
|
|
trace_smb3_query_dir_err(xid, persistent_fid, tcon->tid,
|
|
tcon->ses->Suid, index, 0, rc);
|
|
goto qdir_exit;
|
|
}
|
|
resp_buftype = CIFS_NO_BUFFER;
|
|
|
|
trace_smb3_query_dir_done(xid, persistent_fid, tcon->tid,
|
|
tcon->ses->Suid, index, srch_inf->entries_in_buffer);
|
|
|
|
qdir_exit:
|
|
SMB2_query_directory_free(&rqst);
|
|
free_rsp_buf(resp_buftype, rsp);
|
|
return rc;
|
|
}
|
|
|
|
int
|
|
SMB2_set_info_init(struct cifs_tcon *tcon, struct smb_rqst *rqst,
|
|
u64 persistent_fid, u64 volatile_fid, u32 pid, u8 info_class,
|
|
u8 info_type, u32 additional_info,
|
|
void **data, unsigned int *size)
|
|
{
|
|
struct smb2_set_info_req *req;
|
|
struct kvec *iov = rqst->rq_iov;
|
|
unsigned int i, total_len;
|
|
int rc;
|
|
|
|
rc = smb2_plain_req_init(SMB2_SET_INFO, tcon, (void **) &req, &total_len);
|
|
if (rc)
|
|
return rc;
|
|
|
|
req->sync_hdr.ProcessId = cpu_to_le32(pid);
|
|
req->InfoType = info_type;
|
|
req->FileInfoClass = info_class;
|
|
req->PersistentFileId = persistent_fid;
|
|
req->VolatileFileId = volatile_fid;
|
|
req->AdditionalInformation = cpu_to_le32(additional_info);
|
|
|
|
req->BufferOffset =
|
|
cpu_to_le16(sizeof(struct smb2_set_info_req) - 1);
|
|
req->BufferLength = cpu_to_le32(*size);
|
|
|
|
memcpy(req->Buffer, *data, *size);
|
|
total_len += *size;
|
|
|
|
iov[0].iov_base = (char *)req;
|
|
/* 1 for Buffer */
|
|
iov[0].iov_len = total_len - 1;
|
|
|
|
for (i = 1; i < rqst->rq_nvec; i++) {
|
|
le32_add_cpu(&req->BufferLength, size[i]);
|
|
iov[i].iov_base = (char *)data[i];
|
|
iov[i].iov_len = size[i];
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
SMB2_set_info_free(struct smb_rqst *rqst)
|
|
{
|
|
if (rqst && rqst->rq_iov)
|
|
cifs_buf_release(rqst->rq_iov[0].iov_base); /* request */
|
|
}
|
|
|
|
static int
|
|
send_set_info(const unsigned int xid, struct cifs_tcon *tcon,
|
|
u64 persistent_fid, u64 volatile_fid, u32 pid, u8 info_class,
|
|
u8 info_type, u32 additional_info, unsigned int num,
|
|
void **data, unsigned int *size)
|
|
{
|
|
struct smb_rqst rqst;
|
|
struct smb2_set_info_rsp *rsp = NULL;
|
|
struct kvec *iov;
|
|
struct kvec rsp_iov;
|
|
int rc = 0;
|
|
int resp_buftype;
|
|
struct cifs_ses *ses = tcon->ses;
|
|
int flags = 0;
|
|
|
|
if (!ses || !(ses->server))
|
|
return -EIO;
|
|
|
|
if (!num)
|
|
return -EINVAL;
|
|
|
|
if (smb3_encryption_required(tcon))
|
|
flags |= CIFS_TRANSFORM_REQ;
|
|
|
|
iov = kmalloc_array(num, sizeof(struct kvec), GFP_KERNEL);
|
|
if (!iov)
|
|
return -ENOMEM;
|
|
|
|
memset(&rqst, 0, sizeof(struct smb_rqst));
|
|
rqst.rq_iov = iov;
|
|
rqst.rq_nvec = num;
|
|
|
|
rc = SMB2_set_info_init(tcon, &rqst, persistent_fid, volatile_fid, pid,
|
|
info_class, info_type, additional_info,
|
|
data, size);
|
|
if (rc) {
|
|
kfree(iov);
|
|
return rc;
|
|
}
|
|
|
|
|
|
rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags,
|
|
&rsp_iov);
|
|
SMB2_set_info_free(&rqst);
|
|
rsp = (struct smb2_set_info_rsp *)rsp_iov.iov_base;
|
|
|
|
if (rc != 0) {
|
|
cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE);
|
|
trace_smb3_set_info_err(xid, persistent_fid, tcon->tid,
|
|
ses->Suid, info_class, (__u32)info_type, rc);
|
|
}
|
|
|
|
free_rsp_buf(resp_buftype, rsp);
|
|
kfree(iov);
|
|
return rc;
|
|
}
|
|
|
|
int
|
|
SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
|
|
u64 volatile_fid, u32 pid, __le64 *eof)
|
|
{
|
|
struct smb2_file_eof_info info;
|
|
void *data;
|
|
unsigned int size;
|
|
|
|
info.EndOfFile = *eof;
|
|
|
|
data = &info;
|
|
size = sizeof(struct smb2_file_eof_info);
|
|
|
|
return send_set_info(xid, tcon, persistent_fid, volatile_fid,
|
|
pid, FILE_END_OF_FILE_INFORMATION, SMB2_O_INFO_FILE,
|
|
0, 1, &data, &size);
|
|
}
|
|
|
|
int
|
|
SMB2_set_acl(const unsigned int xid, struct cifs_tcon *tcon,
|
|
u64 persistent_fid, u64 volatile_fid,
|
|
struct cifs_ntsd *pnntsd, int pacllen, int aclflag)
|
|
{
|
|
return send_set_info(xid, tcon, persistent_fid, volatile_fid,
|
|
current->tgid, 0, SMB2_O_INFO_SECURITY, aclflag,
|
|
1, (void **)&pnntsd, &pacllen);
|
|
}
|
|
|
|
int
|
|
SMB2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
|
|
u64 persistent_fid, u64 volatile_fid,
|
|
struct smb2_file_full_ea_info *buf, int len)
|
|
{
|
|
return send_set_info(xid, tcon, persistent_fid, volatile_fid,
|
|
current->tgid, FILE_FULL_EA_INFORMATION, SMB2_O_INFO_FILE,
|
|
0, 1, (void **)&buf, &len);
|
|
}
|
|
|
|
int
|
|
SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
|
|
const u64 persistent_fid, const u64 volatile_fid,
|
|
__u8 oplock_level)
|
|
{
|
|
struct smb_rqst rqst;
|
|
int rc;
|
|
struct smb2_oplock_break *req = NULL;
|
|
struct cifs_ses *ses = tcon->ses;
|
|
int flags = CIFS_OBREAK_OP;
|
|
unsigned int total_len;
|
|
struct kvec iov[1];
|
|
struct kvec rsp_iov;
|
|
int resp_buf_type;
|
|
|
|
cifs_dbg(FYI, "SMB2_oplock_break\n");
|
|
rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req,
|
|
&total_len);
|
|
if (rc)
|
|
return rc;
|
|
|
|
if (smb3_encryption_required(tcon))
|
|
flags |= CIFS_TRANSFORM_REQ;
|
|
|
|
req->VolatileFid = volatile_fid;
|
|
req->PersistentFid = persistent_fid;
|
|
req->OplockLevel = oplock_level;
|
|
req->sync_hdr.CreditRequest = cpu_to_le16(1);
|
|
|
|
flags |= CIFS_NO_RSP_BUF;
|
|
|
|
iov[0].iov_base = (char *)req;
|
|
iov[0].iov_len = total_len;
|
|
|
|
memset(&rqst, 0, sizeof(struct smb_rqst));
|
|
rqst.rq_iov = iov;
|
|
rqst.rq_nvec = 1;
|
|
|
|
rc = cifs_send_recv(xid, ses, &rqst, &resp_buf_type, flags, &rsp_iov);
|
|
cifs_small_buf_release(req);
|
|
|
|
if (rc) {
|
|
cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
|
|
cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc);
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
void
|
|
smb2_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 = kst->f_bavail =
|
|
le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits);
|
|
return;
|
|
}
|
|
|
|
static void
|
|
copy_posix_fs_info_to_kstatfs(FILE_SYSTEM_POSIX_INFO *response_data,
|
|
struct kstatfs *kst)
|
|
{
|
|
kst->f_bsize = le32_to_cpu(response_data->BlockSize);
|
|
kst->f_blocks = le64_to_cpu(response_data->TotalBlocks);
|
|
kst->f_bfree = le64_to_cpu(response_data->BlocksAvail);
|
|
if (response_data->UserBlocksAvail == cpu_to_le64(-1))
|
|
kst->f_bavail = kst->f_bfree;
|
|
else
|
|
kst->f_bavail = le64_to_cpu(response_data->UserBlocksAvail);
|
|
if (response_data->TotalFileNodes != cpu_to_le64(-1))
|
|
kst->f_files = le64_to_cpu(response_data->TotalFileNodes);
|
|
if (response_data->FreeFileNodes != cpu_to_le64(-1))
|
|
kst->f_ffree = le64_to_cpu(response_data->FreeFileNodes);
|
|
|
|
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;
|
|
unsigned int total_len;
|
|
|
|
cifs_dbg(FYI, "Query FSInfo level %d\n", level);
|
|
|
|
if ((tcon->ses == NULL) || (tcon->ses->server == NULL))
|
|
return -EIO;
|
|
|
|
rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, (void **) &req,
|
|
&total_len);
|
|
if (rc)
|
|
return rc;
|
|
|
|
req->InfoType = SMB2_O_INFO_FILESYSTEM;
|
|
req->FileInfoClass = level;
|
|
req->PersistentFileId = persistent_fid;
|
|
req->VolatileFileId = volatile_fid;
|
|
/* 1 for pad */
|
|
req->InputBufferOffset =
|
|
cpu_to_le16(sizeof(struct smb2_query_info_req) - 1);
|
|
req->OutputBufferLength = cpu_to_le32(
|
|
outbuf_len + sizeof(struct smb2_query_info_rsp) - 1);
|
|
|
|
iov->iov_base = (char *)req;
|
|
iov->iov_len = total_len;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
SMB311_posix_qfs_info(const unsigned int xid, struct cifs_tcon *tcon,
|
|
u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
|
|
{
|
|
struct smb_rqst rqst;
|
|
struct smb2_query_info_rsp *rsp = NULL;
|
|
struct kvec iov;
|
|
struct kvec rsp_iov;
|
|
int rc = 0;
|
|
int resp_buftype;
|
|
struct cifs_ses *ses = tcon->ses;
|
|
FILE_SYSTEM_POSIX_INFO *info = NULL;
|
|
int flags = 0;
|
|
|
|
rc = build_qfs_info_req(&iov, tcon, FS_POSIX_INFORMATION,
|
|
sizeof(FILE_SYSTEM_POSIX_INFO),
|
|
persistent_fid, volatile_fid);
|
|
if (rc)
|
|
return rc;
|
|
|
|
if (smb3_encryption_required(tcon))
|
|
flags |= CIFS_TRANSFORM_REQ;
|
|
|
|
memset(&rqst, 0, sizeof(struct smb_rqst));
|
|
rqst.rq_iov = &iov;
|
|
rqst.rq_nvec = 1;
|
|
|
|
rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
|
|
cifs_small_buf_release(iov.iov_base);
|
|
if (rc) {
|
|
cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
|
|
goto posix_qfsinf_exit;
|
|
}
|
|
rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
|
|
|
|
info = (FILE_SYSTEM_POSIX_INFO *)(
|
|
le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
|
|
rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
|
|
le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
|
|
sizeof(FILE_SYSTEM_POSIX_INFO));
|
|
if (!rc)
|
|
copy_posix_fs_info_to_kstatfs(info, fsdata);
|
|
|
|
posix_qfsinf_exit:
|
|
free_rsp_buf(resp_buftype, rsp_iov.iov_base);
|
|
return rc;
|
|
}
|
|
|
|
int
|
|
SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
|
|
u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
|
|
{
|
|
struct smb_rqst rqst;
|
|
struct smb2_query_info_rsp *rsp = NULL;
|
|
struct kvec iov;
|
|
struct kvec rsp_iov;
|
|
int rc = 0;
|
|
int resp_buftype;
|
|
struct cifs_ses *ses = tcon->ses;
|
|
struct smb2_fs_full_size_info *info = NULL;
|
|
int flags = 0;
|
|
|
|
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;
|
|
|
|
if (smb3_encryption_required(tcon))
|
|
flags |= CIFS_TRANSFORM_REQ;
|
|
|
|
memset(&rqst, 0, sizeof(struct smb_rqst));
|
|
rqst.rq_iov = &iov;
|
|
rqst.rq_nvec = 1;
|
|
|
|
rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
|
|
cifs_small_buf_release(iov.iov_base);
|
|
if (rc) {
|
|
cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
|
|
goto qfsinf_exit;
|
|
}
|
|
rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
|
|
|
|
info = (struct smb2_fs_full_size_info *)(
|
|
le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
|
|
rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
|
|
le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
|
|
sizeof(struct smb2_fs_full_size_info));
|
|
if (!rc)
|
|
smb2_copy_fs_info_to_kstatfs(info, fsdata);
|
|
|
|
qfsinf_exit:
|
|
free_rsp_buf(resp_buftype, rsp_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 smb_rqst rqst;
|
|
struct smb2_query_info_rsp *rsp = NULL;
|
|
struct kvec iov;
|
|
struct kvec rsp_iov;
|
|
int rc = 0;
|
|
int resp_buftype, max_len, min_len;
|
|
struct cifs_ses *ses = tcon->ses;
|
|
unsigned int rsp_len, offset;
|
|
int flags = 0;
|
|
|
|
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 if (level == FS_VOLUME_INFORMATION) {
|
|
max_len = sizeof(struct smb3_fs_vol_info) + MAX_VOL_LABEL_LEN;
|
|
min_len = sizeof(struct smb3_fs_vol_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;
|
|
|
|
if (smb3_encryption_required(tcon))
|
|
flags |= CIFS_TRANSFORM_REQ;
|
|
|
|
memset(&rqst, 0, sizeof(struct smb_rqst));
|
|
rqst.rq_iov = &iov;
|
|
rqst.rq_nvec = 1;
|
|
|
|
rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
|
|
cifs_small_buf_release(iov.iov_base);
|
|
if (rc) {
|
|
cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
|
|
goto qfsattr_exit;
|
|
}
|
|
rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
|
|
|
|
rsp_len = le32_to_cpu(rsp->OutputBufferLength);
|
|
offset = le16_to_cpu(rsp->OutputBufferOffset);
|
|
rc = smb2_validate_iov(offset, rsp_len, &rsp_iov, min_len);
|
|
if (rc)
|
|
goto qfsattr_exit;
|
|
|
|
if (level == FS_ATTRIBUTE_INFORMATION)
|
|
memcpy(&tcon->fsAttrInfo, offset
|
|
+ (char *)rsp, min_t(unsigned int,
|
|
rsp_len, max_len));
|
|
else if (level == FS_DEVICE_INFORMATION)
|
|
memcpy(&tcon->fsDevInfo, offset
|
|
+ (char *)rsp, sizeof(FILE_SYSTEM_DEVICE_INFO));
|
|
else if (level == FS_SECTOR_SIZE_INFORMATION) {
|
|
struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *)
|
|
(offset + (char *)rsp);
|
|
tcon->ss_flags = le32_to_cpu(ss_info->Flags);
|
|
tcon->perf_sector_size =
|
|
le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf);
|
|
} else if (level == FS_VOLUME_INFORMATION) {
|
|
struct smb3_fs_vol_info *vol_info = (struct smb3_fs_vol_info *)
|
|
(offset + (char *)rsp);
|
|
tcon->vol_serial_number = vol_info->VolumeSerialNumber;
|
|
tcon->vol_create_time = vol_info->VolumeCreationTime;
|
|
}
|
|
|
|
qfsattr_exit:
|
|
free_rsp_buf(resp_buftype, rsp_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)
|
|
{
|
|
struct smb_rqst rqst;
|
|
int rc = 0;
|
|
struct smb2_lock_req *req = NULL;
|
|
struct kvec iov[2];
|
|
struct kvec rsp_iov;
|
|
int resp_buf_type;
|
|
unsigned int count;
|
|
int flags = CIFS_NO_RSP_BUF;
|
|
unsigned int total_len;
|
|
|
|
cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock);
|
|
|
|
rc = smb2_plain_req_init(SMB2_LOCK, tcon, (void **) &req, &total_len);
|
|
if (rc)
|
|
return rc;
|
|
|
|
if (smb3_encryption_required(tcon))
|
|
flags |= CIFS_TRANSFORM_REQ;
|
|
|
|
req->sync_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);
|
|
|
|
iov[0].iov_base = (char *)req;
|
|
iov[0].iov_len = total_len - sizeof(struct smb2_lock_element);
|
|
iov[1].iov_base = (char *)buf;
|
|
iov[1].iov_len = count;
|
|
|
|
cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
|
|
|
|
memset(&rqst, 0, sizeof(struct smb_rqst));
|
|
rqst.rq_iov = iov;
|
|
rqst.rq_nvec = 2;
|
|
|
|
rc = cifs_send_recv(xid, tcon->ses, &rqst, &resp_buf_type, flags,
|
|
&rsp_iov);
|
|
cifs_small_buf_release(req);
|
|
if (rc) {
|
|
cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc);
|
|
cifs_stats_fail_inc(tcon, SMB2_LOCK_HE);
|
|
trace_smb3_lock_err(xid, persist_fid, tcon->tid,
|
|
tcon->ses->Suid, rc);
|
|
}
|
|
|
|
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)
|
|
{
|
|
struct smb_rqst rqst;
|
|
int rc;
|
|
struct smb2_lease_ack *req = NULL;
|
|
struct cifs_ses *ses = tcon->ses;
|
|
int flags = CIFS_OBREAK_OP;
|
|
unsigned int total_len;
|
|
struct kvec iov[1];
|
|
struct kvec rsp_iov;
|
|
int resp_buf_type;
|
|
__u64 *please_key_high;
|
|
__u64 *please_key_low;
|
|
|
|
cifs_dbg(FYI, "SMB2_lease_break\n");
|
|
rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req,
|
|
&total_len);
|
|
if (rc)
|
|
return rc;
|
|
|
|
if (smb3_encryption_required(tcon))
|
|
flags |= CIFS_TRANSFORM_REQ;
|
|
|
|
req->sync_hdr.CreditRequest = cpu_to_le16(1);
|
|
req->StructureSize = cpu_to_le16(36);
|
|
total_len += 12;
|
|
|
|
memcpy(req->LeaseKey, lease_key, 16);
|
|
req->LeaseState = lease_state;
|
|
|
|
flags |= CIFS_NO_RSP_BUF;
|
|
|
|
iov[0].iov_base = (char *)req;
|
|
iov[0].iov_len = total_len;
|
|
|
|
memset(&rqst, 0, sizeof(struct smb_rqst));
|
|
rqst.rq_iov = iov;
|
|
rqst.rq_nvec = 1;
|
|
|
|
rc = cifs_send_recv(xid, ses, &rqst, &resp_buf_type, flags, &rsp_iov);
|
|
cifs_small_buf_release(req);
|
|
|
|
please_key_low = (__u64 *)lease_key;
|
|
please_key_high = (__u64 *)(lease_key+8);
|
|
if (rc) {
|
|
cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
|
|
trace_smb3_lease_err(le32_to_cpu(lease_state), tcon->tid,
|
|
ses->Suid, *please_key_low, *please_key_high, rc);
|
|
cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc);
|
|
} else
|
|
trace_smb3_lease_done(le32_to_cpu(lease_state), tcon->tid,
|
|
ses->Suid, *please_key_low, *please_key_high);
|
|
|
|
return rc;
|
|
}
|