Add 4.13 (v4.13)

sources/4.13/Kconfig

+config CIFS
+	tristate "SMB3 and CIFS support (advanced network filesystem)"
+	depends on INET
+	select NLS
+	select CRYPTO
+	select CRYPTO_MD4
+	select CRYPTO_MD5
+	select CRYPTO_HMAC
+	select CRYPTO_ARC4
+	select CRYPTO_ECB
+	select CRYPTO_DES
+	help
+	  This is the client VFS module for the SMB3 family of NAS protocols,
+	  as well as for earlier dialects such as SMB2.1, SMB2 and the
+	  Common Internet File System (CIFS) protocol.  CIFS was the successor
+	  to the original dialect, the Server Message Block (SMB) protocol, the
+	  native file sharing mechanism for most early PC operating systems.
+
+	  The SMB3 protocol is supported by most modern operating systems and
+	  NAS appliances (e.g. Samba, Windows 8, Windows 2012, MacOS).
+	  The older CIFS protocol was included in Windows NT4, 2000 and XP (and
+	  later) as well by Samba (which provides excellent CIFS and SMB3
+	  server support for Linux and many other operating systems). Limited
+	  support for OS/2 and Windows ME and similar very old servers is
+	  provided as well.
+
+	  The cifs module provides an advanced network file system client
+	  for mounting to SMB3 (and CIFS) compliant servers.  It includes
+	  support for DFS (hierarchical name space), secure per-user
+	  session establishment via Kerberos or NTLM or NTLMv2,
+	  safe distributed caching (oplock), optional packet
+	  signing, Unicode and other internationalization improvements.
+
+	  In general, the default dialects, SMB3 and later, enable better
+	  performance, security and features, than would be possible with CIFS.
+	  Note that when mounting to Samba, due to the CIFS POSIX extensions,
+	  CIFS mounts can provide slightly better POSIX compatibility
+	  than SMB3 mounts. SMB2/SMB3 mount options are also
+	  slightly simpler (compared to CIFS) due to protocol improvements.
+
+	  If you need to mount to Samba, Macs or Windows from this machine, say Y.
+
+config CIFS_STATS
+        bool "CIFS statistics"
+        depends on CIFS
+        help
+          Enabling this option will cause statistics for each server share
+	  mounted by the cifs client to be displayed in /proc/fs/cifs/Stats
+
+config CIFS_STATS2
+	bool "Extended statistics"
+	depends on CIFS_STATS
+	help
+	  Enabling this option will allow more detailed statistics on SMB
+	  request timing to be displayed in /proc/fs/cifs/DebugData and also
+	  allow optional logging of slow responses to dmesg (depending on the
+	  value of /proc/fs/cifs/cifsFYI, see fs/cifs/README for more details).
+	  These additional statistics may have a minor effect on performance
+	  and memory utilization.
+
+	  Unless you are a developer or are doing network performance analysis
+	  or tuning, say N.
+
+config CIFS_WEAK_PW_HASH
+	bool "Support legacy servers which use weaker LANMAN security"
+	depends on CIFS
+	help
+	  Modern CIFS servers including Samba and most Windows versions
+	  (since 1997) support stronger NTLM (and even NTLMv2 and Kerberos)
+	  security mechanisms. These hash the password more securely
+	  than the mechanisms used in the older LANMAN version of the
+	  SMB protocol but LANMAN based authentication is needed to
+	  establish sessions with some old SMB servers.
+
+	  Enabling this option allows the cifs module to mount to older
+	  LANMAN based servers such as OS/2 and Windows 95, but such
+	  mounts may be less secure than mounts using NTLM or more recent
+	  security mechanisms if you are on a public network.  Unless you
+	  have a need to access old SMB servers (and are on a private
+	  network) you probably want to say N.  Even if this support
+	  is enabled in the kernel build, LANMAN authentication will not be
+	  used automatically. At runtime LANMAN mounts are disabled but
+	  can be set to required (or optional) either in
+	  /proc/fs/cifs (see fs/cifs/README for more detail) or via an
+	  option on the mount command. This support is disabled by
+	  default in order to reduce the possibility of a downgrade
+	  attack.
+
+	  If unsure, say N.
+
+config CIFS_UPCALL
+	bool "Kerberos/SPNEGO advanced session setup"
+	depends on CIFS && KEYS
+	select DNS_RESOLVER
+	help
+	  Enables an upcall mechanism for CIFS which accesses userspace helper
+	  utilities to provide SPNEGO packaged (RFC 4178) Kerberos tickets
+	  which are needed to mount to certain secure servers (for which more
+	  secure Kerberos authentication is required). If unsure, say Y.
+
+config CIFS_XATTR
+        bool "CIFS extended attributes"
+        depends on CIFS
+        help
+          Extended attributes are name:value pairs associated with inodes by
+          the kernel or by users (see the attr(5) manual page, or visit
+          <http://acl.bestbits.at/> for details).  CIFS maps the name of
+          extended attributes beginning with the user namespace prefix
+          to SMB/CIFS EAs. EAs are stored on Windows servers without the
+          user namespace prefix, but their names are seen by Linux cifs clients
+          prefaced by the user namespace prefix. The system namespace
+          (used by some filesystems to store ACLs) is not supported at
+          this time.
+
+          If unsure, say Y.
+
+config CIFS_POSIX
+        bool "CIFS POSIX Extensions"
+        depends on CIFS_XATTR
+        help
+          Enabling this option will cause the cifs client to attempt to
+	  negotiate a newer dialect with servers, such as Samba 3.0.5
+	  or later, that optionally can handle more POSIX like (rather
+	  than Windows like) file behavior.  It also enables
+	  support for POSIX ACLs (getfacl and setfacl) to servers
+	  (such as Samba 3.10 and later) which can negotiate
+	  CIFS POSIX ACL support.  If unsure, say N.
+
+config CIFS_ACL
+	  bool "Provide CIFS ACL support"
+	  depends on CIFS_XATTR && KEYS
+	  help
+	    Allows fetching CIFS/NTFS ACL from the server.  The DACL blob
+	    is handed over to the application/caller.  See the man
+	    page for getcifsacl for more information.  If unsure, say Y.
+
+config CIFS_DEBUG
+	bool "Enable CIFS debugging routines"
+	default y
+	depends on CIFS
+	help
+	   Enabling this option adds helpful debugging messages to
+	   the cifs code which increases the size of the cifs module.
+	   If unsure, say Y.
+config CIFS_DEBUG2
+	bool "Enable additional CIFS debugging routines"
+	depends on CIFS_DEBUG
+	help
+	   Enabling this option adds a few more debugging routines
+	   to the cifs code which slightly increases the size of
+	   the cifs module and can cause additional logging of debug
+	   messages in some error paths, slowing performance. This
+	   option can be turned off unless you are debugging
+	   cifs problems.  If unsure, say N.
+
+config CIFS_DEBUG_DUMP_KEYS
+	bool "Dump encryption keys for offline decryption (Unsafe)"
+	depends on CIFS_DEBUG
+	help
+	   Enabling this will dump the encryption and decryption keys
+	   used to communicate on an encrypted share connection on the
+	   console. This allows Wireshark to decrypt and dissect
+	   encrypted network captures. Enable this carefully.
+	   If unsure, say N.
+
+config CIFS_DFS_UPCALL
+	  bool "DFS feature support"
+	  depends on CIFS && KEYS
+	  select DNS_RESOLVER
+	  help
+	    Distributed File System (DFS) support is used to access shares
+	    transparently in an enterprise name space, even if the share
+	    moves to a different server.  This feature also enables
+	    an upcall mechanism for CIFS which contacts userspace helper
+	    utilities to provide server name resolution (host names to
+	    IP addresses) which is needed for implicit mounts of DFS junction
+	    points. If unsure, say Y.
+
+config CIFS_NFSD_EXPORT
+	  bool "Allow nfsd to export CIFS file system"
+	  depends on CIFS && BROKEN
+	  help
+	   Allows NFS server to export a CIFS mounted share (nfsd over cifs)
+
+config CIFS_SMB311
+	bool "SMB3.1.1 network file system support (Experimental)"
+	depends on CIFS
+
+	help
+	  This enables experimental support for the newest, SMB3.1.1, dialect.
+	  This dialect includes improved security negotiation features.
+	  If unsure, say N
+
+config CIFS_FSCACHE
+	  bool "Provide CIFS client caching support"
+	  depends on CIFS=m && FSCACHE || CIFS=y && FSCACHE=y
+	  help
+	    Makes CIFS FS-Cache capable. Say Y here if you want your CIFS data
+	    to be cached locally on disk through the general filesystem cache
+	    manager. If unsure, say N.
+

sources/4.13/Makefile

+#
+# Makefile for Linux CIFS VFS client 
+#
+obj-$(CONFIG_CIFS) += etercifs.o
+
+etercifs-y := cifsfs.o cifssmb.o cifs_debug.o connect.o dir.o file.o inode.o \
+	  link.o misc.o netmisc.o smbencrypt.o transport.o asn1.o \
+	  cifs_unicode.o nterr.o cifsencrypt.o \
+	  readdir.o ioctl.o sess.o export.o smb1ops.o winucase.o \
+	  smb2ops.o smb2maperror.o smb2transport.o \
+	  smb2misc.o smb2pdu.o smb2inode.o smb2file.o
+
+etercifs-$(CONFIG_CIFS_XATTR) += xattr.o
+etercifs-$(CONFIG_CIFS_ACL) += cifsacl.o
+
+etercifs-$(CONFIG_CIFS_UPCALL) += cifs_spnego.o
+
+etercifs-$(CONFIG_CIFS_DFS_UPCALL) += dns_resolve.o cifs_dfs_ref.o
+
+etercifs-$(CONFIG_CIFS_FSCACHE) += fscache.o cache.o
+

sources/4.13/cache.c

+/*
+ *   fs/cifs/cache.c - CIFS filesystem cache index structure definitions
+ *
+ *   Copyright (c) 2010 Novell, Inc.
+ *   Authors(s): Suresh Jayaraman (sjayaraman@suse.de>
+ *
+ *   This library is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU Lesser General Public License as published
+ *   by the Free Software Foundation; either version 2.1 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This library is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ *   the GNU Lesser General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Lesser General Public License
+ *   along with this library; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#include "fscache.h"
+#include "cifs_debug.h"
+
+/*
+ * CIFS filesystem definition for FS-Cache
+ */
+struct fscache_netfs cifs_fscache_netfs = {
+	.name = "cifs",
+	.version = 0,
+};
+
+/*
+ * Register CIFS for caching with FS-Cache
+ */
+int cifs_fscache_register(void)
+{
+	return fscache_register_netfs(&cifs_fscache_netfs);
+}
+
+/*
+ * Unregister CIFS for caching
+ */
+void cifs_fscache_unregister(void)
+{
+	fscache_unregister_netfs(&cifs_fscache_netfs);
+}
+
+/*
+ * Key layout of CIFS server cache index object
+ */
+struct cifs_server_key {
+	uint16_t	family;		/* address family */
+	__be16		port;		/* IP port */
+	union {
+		struct in_addr	ipv4_addr;
+		struct in6_addr	ipv6_addr;
+	} addr[0];
+};
+
+/*
+ * Server object keyed by {IPaddress,port,family} tuple
+ */
+static uint16_t cifs_server_get_key(const void *cookie_netfs_data,
+				   void *buffer, uint16_t maxbuf)
+{
+	const struct TCP_Server_Info *server = cookie_netfs_data;
+	const struct sockaddr *sa = (struct sockaddr *) &server->dstaddr;
+	const struct sockaddr_in *addr = (struct sockaddr_in *) sa;
+	const struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *) sa;
+	struct cifs_server_key *key = buffer;
+	uint16_t key_len = sizeof(struct cifs_server_key);
+
+	memset(key, 0, key_len);
+
+	/*
+	 * Should not be a problem as sin_family/sin6_family overlays
+	 * sa_family field
+	 */
+	switch (sa->sa_family) {
+	case AF_INET:
+		key->family = sa->sa_family;
+		key->port = addr->sin_port;
+		key->addr[0].ipv4_addr = addr->sin_addr;
+		key_len += sizeof(key->addr[0].ipv4_addr);
+		break;
+
+	case AF_INET6:
+		key->family = sa->sa_family;
+		key->port = addr6->sin6_port;
+		key->addr[0].ipv6_addr = addr6->sin6_addr;
+		key_len += sizeof(key->addr[0].ipv6_addr);
+		break;
+
+	default:
+		cifs_dbg(VFS, "Unknown network family '%d'\n", sa->sa_family);
+		key_len = 0;
+		break;
+	}
+
+	return key_len;
+}
+
+/*
+ * Server object for FS-Cache
+ */
+const struct fscache_cookie_def cifs_fscache_server_index_def = {
+	.name = "CIFS.server",
+	.type = FSCACHE_COOKIE_TYPE_INDEX,
+	.get_key = cifs_server_get_key,
+};
+
+/*
+ * Auxiliary data attached to CIFS superblock within the cache
+ */
+struct cifs_fscache_super_auxdata {
+	u64	resource_id;		/* unique server resource id */
+};
+
+static char *extract_sharename(const char *treename)
+{
+	const char *src;
+	char *delim, *dst;
+	int len;
+
+	/* skip double chars at the beginning */
+	src = treename + 2;
+
+	/* share name is always preceded by '\\' now */
+	delim = strchr(src, '\\');
+	if (!delim)
+		return ERR_PTR(-EINVAL);
+	delim++;
+	len = strlen(delim);
+
+	/* caller has to free the memory */
+	dst = kstrndup(delim, len, GFP_KERNEL);
+	if (!dst)
+		return ERR_PTR(-ENOMEM);
+
+	return dst;
+}
+
+/*
+ * Superblock object currently keyed by share name
+ */
+static uint16_t cifs_super_get_key(const void *cookie_netfs_data, void *buffer,
+				   uint16_t maxbuf)
+{
+	const struct cifs_tcon *tcon = cookie_netfs_data;
+	char *sharename;
+	uint16_t len;
+
+	sharename = extract_sharename(tcon->treeName);
+	if (IS_ERR(sharename)) {
+		cifs_dbg(FYI, "%s: couldn't extract sharename\n", __func__);
+		sharename = NULL;
+		return 0;
+	}
+
+	len = strlen(sharename);
+	if (len > maxbuf)
+		return 0;
+
+	memcpy(buffer, sharename, len);
+
+	kfree(sharename);
+
+	return len;
+}
+
+static uint16_t
+cifs_fscache_super_get_aux(const void *cookie_netfs_data, void *buffer,
+			   uint16_t maxbuf)
+{
+	struct cifs_fscache_super_auxdata auxdata;
+	const struct cifs_tcon *tcon = cookie_netfs_data;
+
+	memset(&auxdata, 0, sizeof(auxdata));
+	auxdata.resource_id = tcon->resource_id;
+
+	if (maxbuf > sizeof(auxdata))
+		maxbuf = sizeof(auxdata);
+
+	memcpy(buffer, &auxdata, maxbuf);
+
+	return maxbuf;
+}
+
+static enum
+fscache_checkaux cifs_fscache_super_check_aux(void *cookie_netfs_data,
+					      const void *data,
+					      uint16_t datalen)
+{
+	struct cifs_fscache_super_auxdata auxdata;
+	const struct cifs_tcon *tcon = cookie_netfs_data;
+
+	if (datalen != sizeof(auxdata))
+		return FSCACHE_CHECKAUX_OBSOLETE;
+
+	memset(&auxdata, 0, sizeof(auxdata));
+	auxdata.resource_id = tcon->resource_id;
+
+	if (memcmp(data, &auxdata, datalen) != 0)
+		return FSCACHE_CHECKAUX_OBSOLETE;
+
+	return FSCACHE_CHECKAUX_OKAY;
+}
+
+/*
+ * Superblock object for FS-Cache
+ */
+const struct fscache_cookie_def cifs_fscache_super_index_def = {
+	.name = "CIFS.super",
+	.type = FSCACHE_COOKIE_TYPE_INDEX,
+	.get_key = cifs_super_get_key,
+	.get_aux = cifs_fscache_super_get_aux,
+	.check_aux = cifs_fscache_super_check_aux,
+};
+
+/*
+ * Auxiliary data attached to CIFS inode within the cache
+ */
+struct cifs_fscache_inode_auxdata {
+	struct timespec	last_write_time;
+	struct timespec	last_change_time;
+	u64		eof;
+};
+
+static uint16_t cifs_fscache_inode_get_key(const void *cookie_netfs_data,
+					   void *buffer, uint16_t maxbuf)
+{
+	const struct cifsInodeInfo *cifsi = cookie_netfs_data;
+	uint16_t keylen;
+
+	/* use the UniqueId as the key */
+	keylen = sizeof(cifsi->uniqueid);
+	if (keylen > maxbuf)
+		keylen = 0;
+	else
+		memcpy(buffer, &cifsi->uniqueid, keylen);
+
+	return keylen;
+}
+
+static void
+cifs_fscache_inode_get_attr(const void *cookie_netfs_data, uint64_t *size)
+{
+	const struct cifsInodeInfo *cifsi = cookie_netfs_data;
+
+	*size = cifsi->vfs_inode.i_size;
+}
+
+static uint16_t
+cifs_fscache_inode_get_aux(const void *cookie_netfs_data, void *buffer,
+			   uint16_t maxbuf)
+{
+	struct cifs_fscache_inode_auxdata auxdata;
+	const struct cifsInodeInfo *cifsi = cookie_netfs_data;
+
+	memset(&auxdata, 0, sizeof(auxdata));
+	auxdata.eof = cifsi->server_eof;
+	auxdata.last_write_time = cifsi->vfs_inode.i_mtime;
+	auxdata.last_change_time = cifsi->vfs_inode.i_ctime;
+
+	if (maxbuf > sizeof(auxdata))
+		maxbuf = sizeof(auxdata);
+
+	memcpy(buffer, &auxdata, maxbuf);
+
+	return maxbuf;
+}
+
+static enum
+fscache_checkaux cifs_fscache_inode_check_aux(void *cookie_netfs_data,
+					      const void *data,
+					      uint16_t datalen)
+{
+	struct cifs_fscache_inode_auxdata auxdata;
+	struct cifsInodeInfo *cifsi = cookie_netfs_data;
+
+	if (datalen != sizeof(auxdata))
+		return FSCACHE_CHECKAUX_OBSOLETE;
+
+	memset(&auxdata, 0, sizeof(auxdata));
+	auxdata.eof = cifsi->server_eof;
+	auxdata.last_write_time = cifsi->vfs_inode.i_mtime;
+	auxdata.last_change_time = cifsi->vfs_inode.i_ctime;
+
+	if (memcmp(data, &auxdata, datalen) != 0)
+		return FSCACHE_CHECKAUX_OBSOLETE;
+
+	return FSCACHE_CHECKAUX_OKAY;
+}
+
+static void cifs_fscache_inode_now_uncached(void *cookie_netfs_data)
+{
+	struct cifsInodeInfo *cifsi = cookie_netfs_data;
+	struct pagevec pvec;
+	pgoff_t first;
+	int loop, nr_pages;
+
+	pagevec_init(&pvec, 0);
+	first = 0;
+
+	cifs_dbg(FYI, "%s: cifs inode 0x%p now uncached\n", __func__, cifsi);
+
+	for (;;) {
+		nr_pages = pagevec_lookup(&pvec,
+					  cifsi->vfs_inode.i_mapping, first,
+					  PAGEVEC_SIZE - pagevec_count(&pvec));
+		if (!nr_pages)
+			break;
+
+		for (loop = 0; loop < nr_pages; loop++)
+			ClearPageFsCache(pvec.pages[loop]);
+
+		first = pvec.pages[nr_pages - 1]->index + 1;
+
+		pvec.nr = nr_pages;
+		pagevec_release(&pvec);
+		cond_resched();
+	}
+}
+
+const struct fscache_cookie_def cifs_fscache_inode_object_def = {
+	.name		= "CIFS.uniqueid",
+	.type		= FSCACHE_COOKIE_TYPE_DATAFILE,
+	.get_key	= cifs_fscache_inode_get_key,
+	.get_attr	= cifs_fscache_inode_get_attr,
+	.get_aux	= cifs_fscache_inode_get_aux,
+	.check_aux	= cifs_fscache_inode_check_aux,
+	.now_uncached	= cifs_fscache_inode_now_uncached,
+};

sources/4.13/cifs_debug.h

+/*
+ *
+ *   Copyright (c) International Business Machines  Corp., 2000,2002
+ *   Modified by Steve French (sfrench@us.ibm.com)
+ *
+ *   This program is free software;  you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ *   the GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program;  if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+*/
+
+#ifndef _H_CIFS_DEBUG
+#define _H_CIFS_DEBUG
+
+void cifs_dump_mem(char *label, void *data, int length);
+void cifs_dump_detail(void *);
+void cifs_dump_mids(struct TCP_Server_Info *);
+extern bool traceSMB;		/* flag which enables the function below */
+void dump_smb(void *, int);
+#define CIFS_INFO	0x01
+#define CIFS_RC		0x02
+#define CIFS_TIMER	0x04
+
+#define VFS 1
+#define FYI 2
+extern int cifsFYI;
+#ifdef CONFIG_CIFS_DEBUG2
+#define NOISY 4
+#else
+#define NOISY 0
+#endif
+
+/*
+ *	debug ON
+ *	--------
+ */
+#ifdef CONFIG_CIFS_DEBUG
+
+__printf(1, 2) void cifs_vfs_err(const char *fmt, ...);
+
+/* information message: e.g., configuration, major event */
+#define cifs_dbg(type, fmt, ...)					\
+do {									\
+	if (type == FYI && cifsFYI & CIFS_INFO) {			\
+		pr_debug_ratelimited("%s: "				\
+			    fmt, __FILE__, ##__VA_ARGS__);		\
+	} else if (type == VFS) {					\
+		cifs_vfs_err(fmt, ##__VA_ARGS__);			\
+	} else if (type == NOISY && type != 0) {			\
+		pr_debug_ratelimited(fmt, ##__VA_ARGS__);		\
+	}								\
+} while (0)
+
+/*
+ *	debug OFF
+ *	---------
+ */
+#else		/* _CIFS_DEBUG */
+#define cifs_dbg(type, fmt, ...)					\
+do {									\
+	if (0)								\
+		pr_debug(fmt, ##__VA_ARGS__);				\
+} while (0)
+#endif
+
+#endif				/* _H_CIFS_DEBUG */

sources/4.13/cifs_fs_sb.h

+/*
+ *   fs/cifs/cifs_fs_sb.h
+ *
+ *   Copyright (c) International Business Machines  Corp., 2002,2004
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ *   This library is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU Lesser General Public License as published
+ *   by the Free Software Foundation; either version 2.1 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This library is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ *   the GNU Lesser General Public License for more details.
+ *
+ */
+#include <linux/rbtree.h>
+
+#ifndef _CIFS_FS_SB_H
+#define _CIFS_FS_SB_H
+
+#include <linux/backing-dev.h>
+
+#define CIFS_MOUNT_NO_PERM      1 /* do not do client vfs_perm check */
+#define CIFS_MOUNT_SET_UID      2 /* set current's euid in create etc. */
+#define CIFS_MOUNT_SERVER_INUM  4 /* inode numbers from uniqueid from server  */
+#define CIFS_MOUNT_DIRECT_IO    8 /* do not write nor read through page cache */
+#define CIFS_MOUNT_NO_XATTR     0x10  /* if set - disable xattr support       */
+#define CIFS_MOUNT_MAP_SPECIAL_CHR 0x20 /* remap illegal chars in filenames   */
+#define CIFS_MOUNT_POSIX_PATHS  0x40  /* Negotiate posix pathnames if possible*/
+#define CIFS_MOUNT_UNX_EMUL     0x80  /* Network compat with SFUnix emulation */
+#define CIFS_MOUNT_NO_BRL       0x100 /* No sending byte range locks to srv   */
+#define CIFS_MOUNT_CIFS_ACL     0x200 /* send ACL requests to non-POSIX srv   */
+#define CIFS_MOUNT_OVERR_UID    0x400 /* override uid returned from server    */
+#define CIFS_MOUNT_OVERR_GID    0x800 /* override gid returned from server    */
+#define CIFS_MOUNT_DYNPERM      0x1000 /* allow in-memory only mode setting   */
+#define CIFS_MOUNT_NOPOSIXBRL   0x2000 /* mandatory not posix byte range lock */
+#define CIFS_MOUNT_NOSSYNC      0x4000 /* don't do slow SMBflush on every sync*/
+#define CIFS_MOUNT_FSCACHE	0x8000 /* local caching enabled */
+#define CIFS_MOUNT_MF_SYMLINKS	0x10000 /* Minshall+French Symlinks enabled */
+#define CIFS_MOUNT_MULTIUSER	0x20000 /* multiuser mount */
+#define CIFS_MOUNT_STRICT_IO	0x40000 /* strict cache mode */
+#define CIFS_MOUNT_RWPIDFORWARD	0x80000 /* use pid forwarding for rw */
+#define CIFS_MOUNT_POSIXACL	0x100000 /* mirror of MS_POSIXACL in mnt_cifs_flags */
+#define CIFS_MOUNT_CIFS_BACKUPUID 0x200000 /* backup intent bit for a user */
+#define CIFS_MOUNT_CIFS_BACKUPGID 0x400000 /* backup intent bit for a group */
+#define CIFS_MOUNT_MAP_SFM_CHR	0x800000 /* SFM/MAC mapping for illegal chars */
+#define CIFS_MOUNT_USE_PREFIX_PATH 0x1000000 /* make subpath with unaccessible
+					      * root mountable
+					      */
+#define CIFS_MOUNT_UID_FROM_ACL 0x2000000 /* try to get UID via special SID */
+
+struct cifs_sb_info {
+	struct rb_root tlink_tree;
+	spinlock_t tlink_tree_lock;
+	struct tcon_link *master_tlink;
+	struct nls_table *local_nls;
+	unsigned int rsize;
+	unsigned int wsize;
+	unsigned long actimeo; /* attribute cache timeout (jiffies) */
+	atomic_t active;
+	kuid_t	mnt_uid;
+	kgid_t	mnt_gid;
+	kuid_t	mnt_backupuid;
+	kgid_t	mnt_backupgid;
+	umode_t	mnt_file_mode;
+	umode_t	mnt_dir_mode;
+	unsigned int mnt_cifs_flags;
+	char   *mountdata; /* options received at mount time or via DFS refs */
+	struct delayed_work prune_tlinks;
+	struct rcu_head rcu;
+	char *prepath;
+};
+#endif				/* _CIFS_FS_SB_H */

sources/4.13/cifs_ioctl.h

+/*
+ *   fs/cifs/cifs_ioctl.h
+ *
+ *   Structure definitions for io control for cifs/smb3
+ *
+ *   Copyright (c) 2015 Steve French <steve.french@primarydata.com>
+ *
+ *   This library is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU Lesser General Public License as published
+ *   by the Free Software Foundation; either version 2.1 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This library is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ *   the GNU Lesser General Public License for more details.
+ *
+ */
+
+struct smb_mnt_fs_info {
+	__u32	version; /* 0001 */
+	__u16	protocol_id;
+	__u16	tcon_flags;
+	__u32	vol_serial_number;
+	__u32	vol_create_time;
+	__u32	share_caps;
+	__u32	share_flags;
+	__u32	sector_flags;
+	__u32	optimal_sector_size;
+	__u32	max_bytes_chunk;
+	__u32	fs_attributes;
+	__u32	max_path_component;
+	__u32	device_type;
+	__u32	device_characteristics;
+	__u32	maximal_access;
+	__u64   cifs_posix_caps;
+} __packed;
+
+struct smb_snapshot_array {
+	__u32	number_of_snapshots;
+	__u32	number_of_snapshots_returned;
+	__u32	snapshot_array_size;
+	/*	snapshots[]; */
+} __packed;
+
+#define CIFS_IOCTL_MAGIC	0xCF
+#define CIFS_IOC_COPYCHUNK_FILE	_IOW(CIFS_IOCTL_MAGIC, 3, int)
+#define CIFS_IOC_SET_INTEGRITY  _IO(CIFS_IOCTL_MAGIC, 4)
+#define CIFS_IOC_GET_MNT_INFO _IOR(CIFS_IOCTL_MAGIC, 5, struct smb_mnt_fs_info)
+#define CIFS_ENUMERATE_SNAPSHOTS _IOR(CIFS_IOCTL_MAGIC, 6, struct smb_snapshot_array)

sources/4.13/cifs_spnego.c

+/*
+ *   fs/cifs/cifs_spnego.c -- SPNEGO upcall management for CIFS
+ *
+ *   Copyright (c) 2007 Red Hat, Inc.
+ *   Author(s): Jeff Layton (jlayton@redhat.com)
+ *
+ *   This library is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU Lesser General Public License as published
+ *   by the Free Software Foundation; either version 2.1 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This library is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ *   the GNU Lesser General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Lesser General Public License
+ *   along with this library; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/list.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <keys/user-type.h>
+#include <linux/key-type.h>
+#include <linux/keyctl.h>
+#include <linux/inet.h>
+#include "cifsglob.h"
+#include "cifs_spnego.h"
+#include "cifs_debug.h"
+#include "cifsproto.h"
+static const struct cred *spnego_cred;
+
+/* create a new cifs key */
+static int
+cifs_spnego_key_instantiate(struct key *key, struct key_preparsed_payload *prep)
+{
+	char *payload;
+	int ret;
+
+	ret = -ENOMEM;
+	payload = kmemdup(prep->data, prep->datalen, GFP_KERNEL);
+	if (!payload)
+		goto error;
+
+	/* attach the data */
+	key->payload.data[0] = payload;
+	ret = 0;
+
+error:
+	return ret;
+}
+
+static void
+cifs_spnego_key_destroy(struct key *key)
+{
+	kfree(key->payload.data[0]);
+}
+
+
+/*
+ * keytype for CIFS spnego keys
+ */
+struct key_type cifs_spnego_key_type = {
+	.name		= "cifs.spnego",
+	.instantiate	= cifs_spnego_key_instantiate,
+	.destroy	= cifs_spnego_key_destroy,
+	.describe	= user_describe,
+};
+
+/* length of longest version string e.g.  strlen("ver=0xFF") */
+#define MAX_VER_STR_LEN		8
+
+/* length of longest security mechanism name, eg in future could have
+ * strlen(";sec=ntlmsspi") */
+#define MAX_MECH_STR_LEN	13
+
+/* strlen of "host=" */
+#define HOST_KEY_LEN		5
+
+/* strlen of ";ip4=" or ";ip6=" */
+#define IP_KEY_LEN		5
+
+/* strlen of ";uid=0x" */
+#define UID_KEY_LEN		7
+
+/* strlen of ";creduid=0x" */
+#define CREDUID_KEY_LEN		11
+
+/* strlen of ";user=" */
+#define USER_KEY_LEN		6
+
+/* strlen of ";pid=0x" */
+#define PID_KEY_LEN		7
+
+/* get a key struct with a SPNEGO security blob, suitable for session setup */
+struct key *
+cifs_get_spnego_key(struct cifs_ses *sesInfo)
+{
+	struct TCP_Server_Info *server = sesInfo->server;
+	struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr;
+	struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr;
+	char *description, *dp;
+	size_t desc_len;
+	struct key *spnego_key;
+	const char *hostname = server->hostname;
+	const struct cred *saved_cred;
+
+	/* length of fields (with semicolons): ver=0xyz ip4=ipaddress
+	   host=hostname sec=mechanism uid=0xFF user=username */
+	desc_len = MAX_VER_STR_LEN +
+		   HOST_KEY_LEN + strlen(hostname) +
+		   IP_KEY_LEN + INET6_ADDRSTRLEN +
+		   MAX_MECH_STR_LEN +
+		   UID_KEY_LEN + (sizeof(uid_t) * 2) +
+		   CREDUID_KEY_LEN + (sizeof(uid_t) * 2) +
+		   PID_KEY_LEN + (sizeof(pid_t) * 2) + 1;
+
+	if (sesInfo->user_name)
+		desc_len += USER_KEY_LEN + strlen(sesInfo->user_name);
+
+	spnego_key = ERR_PTR(-ENOMEM);
+	description = kzalloc(desc_len, GFP_KERNEL);
+	if (description == NULL)
+		goto out;
+
+	dp = description;
+	/* start with version and hostname portion of UNC string */
+	spnego_key = ERR_PTR(-EINVAL);
+	sprintf(dp, "ver=0x%x;host=%s;", CIFS_SPNEGO_UPCALL_VERSION,
+		hostname);
+	dp = description + strlen(description);
+
+	/* add the server address */
+	if (server->dstaddr.ss_family == AF_INET)
+		sprintf(dp, "ip4=%pI4", &sa->sin_addr);
+	else if (server->dstaddr.ss_family == AF_INET6)
+		sprintf(dp, "ip6=%pI6", &sa6->sin6_addr);
+	else
+		goto out;
+
+	dp = description + strlen(description);
+
+	/* for now, only sec=krb5 and sec=mskrb5 are valid */
+	if (server->sec_kerberos)
+		sprintf(dp, ";sec=krb5");
+	else if (server->sec_mskerberos)
+		sprintf(dp, ";sec=mskrb5");
+	else
+		goto out;
+
+	dp = description + strlen(description);
+	sprintf(dp, ";uid=0x%x",
+		from_kuid_munged(&init_user_ns, sesInfo->linux_uid));
+
+	dp = description + strlen(description);
+	sprintf(dp, ";creduid=0x%x",
+		from_kuid_munged(&init_user_ns, sesInfo->cred_uid));
+
+	if (sesInfo->user_name) {
+		dp = description + strlen(description);
+		sprintf(dp, ";user=%s", sesInfo->user_name);
+	}
+
+	dp = description + strlen(description);
+	sprintf(dp, ";pid=0x%x", current->pid);
+
+	cifs_dbg(FYI, "key description = %s\n", description);
+	saved_cred = override_creds(spnego_cred);
+	spnego_key = request_key(&cifs_spnego_key_type, description, "");
+	revert_creds(saved_cred);
+
+#ifdef CONFIG_CIFS_DEBUG2
+	if (cifsFYI && !IS_ERR(spnego_key)) {
+		struct cifs_spnego_msg *msg = spnego_key->payload.data[0];
+		cifs_dump_mem("SPNEGO reply blob:", msg->data, min(1024U,
+				msg->secblob_len + msg->sesskey_len));
+	}
+#endif /* CONFIG_CIFS_DEBUG2 */
+
+out:
+	kfree(description);
+	return spnego_key;
+}
+
+int
+init_cifs_spnego(void)
+{
+	struct cred *cred;
+	struct key *keyring;
+	int ret;
+
+	cifs_dbg(FYI, "Registering the %s key type\n",
+		 cifs_spnego_key_type.name);
+
+	/*
+	 * Create an override credential set with special thread keyring for
+	 * spnego upcalls.
+	 */
+
+	cred = prepare_kernel_cred(NULL);
+	if (!cred)
+		return -ENOMEM;
+
+	keyring = keyring_alloc(".cifs_spnego",
+				GLOBAL_ROOT_UID, GLOBAL_ROOT_GID, cred,
+				(KEY_POS_ALL & ~KEY_POS_SETATTR) |
+				KEY_USR_VIEW | KEY_USR_READ,
+				KEY_ALLOC_NOT_IN_QUOTA, NULL, NULL);
+	if (IS_ERR(keyring)) {
+		ret = PTR_ERR(keyring);
+		goto failed_put_cred;
+	}
+
+	ret = register_key_type(&cifs_spnego_key_type);
+	if (ret < 0)
+		goto failed_put_key;
+
+	/*
+	 * instruct request_key() to use this special keyring as a cache for
+	 * the results it looks up
+	 */
+	set_bit(KEY_FLAG_ROOT_CAN_CLEAR, &keyring->flags);
+	cred->thread_keyring = keyring;
+	cred->jit_keyring = KEY_REQKEY_DEFL_THREAD_KEYRING;
+	spnego_cred = cred;
+
+	cifs_dbg(FYI, "cifs spnego keyring: %d\n", key_serial(keyring));
+	return 0;
+
+failed_put_key:
+	key_put(keyring);
+failed_put_cred:
+	put_cred(cred);
+	return ret;
+}
+
+void
+exit_cifs_spnego(void)
+{
+	key_revoke(spnego_cred->thread_keyring);
+	unregister_key_type(&cifs_spnego_key_type);
+	put_cred(spnego_cred);
+	cifs_dbg(FYI, "Unregistered %s key type\n", cifs_spnego_key_type.name);
+}

sources/4.13/cifs_spnego.h

+/*
+ *   fs/cifs/cifs_spnego.h -- SPNEGO upcall management for CIFS
+ *
+ *   Copyright (c) 2007 Red Hat, Inc.
+ *   Author(s): Jeff Layton (jlayton@redhat.com)
+ *              Steve French (sfrench@us.ibm.com)
+ *
+ *   This library is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU Lesser General Public License as published
+ *   by the Free Software Foundation; either version 2.1 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This library is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ *   the GNU Lesser General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Lesser General Public License
+ *   along with this library; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef _CIFS_SPNEGO_H
+#define _CIFS_SPNEGO_H
+
+#define CIFS_SPNEGO_UPCALL_VERSION 2
+
+/*
+ * The version field should always be set to CIFS_SPNEGO_UPCALL_VERSION.
+ * The flags field is for future use. The request-key callout should set
+ * sesskey_len and secblob_len, and then concatenate the SessKey+SecBlob
+ * and stuff it in the data field.
+ */
+struct cifs_spnego_msg {
+	uint32_t	version;
+	uint32_t	flags;
+	uint32_t	sesskey_len;
+	uint32_t	secblob_len;
+	uint8_t		data[1];
+};
+
+#ifdef __KERNEL__
+extern struct key_type cifs_spnego_key_type;
+extern struct key *cifs_get_spnego_key(struct cifs_ses *sesInfo);
+#endif /* KERNEL */
+
+#endif /* _CIFS_SPNEGO_H */

sources/4.13/cifsacl.h

+/*
+ *   fs/cifs/cifsacl.h
+ *
+ *   Copyright (c) International Business Machines  Corp., 2007
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ *   This library is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU Lesser General Public License as published
+ *   by the Free Software Foundation; either version 2.1 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This library is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ *   the GNU Lesser General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Lesser General Public License
+ *   along with this library; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef _CIFSACL_H
+#define _CIFSACL_H
+
+
+#define NUM_AUTHS (6)	/* number of authority fields */
+#define SID_MAX_SUB_AUTHORITIES (15) /* max number of sub authority fields */
+
+#define READ_BIT        0x4
+#define WRITE_BIT       0x2
+#define EXEC_BIT        0x1
+
+#define UBITSHIFT	6
+#define GBITSHIFT	3
+
+#define ACCESS_ALLOWED	0
+#define ACCESS_DENIED	1
+
+#define SIDOWNER 1
+#define SIDGROUP 2
+
+/*
+ * Security Descriptor length containing DACL with 3 ACEs (one each for
+ * owner, group and world).
+ */
+#define DEFAULT_SEC_DESC_LEN (sizeof(struct cifs_ntsd) + \
+			      sizeof(struct cifs_acl) + \
+			      (sizeof(struct cifs_ace) * 3))
+
+/*
+ * Maximum size of a string representation of a SID:
+ *
+ * The fields are unsigned values in decimal. So:
+ *
+ * u8:  max 3 bytes in decimal
+ * u32: max 10 bytes in decimal
+ *
+ * "S-" + 3 bytes for version field + 15 for authority field + NULL terminator
+ *
+ * For authority field, max is when all 6 values are non-zero and it must be
+ * represented in hex. So "-0x" + 12 hex digits.
+ *
+ * Add 11 bytes for each subauthority field (10 bytes each + 1 for '-')
+ */
+#define SID_STRING_BASE_SIZE (2 + 3 + 15 + 1)
+#define SID_STRING_SUBAUTH_SIZE (11) /* size of a single subauth string */
+
+struct cifs_ntsd {
+	__le16 revision; /* revision level */
+	__le16 type;
+	__le32 osidoffset;
+	__le32 gsidoffset;
+	__le32 sacloffset;
+	__le32 dacloffset;
+} __attribute__((packed));
+
+struct cifs_sid {
+	__u8 revision; /* revision level */
+	__u8 num_subauth;
+	__u8 authority[NUM_AUTHS];
+	__le32 sub_auth[SID_MAX_SUB_AUTHORITIES]; /* sub_auth[num_subauth] */
+} __attribute__((packed));
+
+/* size of a struct cifs_sid, sans sub_auth array */
+#define CIFS_SID_BASE_SIZE (1 + 1 + NUM_AUTHS)
+
+struct cifs_acl {
+	__le16 revision; /* revision level */
+	__le16 size;
+	__le32 num_aces;
+} __attribute__((packed));
+
+struct cifs_ace {
+	__u8 type;
+	__u8 flags;
+	__le16 size;
+	__le32 access_req;
+	struct cifs_sid sid; /* ie UUID of user or group who gets these perms */
+} __attribute__((packed));
+
+#endif /* _CIFSACL_H */

sources/4.13/cifsfs.h

+/*
+ *   fs/cifs/cifsfs.h
+ *
+ *   Copyright (c) International Business Machines  Corp., 2002, 2007
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ *   This library is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU Lesser General Public License as published
+ *   by the Free Software Foundation; either version 2.1 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This library is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ *   the GNU Lesser General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Lesser General Public License
+ *   along with this library; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef _CIFSFS_H
+#define _CIFSFS_H
+
+#include <linux/hash.h>
+
+#define ROOT_I 2
+
+/*
+ * ino_t is 32-bits on 32-bit arch. We have to squash the 64-bit value down
+ * so that it will fit. We use hash_64 to convert the value to 31 bits, and
+ * then add 1, to ensure that we don't end up with a 0 as the value.
+ */
+static inline ino_t
+cifs_uniqueid_to_ino_t(u64 fileid)
+{
+	if ((sizeof(ino_t)) < (sizeof(u64)))
+		return (ino_t)hash_64(fileid, (sizeof(ino_t) * 8) - 1) + 1;
+
+	return (ino_t)fileid;
+
+}
+
+static inline void cifs_set_time(struct dentry *dentry, unsigned long time)
+{
+	dentry->d_fsdata = (void *) time;
+}
+
+static inline unsigned long cifs_get_time(struct dentry *dentry)
+{
+	return (unsigned long) dentry->d_fsdata;
+}
+
+extern struct file_system_type cifs_fs_type;
+extern const struct address_space_operations cifs_addr_ops;
+extern const struct address_space_operations cifs_addr_ops_smallbuf;
+
+/* Functions related to super block operations */
+extern void cifs_sb_active(struct super_block *sb);
+extern void cifs_sb_deactive(struct super_block *sb);
+
+/* Functions related to inodes */
+extern const struct inode_operations cifs_dir_inode_ops;
+extern struct inode *cifs_root_iget(struct super_block *);
+extern int cifs_create(struct inode *, struct dentry *, umode_t,
+		       bool excl);
+extern int cifs_atomic_open(struct inode *, struct dentry *,
+			    struct file *, unsigned, umode_t,
+			    int *);
+extern struct dentry *cifs_lookup(struct inode *, struct dentry *,
+				  unsigned int);
+extern int cifs_unlink(struct inode *dir, struct dentry *dentry);
+extern int cifs_hardlink(struct dentry *, struct inode *, struct dentry *);
+extern int cifs_mknod(struct inode *, struct dentry *, umode_t, dev_t);
+extern int cifs_mkdir(struct inode *, struct dentry *, umode_t);
+extern int cifs_rmdir(struct inode *, struct dentry *);
+extern int cifs_rename2(struct inode *, struct dentry *, struct inode *,
+			struct dentry *, unsigned int);
+extern int cifs_revalidate_file_attr(struct file *filp);
+extern int cifs_revalidate_dentry_attr(struct dentry *);
+extern int cifs_revalidate_file(struct file *filp);
+extern int cifs_revalidate_dentry(struct dentry *);
+extern int cifs_invalidate_mapping(struct inode *inode);
+extern int cifs_revalidate_mapping(struct inode *inode);
+extern int cifs_zap_mapping(struct inode *inode);
+extern int cifs_getattr(const struct path *, struct kstat *, u32, unsigned int);
+extern int cifs_setattr(struct dentry *, struct iattr *);
+
+extern const struct inode_operations cifs_file_inode_ops;
+extern const struct inode_operations cifs_symlink_inode_ops;
+extern const struct inode_operations cifs_dfs_referral_inode_operations;
+
+
+/* Functions related to files and directories */
+extern const struct file_operations cifs_file_ops;
+extern const struct file_operations cifs_file_direct_ops; /* if directio mnt */
+extern const struct file_operations cifs_file_strict_ops; /* if strictio mnt */
+extern const struct file_operations cifs_file_nobrl_ops; /* no brlocks */
+extern const struct file_operations cifs_file_direct_nobrl_ops;
+extern const struct file_operations cifs_file_strict_nobrl_ops;
+extern int cifs_open(struct inode *inode, struct file *file);
+extern int cifs_close(struct inode *inode, struct file *file);
+extern int cifs_closedir(struct inode *inode, struct file *file);
+extern ssize_t cifs_user_readv(struct kiocb *iocb, struct iov_iter *to);
+extern ssize_t cifs_strict_readv(struct kiocb *iocb, struct iov_iter *to);
+extern ssize_t cifs_user_writev(struct kiocb *iocb, struct iov_iter *from);
+extern ssize_t cifs_strict_writev(struct kiocb *iocb, struct iov_iter *from);
+extern int cifs_lock(struct file *, int, struct file_lock *);
+extern int cifs_fsync(struct file *, loff_t, loff_t, int);
+extern int cifs_strict_fsync(struct file *, loff_t, loff_t, int);
+extern int cifs_flush(struct file *, fl_owner_t id);
+extern int cifs_file_mmap(struct file * , struct vm_area_struct *);
+extern int cifs_file_strict_mmap(struct file * , struct vm_area_struct *);
+extern const struct file_operations cifs_dir_ops;
+extern int cifs_dir_open(struct inode *inode, struct file *file);
+extern int cifs_readdir(struct file *file, struct dir_context *ctx);
+
+/* Functions related to dir entries */
+extern const struct dentry_operations cifs_dentry_ops;
+extern const struct dentry_operations cifs_ci_dentry_ops;
+
+#ifdef CONFIG_CIFS_DFS_UPCALL
+extern struct vfsmount *cifs_dfs_d_automount(struct path *path);
+#else
+#define cifs_dfs_d_automount NULL
+#endif
+
+/* Functions related to symlinks */
+extern const char *cifs_get_link(struct dentry *, struct inode *,
+			struct delayed_call *);
+extern int cifs_symlink(struct inode *inode, struct dentry *direntry,
+			const char *symname);
+
+#ifdef CONFIG_CIFS_XATTR
+extern const struct xattr_handler *cifs_xattr_handlers[];
+extern ssize_t	cifs_listxattr(struct dentry *, char *, size_t);
+#else
+# define cifs_xattr_handlers NULL
+# define cifs_listxattr NULL
+#endif
+
+extern ssize_t cifs_file_copychunk_range(unsigned int xid,
+					struct file *src_file, loff_t off,
+					struct file *dst_file, loff_t destoff,
+					size_t len, unsigned int flags);
+
+extern long cifs_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
+#ifdef CONFIG_CIFS_NFSD_EXPORT
+extern const struct export_operations cifs_export_ops;
+#endif /* CONFIG_CIFS_NFSD_EXPORT */
+
+#define CIFS_VERSION   "2.09"
+#endif				/* _CIFSFS_H */

sources/4.13/dns_resolve.c

+/*
+ *  fs/cifs/dns_resolve.c
+ *
+ *   Copyright (c) 2007 Igor Mammedov
+ *   Author(s): Igor Mammedov (niallain@gmail.com)
+ *              Steve French (sfrench@us.ibm.com)
+ *              Wang Lei (wang840925@gmail.com)
+ *		David Howells (dhowells@redhat.com)
+ *
+ *   Contains the CIFS DFS upcall routines used for hostname to
+ *   IP address translation.
+ *
+ *   This library is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU Lesser General Public License as published
+ *   by the Free Software Foundation; either version 2.1 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This library is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ *   the GNU Lesser General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Lesser General Public License
+ *   along with this library; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/slab.h>
+#include <linux/dns_resolver.h>
+#include "dns_resolve.h"
+#include "cifsglob.h"
+#include "cifsproto.h"
+#include "cifs_debug.h"
+
+/**
+ * dns_resolve_server_name_to_ip - Resolve UNC server name to ip address.
+ * @unc: UNC path specifying the server (with '/' as delimiter)
+ * @ip_addr: Where to return the IP address.
+ *
+ * The IP address will be returned in string form, and the caller is
+ * responsible for freeing it.
+ *
+ * Returns length of result on success, -ve on error.
+ */
+int
+dns_resolve_server_name_to_ip(const char *unc, char **ip_addr)
+{
+	struct sockaddr_storage ss;
+	const char *hostname, *sep;
+	char *name;
+	int len, rc;
+
+	if (!ip_addr || !unc)
+		return -EINVAL;
+
+	len = strlen(unc);
+	if (len < 3) {
+		cifs_dbg(FYI, "%s: unc is too short: %s\n", __func__, unc);
+		return -EINVAL;
+	}
+
+	/* Discount leading slashes for cifs */
+	len -= 2;
+	hostname = unc + 2;
+
+	/* Search for server name delimiter */
+	sep = memchr(hostname, '/', len);
+	if (sep)
+		len = sep - hostname;
+	else
+		cifs_dbg(FYI, "%s: probably server name is whole unc: %s\n",
+			 __func__, unc);
+
+	/* Try to interpret hostname as an IPv4 or IPv6 address */
+	rc = cifs_convert_address((struct sockaddr *)&ss, hostname, len);
+	if (rc > 0)
+		goto name_is_IP_address;
+
+	/* Perform the upcall */
+	rc = dns_query(NULL, hostname, len, NULL, ip_addr, NULL);
+	if (rc < 0)
+		cifs_dbg(FYI, "%s: unable to resolve: %*.*s\n",
+			 __func__, len, len, hostname);
+	else
+		cifs_dbg(FYI, "%s: resolved: %*.*s to %s\n",
+			 __func__, len, len, hostname, *ip_addr);
+	return rc;
+
+name_is_IP_address:
+	name = kmalloc(len + 1, GFP_KERNEL);
+	if (!name)
+		return -ENOMEM;
+	memcpy(name, hostname, len);
+	name[len] = 0;
+	cifs_dbg(FYI, "%s: unc is IP, skipping dns upcall: %s\n",
+		 __func__, name);
+	*ip_addr = name;
+	return 0;
+}

sources/4.13/dns_resolve.h

+/*
+ *   fs/cifs/dns_resolve.h -- DNS Resolver upcall management for CIFS DFS
+ *                            Handles host name to IP address resolution
+ *
+ *   Copyright (c) International Business Machines  Corp., 2008
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ *   This library is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU Lesser General Public License as published
+ *   by the Free Software Foundation; either version 2.1 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This library is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ *   the GNU Lesser General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Lesser General Public License
+ *   along with this library; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef _DNS_RESOLVE_H
+#define _DNS_RESOLVE_H
+
+#ifdef __KERNEL__
+extern int dns_resolve_server_name_to_ip(const char *unc, char **ip_addr);
+#endif /* KERNEL */
+
+#endif /* _DNS_RESOLVE_H */

sources/4.13/export.c

+/*
+ *   fs/cifs/export.c
+ *
+ *   Copyright (C) International Business Machines  Corp., 2007
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ *   Common Internet FileSystem (CIFS) client
+ *
+ *   Operations related to support for exporting files via NFSD
+ *
+ *   This library is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU Lesser General Public License as published
+ *   by the Free Software Foundation; either version 2.1 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This library is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ *   the GNU Lesser General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Lesser General Public License
+ *   along with this library; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+ /*
+  * See Documentation/filesystems/nfs/Exporting
+  * and examples in fs/exportfs
+  *
+  * Since cifs is a network file system, an "fsid" must be included for
+  * any nfs exports file entries which refer to cifs paths.  In addition
+  * the cifs mount must be mounted with the "serverino" option (ie use stable
+  * server inode numbers instead of locally generated temporary ones).
+  * Although cifs inodes do not use generation numbers (have generation number
+  * of zero) - the inode number alone should be good enough for simple cases
+  * in which users want to export cifs shares with NFS. The decode and encode
+  * could be improved by using a new routine which expects 64 bit inode numbers
+  * instead of the default 32 bit routines in fs/exportfs
+  *
+  */
+
+#include <linux/fs.h>
+#include <linux/exportfs.h>
+#include "cifsglob.h"
+#include "cifs_debug.h"
+#include "cifsfs.h"
+
+#ifdef CONFIG_CIFS_NFSD_EXPORT
+static struct dentry *cifs_get_parent(struct dentry *dentry)
+{
+	/* BB need to add code here eventually to enable export via NFSD */
+	cifs_dbg(FYI, "get parent for %p\n", dentry);
+	return ERR_PTR(-EACCES);
+}
+
+const struct export_operations cifs_export_ops = {
+	.get_parent = cifs_get_parent,
+/*	Following five export operations are unneeded so far and can default:
+	.get_dentry =
+	.get_name =
+	.find_exported_dentry =
+	.decode_fh =
+	.encode_fs =  */
+};
+
+#endif /* CONFIG_CIFS_NFSD_EXPORT */
+

sources/4.13/fscache.c

+/*
+ *   fs/cifs/fscache.c - CIFS filesystem cache interface
+ *
+ *   Copyright (c) 2010 Novell, Inc.
+ *   Author(s): Suresh Jayaraman <sjayaraman@suse.de>
+ *
+ *   This library is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU Lesser General Public License as published
+ *   by the Free Software Foundation; either version 2.1 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This library is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ *   the GNU Lesser General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Lesser General Public License
+ *   along with this library; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#include "fscache.h"
+#include "cifsglob.h"
+#include "cifs_debug.h"
+#include "cifs_fs_sb.h"
+
+void cifs_fscache_get_client_cookie(struct TCP_Server_Info *server)
+{
+	server->fscache =
+		fscache_acquire_cookie(cifs_fscache_netfs.primary_index,
+				&cifs_fscache_server_index_def, server, true);
+	cifs_dbg(FYI, "%s: (0x%p/0x%p)\n",
+		 __func__, server, server->fscache);
+}
+
+void cifs_fscache_release_client_cookie(struct TCP_Server_Info *server)
+{
+	cifs_dbg(FYI, "%s: (0x%p/0x%p)\n",
+		 __func__, server, server->fscache);
+	fscache_relinquish_cookie(server->fscache, 0);
+	server->fscache = NULL;
+}
+
+void cifs_fscache_get_super_cookie(struct cifs_tcon *tcon)
+{
+	struct TCP_Server_Info *server = tcon->ses->server;
+
+	tcon->fscache =
+		fscache_acquire_cookie(server->fscache,
+				&cifs_fscache_super_index_def, tcon, true);
+	cifs_dbg(FYI, "%s: (0x%p/0x%p)\n",
+		 __func__, server->fscache, tcon->fscache);
+}
+
+void cifs_fscache_release_super_cookie(struct cifs_tcon *tcon)
+{
+	cifs_dbg(FYI, "%s: (0x%p)\n", __func__, tcon->fscache);
+	fscache_relinquish_cookie(tcon->fscache, 0);
+	tcon->fscache = NULL;
+}
+
+static void cifs_fscache_enable_inode_cookie(struct inode *inode)
+{
+	struct cifsInodeInfo *cifsi = CIFS_I(inode);
+	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+	struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
+
+	if (cifsi->fscache)
+		return;
+
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE) {
+		cifsi->fscache = fscache_acquire_cookie(tcon->fscache,
+				&cifs_fscache_inode_object_def, cifsi, true);
+		cifs_dbg(FYI, "%s: got FH cookie (0x%p/0x%p)\n",
+			 __func__, tcon->fscache, cifsi->fscache);
+	}
+}
+
+void cifs_fscache_release_inode_cookie(struct inode *inode)
+{
+	struct cifsInodeInfo *cifsi = CIFS_I(inode);
+
+	if (cifsi->fscache) {
+		cifs_dbg(FYI, "%s: (0x%p)\n", __func__, cifsi->fscache);
+		fscache_relinquish_cookie(cifsi->fscache, 0);
+		cifsi->fscache = NULL;
+	}
+}
+
+static void cifs_fscache_disable_inode_cookie(struct inode *inode)
+{
+	struct cifsInodeInfo *cifsi = CIFS_I(inode);
+
+	if (cifsi->fscache) {
+		cifs_dbg(FYI, "%s: (0x%p)\n", __func__, cifsi->fscache);
+		fscache_uncache_all_inode_pages(cifsi->fscache, inode);
+		fscache_relinquish_cookie(cifsi->fscache, 1);
+		cifsi->fscache = NULL;
+	}
+}
+
+void cifs_fscache_set_inode_cookie(struct inode *inode, struct file *filp)
+{
+	if ((filp->f_flags & O_ACCMODE) != O_RDONLY)
+		cifs_fscache_disable_inode_cookie(inode);
+	else
+		cifs_fscache_enable_inode_cookie(inode);
+}
+
+void cifs_fscache_reset_inode_cookie(struct inode *inode)
+{
+	struct cifsInodeInfo *cifsi = CIFS_I(inode);
+	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+	struct fscache_cookie *old = cifsi->fscache;
+
+	if (cifsi->fscache) {
+		/* retire the current fscache cache and get a new one */
+		fscache_relinquish_cookie(cifsi->fscache, 1);
+
+		cifsi->fscache = fscache_acquire_cookie(
+					cifs_sb_master_tcon(cifs_sb)->fscache,
+					&cifs_fscache_inode_object_def,
+					cifsi, true);
+		cifs_dbg(FYI, "%s: new cookie 0x%p oldcookie 0x%p\n",
+			 __func__, cifsi->fscache, old);
+	}
+}
+
+int cifs_fscache_release_page(struct page *page, gfp_t gfp)
+{
+	if (PageFsCache(page)) {
+		struct inode *inode = page->mapping->host;
+		struct cifsInodeInfo *cifsi = CIFS_I(inode);
+
+		cifs_dbg(FYI, "%s: (0x%p/0x%p)\n",
+			 __func__, page, cifsi->fscache);
+		if (!fscache_maybe_release_page(cifsi->fscache, page, gfp))
+			return 0;
+	}
+
+	return 1;
+}
+
+static void cifs_readpage_from_fscache_complete(struct page *page, void *ctx,
+						int error)
+{
+	cifs_dbg(FYI, "%s: (0x%p/%d)\n", __func__, page, error);
+	if (!error)
+		SetPageUptodate(page);
+	unlock_page(page);
+}
+
+/*
+ * Retrieve a page from FS-Cache
+ */
+int __cifs_readpage_from_fscache(struct inode *inode, struct page *page)
+{
+	int ret;
+
+	cifs_dbg(FYI, "%s: (fsc:%p, p:%p, i:0x%p\n",
+		 __func__, CIFS_I(inode)->fscache, page, inode);
+	ret = fscache_read_or_alloc_page(CIFS_I(inode)->fscache, page,
+					 cifs_readpage_from_fscache_complete,
+					 NULL,
+					 GFP_KERNEL);
+	switch (ret) {
+
+	case 0: /* page found in fscache, read submitted */
+		cifs_dbg(FYI, "%s: submitted\n", __func__);
+		return ret;
+	case -ENOBUFS:	/* page won't be cached */
+	case -ENODATA:	/* page not in cache */
+		cifs_dbg(FYI, "%s: %d\n", __func__, ret);
+		return 1;
+
+	default:
+		cifs_dbg(VFS, "unknown error ret = %d\n", ret);
+	}
+	return ret;
+}
+
+/*
+ * Retrieve a set of pages from FS-Cache
+ */
+int __cifs_readpages_from_fscache(struct inode *inode,
+				struct address_space *mapping,
+				struct list_head *pages,
+				unsigned *nr_pages)
+{
+	int ret;
+
+	cifs_dbg(FYI, "%s: (0x%p/%u/0x%p)\n",
+		 __func__, CIFS_I(inode)->fscache, *nr_pages, inode);
+	ret = fscache_read_or_alloc_pages(CIFS_I(inode)->fscache, mapping,
+					  pages, nr_pages,
+					  cifs_readpage_from_fscache_complete,
+					  NULL,
+					  mapping_gfp_mask(mapping));
+	switch (ret) {
+	case 0:	/* read submitted to the cache for all pages */
+		cifs_dbg(FYI, "%s: submitted\n", __func__);
+		return ret;
+
+	case -ENOBUFS:	/* some pages are not cached and can't be */
+	case -ENODATA:	/* some pages are not cached */
+		cifs_dbg(FYI, "%s: no page\n", __func__);
+		return 1;
+
+	default:
+		cifs_dbg(FYI, "unknown error ret = %d\n", ret);
+	}
+
+	return ret;
+}
+
+void __cifs_readpage_to_fscache(struct inode *inode, struct page *page)
+{
+	int ret;
+
+	cifs_dbg(FYI, "%s: (fsc: %p, p: %p, i: %p)\n",
+		 __func__, CIFS_I(inode)->fscache, page, inode);
+	ret = fscache_write_page(CIFS_I(inode)->fscache, page, GFP_KERNEL);
+	if (ret != 0)
+		fscache_uncache_page(CIFS_I(inode)->fscache, page);
+}
+
+void __cifs_fscache_readpages_cancel(struct inode *inode, struct list_head *pages)
+{
+	cifs_dbg(FYI, "%s: (fsc: %p, i: %p)\n",
+		 __func__, CIFS_I(inode)->fscache, inode);
+	fscache_readpages_cancel(CIFS_I(inode)->fscache, pages);
+}
+
+void __cifs_fscache_invalidate_page(struct page *page, struct inode *inode)
+{
+	struct cifsInodeInfo *cifsi = CIFS_I(inode);
+	struct fscache_cookie *cookie = cifsi->fscache;
+
+	cifs_dbg(FYI, "%s: (0x%p/0x%p)\n", __func__, page, cookie);
+	fscache_wait_on_page_write(cookie, page);
+	fscache_uncache_page(cookie, page);
+}
+

sources/4.13/fscache.h

+/*
+ *   fs/cifs/fscache.h - CIFS filesystem cache interface definitions
+ *
+ *   Copyright (c) 2010 Novell, Inc.
+ *   Authors(s): Suresh Jayaraman (sjayaraman@suse.de>
+ *
+ *   This library is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU Lesser General Public License as published
+ *   by the Free Software Foundation; either version 2.1 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This library is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ *   the GNU Lesser General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Lesser General Public License
+ *   along with this library; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#ifndef _CIFS_FSCACHE_H
+#define _CIFS_FSCACHE_H
+
+#include <linux/fscache.h>
+
+#include "cifsglob.h"
+
+#ifdef CONFIG_CIFS_FSCACHE
+
+extern struct fscache_netfs cifs_fscache_netfs;
+extern const struct fscache_cookie_def cifs_fscache_server_index_def;
+extern const struct fscache_cookie_def cifs_fscache_super_index_def;
+extern const struct fscache_cookie_def cifs_fscache_inode_object_def;
+
+extern int cifs_fscache_register(void);
+extern void cifs_fscache_unregister(void);
+
+/*
+ * fscache.c
+ */
+extern void cifs_fscache_get_client_cookie(struct TCP_Server_Info *);
+extern void cifs_fscache_release_client_cookie(struct TCP_Server_Info *);
+extern void cifs_fscache_get_super_cookie(struct cifs_tcon *);
+extern void cifs_fscache_release_super_cookie(struct cifs_tcon *);
+
+extern void cifs_fscache_release_inode_cookie(struct inode *);
+extern void cifs_fscache_set_inode_cookie(struct inode *, struct file *);
+extern void cifs_fscache_reset_inode_cookie(struct inode *);
+
+extern void __cifs_fscache_invalidate_page(struct page *, struct inode *);
+extern int cifs_fscache_release_page(struct page *page, gfp_t gfp);
+extern int __cifs_readpage_from_fscache(struct inode *, struct page *);
+extern int __cifs_readpages_from_fscache(struct inode *,
+					 struct address_space *,
+					 struct list_head *,
+					 unsigned *);
+extern void __cifs_fscache_readpages_cancel(struct inode *, struct list_head *);
+
+extern void __cifs_readpage_to_fscache(struct inode *, struct page *);
+
+static inline void cifs_fscache_invalidate_page(struct page *page,
+					       struct inode *inode)
+{
+	if (PageFsCache(page))
+		__cifs_fscache_invalidate_page(page, inode);
+}
+
+static inline int cifs_readpage_from_fscache(struct inode *inode,
+					     struct page *page)
+{
+	if (CIFS_I(inode)->fscache)
+		return __cifs_readpage_from_fscache(inode, page);
+
+	return -ENOBUFS;
+}
+
+static inline int cifs_readpages_from_fscache(struct inode *inode,
+					      struct address_space *mapping,
+					      struct list_head *pages,
+					      unsigned *nr_pages)
+{
+	if (CIFS_I(inode)->fscache)
+		return __cifs_readpages_from_fscache(inode, mapping, pages,
+						     nr_pages);
+	return -ENOBUFS;
+}
+
+static inline void cifs_readpage_to_fscache(struct inode *inode,
+					    struct page *page)
+{
+	if (PageFsCache(page))
+		__cifs_readpage_to_fscache(inode, page);
+}
+
+static inline void cifs_fscache_readpages_cancel(struct inode *inode,
+						 struct list_head *pages)
+{
+	if (CIFS_I(inode)->fscache)
+		return __cifs_fscache_readpages_cancel(inode, pages);
+}
+
+#else /* CONFIG_CIFS_FSCACHE */
+static inline int cifs_fscache_register(void) { return 0; }
+static inline void cifs_fscache_unregister(void) {}
+
+static inline void
+cifs_fscache_get_client_cookie(struct TCP_Server_Info *server) {}
+static inline void
+cifs_fscache_release_client_cookie(struct TCP_Server_Info *server) {}
+static inline void cifs_fscache_get_super_cookie(struct cifs_tcon *tcon) {}
+static inline void
+cifs_fscache_release_super_cookie(struct cifs_tcon *tcon) {}
+
+static inline void cifs_fscache_release_inode_cookie(struct inode *inode) {}
+static inline void cifs_fscache_set_inode_cookie(struct inode *inode,
+						 struct file *filp) {}
+static inline void cifs_fscache_reset_inode_cookie(struct inode *inode) {}
+static inline int cifs_fscache_release_page(struct page *page, gfp_t gfp)
+{
+	return 1; /* May release page */
+}
+
+static inline void cifs_fscache_invalidate_page(struct page *page,
+			struct inode *inode) {}
+static inline int
+cifs_readpage_from_fscache(struct inode *inode, struct page *page)
+{
+	return -ENOBUFS;
+}
+
+static inline int cifs_readpages_from_fscache(struct inode *inode,
+					      struct address_space *mapping,
+					      struct list_head *pages,
+					      unsigned *nr_pages)
+{
+	return -ENOBUFS;
+}
+
+static inline void cifs_readpage_to_fscache(struct inode *inode,
+			struct page *page) {}
+
+static inline void cifs_fscache_readpages_cancel(struct inode *inode,
+						 struct list_head *pages)
+{
+}
+
+#endif /* CONFIG_CIFS_FSCACHE */
+
+#endif /* _CIFS_FSCACHE_H */

sources/4.13/ioctl.c

+/*
+ *   fs/cifs/ioctl.c
+ *
+ *   vfs operations that deal with io control
+ *
+ *   Copyright (C) International Business Machines  Corp., 2005,2013
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ *   This library is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU Lesser General Public License as published
+ *   by the Free Software Foundation; either version 2.1 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This library is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ *   the GNU Lesser General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Lesser General Public License
+ *   along with this library; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/fs.h>
+#include <linux/file.h>
+#include <linux/mount.h>
+#include <linux/mm.h>
+#include <linux/pagemap.h>
+#include "cifspdu.h"
+#include "cifsglob.h"
+#include "cifsproto.h"
+#include "cifs_debug.h"
+#include "cifsfs.h"
+#include "cifs_ioctl.h"
+#include <linux/btrfs.h>
+
+static long cifs_ioctl_copychunk(unsigned int xid, struct file *dst_file,
+			unsigned long srcfd)
+{
+	int rc;
+	struct fd src_file;
+	struct inode *src_inode;
+
+	cifs_dbg(FYI, "ioctl copychunk range\n");
+	/* the destination must be opened for writing */
+	if (!(dst_file->f_mode & FMODE_WRITE)) {
+		cifs_dbg(FYI, "file target not open for write\n");
+		return -EINVAL;
+	}
+
+	/* check if target volume is readonly and take reference */
+	rc = mnt_want_write_file(dst_file);
+	if (rc) {
+		cifs_dbg(FYI, "mnt_want_write failed with rc %d\n", rc);
+		return rc;
+	}
+
+	src_file = fdget(srcfd);
+	if (!src_file.file) {
+		rc = -EBADF;
+		goto out_drop_write;
+	}
+
+	if (src_file.file->f_op->unlocked_ioctl != cifs_ioctl) {
+		rc = -EBADF;
+		cifs_dbg(VFS, "src file seems to be from a different filesystem type\n");
+		goto out_fput;
+	}
+
+	src_inode = file_inode(src_file.file);
+	rc = -EINVAL;
+	if (S_ISDIR(src_inode->i_mode))
+		goto out_fput;
+
+	rc = cifs_file_copychunk_range(xid, src_file.file, 0, dst_file, 0,
+					src_inode->i_size, 0);
+	if (rc > 0)
+		rc = 0;
+out_fput:
+	fdput(src_file);
+out_drop_write:
+	mnt_drop_write_file(dst_file);
+	return rc;
+}
+
+static long smb_mnt_get_fsinfo(unsigned int xid, struct cifs_tcon *tcon,
+				void __user *arg)
+{
+	int rc = 0;
+	struct smb_mnt_fs_info *fsinf;
+
+	fsinf = kzalloc(sizeof(struct smb_mnt_fs_info), GFP_KERNEL);
+	if (fsinf == NULL)
+		return -ENOMEM;
+
+	fsinf->version = 1;
+	fsinf->protocol_id = tcon->ses->server->vals->protocol_id;
+	fsinf->device_characteristics =
+			le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics);
+	fsinf->device_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
+	fsinf->fs_attributes = le32_to_cpu(tcon->fsAttrInfo.Attributes);
+	fsinf->max_path_component =
+		le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength);
+	fsinf->vol_serial_number = tcon->vol_serial_number;
+	fsinf->vol_create_time = le64_to_cpu(tcon->vol_create_time);
+	fsinf->share_flags = tcon->share_flags;
+	fsinf->share_caps = le32_to_cpu(tcon->capabilities);
+	fsinf->sector_flags = tcon->ss_flags;
+	fsinf->optimal_sector_size = tcon->perf_sector_size;
+	fsinf->max_bytes_chunk = tcon->max_bytes_chunk;
+	fsinf->maximal_access = tcon->maximal_access;
+	fsinf->cifs_posix_caps = le64_to_cpu(tcon->fsUnixInfo.Capability);
+
+	if (copy_to_user(arg, fsinf, sizeof(struct smb_mnt_fs_info)))
+		rc = -EFAULT;
+
+	kfree(fsinf);
+	return rc;
+}
+
+long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg)
+{
+	struct inode *inode = file_inode(filep);
+	int rc = -ENOTTY; /* strange error - but the precedent */
+	unsigned int xid;
+	struct cifs_sb_info *cifs_sb;
+	struct cifsFileInfo *pSMBFile = filep->private_data;
+	struct cifs_tcon *tcon;
+	__u64	ExtAttrBits = 0;
+	__u64   caps;
+
+	xid = get_xid();
+
+	cifs_sb = CIFS_SB(inode->i_sb);
+	cifs_dbg(FYI, "cifs ioctl 0x%x\n", command);
+	switch (command) {
+		case FS_IOC_GETFLAGS:
+			if (pSMBFile == NULL)
+				break;
+			tcon = tlink_tcon(pSMBFile->tlink);
+			caps = le64_to_cpu(tcon->fsUnixInfo.Capability);
+#ifdef CONFIG_CIFS_POSIX
+			if (CIFS_UNIX_EXTATTR_CAP & caps) {
+				__u64	ExtAttrMask = 0;
+				rc = CIFSGetExtAttr(xid, tcon,
+						    pSMBFile->fid.netfid,
+						    &ExtAttrBits, &ExtAttrMask);
+				if (rc == 0)
+					rc = put_user(ExtAttrBits &
+						FS_FL_USER_VISIBLE,
+						(int __user *)arg);
+				if (rc != EOPNOTSUPP)
+					break;
+			}
+#endif /* CONFIG_CIFS_POSIX */
+			rc = 0;
+			if (CIFS_I(inode)->cifsAttrs & ATTR_COMPRESSED) {
+				/* add in the compressed bit */
+				ExtAttrBits = FS_COMPR_FL;
+				rc = put_user(ExtAttrBits & FS_FL_USER_VISIBLE,
+					      (int __user *)arg);
+			}
+			break;
+		case FS_IOC_SETFLAGS:
+			if (pSMBFile == NULL)
+				break;
+			tcon = tlink_tcon(pSMBFile->tlink);
+			caps = le64_to_cpu(tcon->fsUnixInfo.Capability);
+
+			if (get_user(ExtAttrBits, (int __user *)arg)) {
+				rc = -EFAULT;
+				break;
+			}
+
+			/*
+			 * if (CIFS_UNIX_EXTATTR_CAP & caps)
+			 *	rc = CIFSSetExtAttr(xid, tcon,
+			 *		       pSMBFile->fid.netfid,
+			 *		       extAttrBits,
+			 *		       &ExtAttrMask);
+			 * if (rc != EOPNOTSUPP)
+			 *	break;
+			 */
+
+			/* Currently only flag we can set is compressed flag */
+			if ((ExtAttrBits & FS_COMPR_FL) == 0)
+				break;
+
+			/* Try to set compress flag */
+			if (tcon->ses->server->ops->set_compression) {
+				rc = tcon->ses->server->ops->set_compression(
+							xid, tcon, pSMBFile);
+				cifs_dbg(FYI, "set compress flag rc %d\n", rc);
+			}
+			break;
+		case CIFS_IOC_COPYCHUNK_FILE:
+			rc = cifs_ioctl_copychunk(xid, filep, arg);
+			break;
+		case CIFS_IOC_SET_INTEGRITY:
+			if (pSMBFile == NULL)
+				break;
+			tcon = tlink_tcon(pSMBFile->tlink);
+			if (tcon->ses->server->ops->set_integrity)
+				rc = tcon->ses->server->ops->set_integrity(xid,
+						tcon, pSMBFile);
+			else
+				rc = -EOPNOTSUPP;
+			break;
+		case CIFS_IOC_GET_MNT_INFO:
+			if (pSMBFile == NULL)
+				break;
+			tcon = tlink_tcon(pSMBFile->tlink);
+			rc = smb_mnt_get_fsinfo(xid, tcon, (void __user *)arg);
+			break;
+		case CIFS_ENUMERATE_SNAPSHOTS:
+			if (pSMBFile == NULL)
+				break;
+			if (arg == 0) {
+				rc = -EINVAL;
+				goto cifs_ioc_exit;
+			}
+			tcon = tlink_tcon(pSMBFile->tlink);
+			if (tcon->ses->server->ops->enum_snapshots)
+				rc = tcon->ses->server->ops->enum_snapshots(xid, tcon,
+						pSMBFile, (void __user *)arg);
+			else
+				rc = -EOPNOTSUPP;
+			break;
+		default:
+			cifs_dbg(FYI, "unsupported ioctl\n");
+			break;
+	}
+cifs_ioc_exit:
+	free_xid(xid);
+	return rc;
+}

sources/4.13/ntlmssp.h

+/*
+ *   fs/cifs/ntlmssp.h
+ *
+ *   Copyright (c) International Business Machines  Corp., 2002,2007
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ *   This library is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU Lesser General Public License as published
+ *   by the Free Software Foundation; either version 2.1 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This library is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ *   the GNU Lesser General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Lesser General Public License
+ *   along with this library; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#define NTLMSSP_SIGNATURE "NTLMSSP"
+/* Message Types */
+#define NtLmNegotiate     cpu_to_le32(1)
+#define NtLmChallenge     cpu_to_le32(2)
+#define NtLmAuthenticate  cpu_to_le32(3)
+#define UnknownMessage    cpu_to_le32(8)
+
+/* Negotiate Flags */
+#define NTLMSSP_NEGOTIATE_UNICODE         0x01 /* Text strings are unicode */
+#define NTLMSSP_NEGOTIATE_OEM             0x02 /* Text strings are in OEM */
+#define NTLMSSP_REQUEST_TARGET            0x04 /* Srv returns its auth realm */
+/* define reserved9                       0x08 */
+#define NTLMSSP_NEGOTIATE_SIGN          0x0010 /* Request signing capability */
+#define NTLMSSP_NEGOTIATE_SEAL          0x0020 /* Request confidentiality */
+#define NTLMSSP_NEGOTIATE_DGRAM         0x0040
+#define NTLMSSP_NEGOTIATE_LM_KEY        0x0080 /* Use LM session key */
+/* defined reserved 8                   0x0100 */
+#define NTLMSSP_NEGOTIATE_NTLM          0x0200 /* NTLM authentication */
+#define NTLMSSP_NEGOTIATE_NT_ONLY       0x0400 /* Lanman not allowed */
+#define NTLMSSP_ANONYMOUS               0x0800
+#define NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED 0x1000 /* reserved6 */
+#define NTLMSSP_NEGOTIATE_WORKSTATION_SUPPLIED 0x2000
+#define NTLMSSP_NEGOTIATE_LOCAL_CALL    0x4000 /* client/server same machine */
+#define NTLMSSP_NEGOTIATE_ALWAYS_SIGN   0x8000 /* Sign. All security levels  */
+#define NTLMSSP_TARGET_TYPE_DOMAIN     0x10000
+#define NTLMSSP_TARGET_TYPE_SERVER     0x20000
+#define NTLMSSP_TARGET_TYPE_SHARE      0x40000
+#define NTLMSSP_NEGOTIATE_EXTENDED_SEC 0x80000 /* NB:not related to NTLMv2 pwd*/
+/* #define NTLMSSP_REQUEST_INIT_RESP     0x100000 */
+#define NTLMSSP_NEGOTIATE_IDENTIFY    0x100000
+#define NTLMSSP_REQUEST_ACCEPT_RESP   0x200000 /* reserved5 */
+#define NTLMSSP_REQUEST_NON_NT_KEY    0x400000
+#define NTLMSSP_NEGOTIATE_TARGET_INFO 0x800000
+/* #define reserved4                 0x1000000 */
+#define NTLMSSP_NEGOTIATE_VERSION    0x2000000 /* we do not set */
+/* #define reserved3                 0x4000000 */
+/* #define reserved2                 0x8000000 */
+/* #define reserved1                0x10000000 */
+#define NTLMSSP_NEGOTIATE_128       0x20000000
+#define NTLMSSP_NEGOTIATE_KEY_XCH   0x40000000
+#define NTLMSSP_NEGOTIATE_56        0x80000000
+
+/* Define AV Pair Field IDs */
+enum av_field_type {
+	NTLMSSP_AV_EOL = 0,
+	NTLMSSP_AV_NB_COMPUTER_NAME,
+	NTLMSSP_AV_NB_DOMAIN_NAME,
+	NTLMSSP_AV_DNS_COMPUTER_NAME,
+	NTLMSSP_AV_DNS_DOMAIN_NAME,
+	NTLMSSP_AV_DNS_TREE_NAME,
+	NTLMSSP_AV_FLAGS,
+	NTLMSSP_AV_TIMESTAMP,
+	NTLMSSP_AV_RESTRICTION,
+	NTLMSSP_AV_TARGET_NAME,
+	NTLMSSP_AV_CHANNEL_BINDINGS
+};
+
+/* Although typedefs are not commonly used for structure definitions */
+/* in the Linux kernel, in this particular case they are useful      */
+/* to more closely match the standards document for NTLMSSP from     */
+/* OpenGroup and to make the code more closely match the standard in */
+/* appearance */
+
+typedef struct _SECURITY_BUFFER {
+	__le16 Length;
+	__le16 MaximumLength;
+	__le32 BufferOffset;	/* offset to buffer */
+} __attribute__((packed)) SECURITY_BUFFER;
+
+typedef struct _NEGOTIATE_MESSAGE {
+	__u8 Signature[sizeof(NTLMSSP_SIGNATURE)];
+	__le32 MessageType;     /* NtLmNegotiate = 1 */
+	__le32 NegotiateFlags;
+	SECURITY_BUFFER DomainName;	/* RFC 1001 style and ASCII */
+	SECURITY_BUFFER WorkstationName;	/* RFC 1001 and ASCII */
+	/* SECURITY_BUFFER for version info not present since we
+	   do not set the version is present flag */
+	char DomainString[0];
+	/* followed by WorkstationString */
+} __attribute__((packed)) NEGOTIATE_MESSAGE, *PNEGOTIATE_MESSAGE;
+
+typedef struct _CHALLENGE_MESSAGE {
+	__u8 Signature[sizeof(NTLMSSP_SIGNATURE)];
+	__le32 MessageType;   /* NtLmChallenge = 2 */
+	SECURITY_BUFFER TargetName;
+	__le32 NegotiateFlags;
+	__u8 Challenge[CIFS_CRYPTO_KEY_SIZE];
+	__u8 Reserved[8];
+	SECURITY_BUFFER TargetInfoArray;
+	/* SECURITY_BUFFER for version info not present since we
+	   do not set the version is present flag */
+} __attribute__((packed)) CHALLENGE_MESSAGE, *PCHALLENGE_MESSAGE;
+
+typedef struct _AUTHENTICATE_MESSAGE {
+	__u8 Signature[sizeof(NTLMSSP_SIGNATURE)];
+	__le32 MessageType;  /* NtLmsAuthenticate = 3 */
+	SECURITY_BUFFER LmChallengeResponse;
+	SECURITY_BUFFER NtChallengeResponse;
+	SECURITY_BUFFER DomainName;
+	SECURITY_BUFFER UserName;
+	SECURITY_BUFFER WorkstationName;
+	SECURITY_BUFFER SessionKey;
+	__le32 NegotiateFlags;
+	/* SECURITY_BUFFER for version info not present since we
+	   do not set the version is present flag */
+	char UserString[0];
+} __attribute__((packed)) AUTHENTICATE_MESSAGE, *PAUTHENTICATE_MESSAGE;
+
+/*
+ * Size of the session key (crypto key encrypted with the password
+ */
+
+int decode_ntlmssp_challenge(char *bcc_ptr, int blob_len, struct cifs_ses *ses);
+void build_ntlmssp_negotiate_blob(unsigned char *pbuffer, struct cifs_ses *ses);
+int build_ntlmssp_auth_blob(unsigned char **pbuffer, u16 *buflen,
+			struct cifs_ses *ses,
+			const struct nls_table *nls_cp);

sources/4.13/rfc1002pdu.h

+/*
+ *   fs/cifs/rfc1002pdu.h
+ *
+ *   Protocol Data Unit definitions for RFC 1001/1002 support
+ *
+ *   Copyright (c) International Business Machines  Corp., 2004
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ *   This library is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU Lesser General Public License as published
+ *   by the Free Software Foundation; either version 2.1 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This library is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ *   the GNU Lesser General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Lesser General Public License
+ *   along with this library; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+/* NB: unlike smb/cifs packets, the RFC1002 structures are big endian */
+
+	/* RFC 1002 session packet types */
+#define RFC1002_SESSION_MESSAGE 0x00
+#define RFC1002_SESSION_REQUEST  0x81
+#define RFC1002_POSITIVE_SESSION_RESPONSE 0x82
+#define RFC1002_NEGATIVE_SESSION_RESPONSE 0x83
+#define RFC1002_RETARGET_SESSION_RESPONSE 0x84
+#define RFC1002_SESSION_KEEP_ALIVE 0x85
+
+	/* RFC 1002 flags (only one defined */
+#define RFC1002_LENGTH_EXTEND 0x80 /* high order bit of length (ie +64K) */
+
+struct rfc1002_session_packet {
+	__u8	type;
+	__u8	flags;
+	__u16	length;
+	union {
+		struct {
+			__u8 called_len;
+			__u8 called_name[32];
+			__u8 scope1; /* null */
+			__u8 calling_len;
+			__u8 calling_name[32];
+			__u8 scope2; /* null */
+		} __attribute__((packed)) session_req;
+		struct {
+			__u32 retarget_ip_addr;
+			__u16 port;
+		} __attribute__((packed)) retarget_resp;
+		__u8 neg_ses_resp_error_code;
+		/* POSITIVE_SESSION_RESPONSE packet does not include trailer.
+		SESSION_KEEP_ALIVE packet also does not include a trailer.
+		Trailer for the SESSION_MESSAGE packet is SMB/CIFS header */
+	} __attribute__((packed)) trailer;
+} __attribute__((packed));
+
+/* Negative Session Response error codes */
+#define RFC1002_NOT_LISTENING_CALLED  0x80 /* not listening on called name */
+#define RFC1002_NOT_LISTENING_CALLING 0x81 /* not listening on calling name */
+#define RFC1002_NOT_PRESENT           0x82 /* called name not present */
+#define RFC1002_INSUFFICIENT_RESOURCE 0x83
+#define RFC1002_UNSPECIFIED_ERROR     0x8F
+
+/* RFC 1002 Datagram service packets are not defined here as they
+are not needed for the network filesystem client unless we plan on
+implementing broadcast resolution of the server ip address (from
+server netbios name). Currently server names are resolved only via DNS
+(tcp name) or ip address or an /etc/hosts equivalent mapping to ip address.*/
+
+#define DEFAULT_CIFS_CALLED_NAME  "*SMBSERVER      "

sources/4.13/smb2file.c

+/*
+ *   fs/cifs/smb2file.c
+ *
+ *   Copyright (C) International Business Machines  Corp., 2002, 2011
+ *   Author(s): Steve French (sfrench@us.ibm.com),
+ *              Pavel Shilovsky ((pshilovsky@samba.org) 2012
+ *
+ *   This library is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU Lesser General Public License as published
+ *   by the Free Software Foundation; either version 2.1 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This library is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ *   the GNU Lesser General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Lesser General Public License
+ *   along with this library; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#include <linux/fs.h>
+#include <linux/stat.h>
+#include <linux/slab.h>
+#include <linux/pagemap.h>
+#include <asm/div64.h>
+#include "cifsfs.h"
+#include "cifspdu.h"
+#include "cifsglob.h"
+#include "cifsproto.h"
+#include "cifs_debug.h"
+#include "cifs_fs_sb.h"
+#include "cifs_unicode.h"
+#include "fscache.h"
+#include "smb2proto.h"
+
+int
+smb2_open_file(const unsigned int xid, struct cifs_open_parms *oparms,
+	       __u32 *oplock, FILE_ALL_INFO *buf)
+{
+	int rc;
+	__le16 *smb2_path;
+	struct smb2_file_all_info *smb2_data = NULL;
+	__u8 smb2_oplock[17];
+	struct cifs_fid *fid = oparms->fid;
+	struct network_resiliency_req nr_ioctl_req;
+
+	smb2_path = cifs_convert_path_to_utf16(oparms->path, oparms->cifs_sb);
+	if (smb2_path == NULL) {
+		rc = -ENOMEM;
+		goto out;
+	}
+
+	smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
+			    GFP_KERNEL);
+	if (smb2_data == NULL) {
+		rc = -ENOMEM;
+		goto out;
+	}
+
+	oparms->desired_access |= FILE_READ_ATTRIBUTES;
+	*smb2_oplock = SMB2_OPLOCK_LEVEL_BATCH;
+
+	if (oparms->tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
+		memcpy(smb2_oplock + 1, fid->lease_key, SMB2_LEASE_KEY_SIZE);
+
+	rc = SMB2_open(xid, oparms, smb2_path, smb2_oplock, smb2_data, NULL);
+	if (rc)
+		goto out;
+
+
+	 if (oparms->tcon->use_resilient) {
+		nr_ioctl_req.Timeout = 0; /* use server default (120 seconds) */
+		nr_ioctl_req.Reserved = 0;
+		rc = SMB2_ioctl(xid, oparms->tcon, fid->persistent_fid,
+			fid->volatile_fid, FSCTL_LMR_REQUEST_RESILIENCY,
+			true /* is_fsctl */, false /* use_ipc */,
+			(char *)&nr_ioctl_req, sizeof(nr_ioctl_req),
+			NULL, NULL /* no return info */);
+		if (rc == -EOPNOTSUPP) {
+			cifs_dbg(VFS,
+			     "resiliency not supported by server, disabling\n");
+			oparms->tcon->use_resilient = false;
+		} else if (rc)
+			cifs_dbg(FYI, "error %d setting resiliency\n", rc);
+
+		rc = 0;
+	}
+
+	if (buf) {
+		/* open response does not have IndexNumber field - get it */
+		rc = SMB2_get_srv_num(xid, oparms->tcon, fid->persistent_fid,
+				      fid->volatile_fid,
+				      &smb2_data->IndexNumber);
+		if (rc) {
+			/* let get_inode_info disable server inode numbers */
+			smb2_data->IndexNumber = 0;
+			rc = 0;
+		}
+		move_smb2_info_to_cifs(buf, smb2_data);
+	}
+
+	*oplock = *smb2_oplock;
+out:
+	kfree(smb2_data);
+	kfree(smb2_path);
+	return rc;
+}
+
+int
+smb2_unlock_range(struct cifsFileInfo *cfile, struct file_lock *flock,
+		  const unsigned int xid)
+{
+	int rc = 0, stored_rc;
+	unsigned int max_num, num = 0, max_buf;
+	struct smb2_lock_element *buf, *cur;
+	struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
+	struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
+	struct cifsLockInfo *li, *tmp;
+	__u64 length = 1 + flock->fl_end - flock->fl_start;
+	struct list_head tmp_llist;
+
+	INIT_LIST_HEAD(&tmp_llist);
+
+	/*
+	 * Accessing maxBuf is racy with cifs_reconnect - need to store value
+	 * and check it for zero before using.
+	 */
+	max_buf = tcon->ses->server->maxBuf;
+	if (!max_buf)
+		return -EINVAL;
+
+	max_num = max_buf / sizeof(struct smb2_lock_element);
+	buf = kcalloc(max_num, sizeof(struct smb2_lock_element), GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	cur = buf;
+
+	down_write(&cinode->lock_sem);
+	list_for_each_entry_safe(li, tmp, &cfile->llist->locks, llist) {
+		if (flock->fl_start > li->offset ||
+		    (flock->fl_start + length) <
+		    (li->offset + li->length))
+			continue;
+		if (current->tgid != li->pid)
+			continue;
+		if (cinode->can_cache_brlcks) {
+			/*
+			 * We can cache brlock requests - simply remove a lock
+			 * from the file's list.
+			 */
+			list_del(&li->llist);
+			cifs_del_lock_waiters(li);
+			kfree(li);
+			continue;
+		}
+		cur->Length = cpu_to_le64(li->length);
+		cur->Offset = cpu_to_le64(li->offset);
+		cur->Flags = cpu_to_le32(SMB2_LOCKFLAG_UNLOCK);
+		/*
+		 * We need to save a lock here to let us add it again to the
+		 * file's list if the unlock range request fails on the server.
+		 */
+		list_move(&li->llist, &tmp_llist);
+		if (++num == max_num) {
+			stored_rc = smb2_lockv(xid, tcon,
+					       cfile->fid.persistent_fid,
+					       cfile->fid.volatile_fid,
+					       current->tgid, num, buf);
+			if (stored_rc) {
+				/*
+				 * We failed on the unlock range request - add
+				 * all locks from the tmp list to the head of
+				 * the file's list.
+				 */
+				cifs_move_llist(&tmp_llist,
+						&cfile->llist->locks);
+				rc = stored_rc;
+			} else
+				/*
+				 * The unlock range request succeed - free the
+				 * tmp list.
+				 */
+				cifs_free_llist(&tmp_llist);
+			cur = buf;
+			num = 0;
+		} else
+			cur++;
+	}
+	if (num) {
+		stored_rc = smb2_lockv(xid, tcon, cfile->fid.persistent_fid,
+				       cfile->fid.volatile_fid, current->tgid,
+				       num, buf);
+		if (stored_rc) {
+			cifs_move_llist(&tmp_llist, &cfile->llist->locks);
+			rc = stored_rc;
+		} else
+			cifs_free_llist(&tmp_llist);
+	}
+	up_write(&cinode->lock_sem);
+
+	kfree(buf);
+	return rc;
+}
+
+static int
+smb2_push_mand_fdlocks(struct cifs_fid_locks *fdlocks, const unsigned int xid,
+		       struct smb2_lock_element *buf, unsigned int max_num)
+{
+	int rc = 0, stored_rc;
+	struct cifsFileInfo *cfile = fdlocks->cfile;
+	struct cifsLockInfo *li;
+	unsigned int num = 0;
+	struct smb2_lock_element *cur = buf;
+	struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
+
+	list_for_each_entry(li, &fdlocks->locks, llist) {
+		cur->Length = cpu_to_le64(li->length);
+		cur->Offset = cpu_to_le64(li->offset);
+		cur->Flags = cpu_to_le32(li->type |
+						SMB2_LOCKFLAG_FAIL_IMMEDIATELY);
+		if (++num == max_num) {
+			stored_rc = smb2_lockv(xid, tcon,
+					       cfile->fid.persistent_fid,
+					       cfile->fid.volatile_fid,
+					       current->tgid, num, buf);
+			if (stored_rc)
+				rc = stored_rc;
+			cur = buf;
+			num = 0;
+		} else
+			cur++;
+	}
+	if (num) {
+		stored_rc = smb2_lockv(xid, tcon,
+				       cfile->fid.persistent_fid,
+				       cfile->fid.volatile_fid,
+				       current->tgid, num, buf);
+		if (stored_rc)
+			rc = stored_rc;
+	}
+
+	return rc;
+}
+
+int
+smb2_push_mandatory_locks(struct cifsFileInfo *cfile)
+{
+	int rc = 0, stored_rc;
+	unsigned int xid;
+	unsigned int max_num, max_buf;
+	struct smb2_lock_element *buf;
+	struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
+	struct cifs_fid_locks *fdlocks;
+
+	xid = get_xid();
+
+	/*
+	 * Accessing maxBuf is racy with cifs_reconnect - need to store value
+	 * and check it for zero before using.
+	 */
+	max_buf = tlink_tcon(cfile->tlink)->ses->server->maxBuf;
+	if (max_buf < sizeof(struct smb2_lock_element)) {
+		free_xid(xid);
+		return -EINVAL;
+	}
+
+	max_num = max_buf / sizeof(struct smb2_lock_element);
+	buf = kcalloc(max_num, sizeof(struct smb2_lock_element), GFP_KERNEL);
+	if (!buf) {
+		free_xid(xid);
+		return -ENOMEM;
+	}
+
+	list_for_each_entry(fdlocks, &cinode->llist, llist) {
+		stored_rc = smb2_push_mand_fdlocks(fdlocks, xid, buf, max_num);
+		if (stored_rc)
+			rc = stored_rc;
+	}
+
+	kfree(buf);
+	free_xid(xid);
+	return rc;
+}

sources/4.13/smb2glob.h

+/*
+ *   fs/cifs/smb2glob.h
+ *
+ *   Definitions for various global variables and structures
+ *
+ *   Copyright (C) International Business Machines  Corp., 2002, 2011
+ *                 Etersoft, 2012
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *              Jeremy Allison (jra@samba.org)
+ *              Pavel Shilovsky (pshilovsky@samba.org) 2012
+ *
+ *   This library is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU Lesser General Public License as published
+ *   by the Free Software Foundation; either version 2.1 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This library is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ *   the GNU Lesser General Public License for more details.
+ *
+ */
+#ifndef _SMB2_GLOB_H
+#define _SMB2_GLOB_H
+
+#define SMB2_MAGIC_NUMBER 0xFE534D42
+
+/*
+ *****************************************************************
+ * Constants go here
+ *****************************************************************
+ */
+
+/*
+ * Identifiers for functions that use the open, operation, close pattern
+ * in smb2inode.c:smb2_open_op_close()
+ */
+#define SMB2_OP_SET_DELETE 1
+#define SMB2_OP_SET_INFO 2
+#define SMB2_OP_QUERY_INFO 3
+#define SMB2_OP_QUERY_DIR 4
+#define SMB2_OP_MKDIR 5
+#define SMB2_OP_RENAME 6
+#define SMB2_OP_DELETE 7
+#define SMB2_OP_HARDLINK 8
+#define SMB2_OP_SET_EOF 9
+#define SMB2_OP_RMDIR 10
+
+/* Used when constructing chained read requests. */
+#define CHAINED_REQUEST 1
+#define START_OF_CHAIN 2
+#define END_OF_CHAIN 4
+#define RELATED_REQUEST 8
+
+#define SMB2_SIGNATURE_SIZE (16)
+#define SMB2_NTLMV2_SESSKEY_SIZE (16)
+#define SMB2_HMACSHA256_SIZE (32)
+#define SMB2_CMACAES_SIZE (16)
+#define SMB3_SIGNKEY_SIZE (16)
+
+/* Maximum buffer size value we can send with 1 credit */
+#define SMB2_MAX_BUFFER_SIZE 65536
+
+static inline struct smb2_sync_hdr *get_sync_hdr(void *buf)
+{
+	return &(((struct smb2_hdr *)buf)->sync_hdr);
+}
+
+#endif	/* _SMB2_GLOB_H */

sources/4.13/smb2inode.c

+/*
+ *   fs/cifs/smb2inode.c
+ *
+ *   Copyright (C) International Business Machines  Corp., 2002, 2011
+ *                 Etersoft, 2012
+ *   Author(s): Pavel Shilovsky (pshilovsky@samba.org),
+ *              Steve French (sfrench@us.ibm.com)
+ *
+ *   This library is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU Lesser General Public License as published
+ *   by the Free Software Foundation; either version 2.1 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This library is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ *   the GNU Lesser General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Lesser General Public License
+ *   along with this library; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#include <linux/fs.h>
+#include <linux/stat.h>
+#include <linux/slab.h>
+#include <linux/pagemap.h>
+#include <asm/div64.h>
+#include "cifsfs.h"
+#include "cifspdu.h"
+#include "cifsglob.h"
+#include "cifsproto.h"
+#include "cifs_debug.h"
+#include "cifs_fs_sb.h"
+#include "cifs_unicode.h"
+#include "fscache.h"
+#include "smb2glob.h"
+#include "smb2pdu.h"
+#include "smb2proto.h"
+
+static int
+smb2_open_op_close(const unsigned int xid, struct cifs_tcon *tcon,
+		   struct cifs_sb_info *cifs_sb, const char *full_path,
+		   __u32 desired_access, __u32 create_disposition,
+		   __u32 create_options, void *data, int command)
+{
+	int rc, tmprc = 0;
+	__le16 *utf16_path;
+	__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
+	struct cifs_open_parms oparms;
+	struct cifs_fid fid;
+
+	utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
+	if (!utf16_path)
+		return -ENOMEM;
+
+	oparms.tcon = tcon;
+	oparms.desired_access = desired_access;
+	oparms.share_access = FILE_SHARE_ALL;
+	oparms.disposition = create_disposition;
+	oparms.create_options = create_options;
+	oparms.fid = &fid;
+	oparms.reconnect = false;
+
+	rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
+	if (rc) {
+		kfree(utf16_path);
+		return rc;
+	}
+
+	switch (command) {
+	case SMB2_OP_DELETE:
+		break;
+	case SMB2_OP_QUERY_INFO:
+		tmprc = SMB2_query_info(xid, tcon, fid.persistent_fid,
+					fid.volatile_fid,
+					(struct smb2_file_all_info *)data);
+		break;
+	case SMB2_OP_MKDIR:
+		/*
+		 * Directories are created through parameters in the
+		 * SMB2_open() call.
+		 */
+		break;
+	case SMB2_OP_RMDIR:
+		tmprc = SMB2_rmdir(xid, tcon, fid.persistent_fid,
+				   fid.volatile_fid);
+		break;
+	case SMB2_OP_RENAME:
+		tmprc = SMB2_rename(xid, tcon, fid.persistent_fid,
+				    fid.volatile_fid, (__le16 *)data);
+		break;
+	case SMB2_OP_HARDLINK:
+		tmprc = SMB2_set_hardlink(xid, tcon, fid.persistent_fid,
+					  fid.volatile_fid, (__le16 *)data);
+		break;
+	case SMB2_OP_SET_EOF:
+		tmprc = SMB2_set_eof(xid, tcon, fid.persistent_fid,
+				     fid.volatile_fid, current->tgid,
+				     (__le64 *)data, false);
+		break;
+	case SMB2_OP_SET_INFO:
+		tmprc = SMB2_set_info(xid, tcon, fid.persistent_fid,
+				      fid.volatile_fid,
+				      (FILE_BASIC_INFO *)data);
+		break;
+	default:
+		cifs_dbg(VFS, "Invalid command\n");
+		break;
+	}
+
+	rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
+	if (tmprc)
+		rc = tmprc;
+	kfree(utf16_path);
+	return rc;
+}
+
+void
+move_smb2_info_to_cifs(FILE_ALL_INFO *dst, struct smb2_file_all_info *src)
+{
+	memcpy(dst, src, (size_t)(&src->CurrentByteOffset) - (size_t)src);
+	dst->CurrentByteOffset = src->CurrentByteOffset;
+	dst->Mode = src->Mode;
+	dst->AlignmentRequirement = src->AlignmentRequirement;
+	dst->IndexNumber1 = 0; /* we don't use it */
+}
+
+int
+smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
+		     struct cifs_sb_info *cifs_sb, const char *full_path,
+		     FILE_ALL_INFO *data, bool *adjust_tz, bool *symlink)
+{
+	int rc;
+	struct smb2_file_all_info *smb2_data;
+
+	*adjust_tz = false;
+	*symlink = false;
+
+	smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
+			    GFP_KERNEL);
+	if (smb2_data == NULL)
+		return -ENOMEM;
+
+	rc = smb2_open_op_close(xid, tcon, cifs_sb, full_path,
+				FILE_READ_ATTRIBUTES, FILE_OPEN, 0,
+				smb2_data, SMB2_OP_QUERY_INFO);
+	if (rc == -EOPNOTSUPP) {
+		*symlink = true;
+		/* Failed on a symbolic link - query a reparse point info */
+		rc = smb2_open_op_close(xid, tcon, cifs_sb, full_path,
+					FILE_READ_ATTRIBUTES, FILE_OPEN,
+					OPEN_REPARSE_POINT, smb2_data,
+					SMB2_OP_QUERY_INFO);
+	}
+	if (rc)
+		goto out;
+
+	move_smb2_info_to_cifs(data, smb2_data);
+out:
+	kfree(smb2_data);
+	return rc;
+}
+
+int
+smb2_mkdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
+	   struct cifs_sb_info *cifs_sb)
+{
+	return smb2_open_op_close(xid, tcon, cifs_sb, name,
+				  FILE_WRITE_ATTRIBUTES, FILE_CREATE,
+				  CREATE_NOT_FILE, NULL, SMB2_OP_MKDIR);
+}
+
+void
+smb2_mkdir_setinfo(struct inode *inode, const char *name,
+		   struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon,
+		   const unsigned int xid)
+{
+	FILE_BASIC_INFO data;
+	struct cifsInodeInfo *cifs_i;
+	u32 dosattrs;
+	int tmprc;
+
+	memset(&data, 0, sizeof(data));
+	cifs_i = CIFS_I(inode);
+	dosattrs = cifs_i->cifsAttrs | ATTR_READONLY;
+	data.Attributes = cpu_to_le32(dosattrs);
+	tmprc = smb2_open_op_close(xid, tcon, cifs_sb, name,
+				   FILE_WRITE_ATTRIBUTES, FILE_CREATE,
+				   CREATE_NOT_FILE, &data, SMB2_OP_SET_INFO);
+	if (tmprc == 0)
+		cifs_i->cifsAttrs = dosattrs;
+}
+
+int
+smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
+	   struct cifs_sb_info *cifs_sb)
+{
+	return smb2_open_op_close(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
+				  CREATE_NOT_FILE,
+				  NULL, SMB2_OP_RMDIR);
+}
+
+int
+smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
+	    struct cifs_sb_info *cifs_sb)
+{
+	return smb2_open_op_close(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
+				  CREATE_DELETE_ON_CLOSE | OPEN_REPARSE_POINT,
+				  NULL, SMB2_OP_DELETE);
+}
+
+static int
+smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon,
+		   const char *from_name, const char *to_name,
+		   struct cifs_sb_info *cifs_sb, __u32 access, int command)
+{
+	__le16 *smb2_to_name = NULL;
+	int rc;
+
+	smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb);
+	if (smb2_to_name == NULL) {
+		rc = -ENOMEM;
+		goto smb2_rename_path;
+	}
+
+	rc = smb2_open_op_close(xid, tcon, cifs_sb, from_name, access,
+				FILE_OPEN, 0, smb2_to_name, command);
+smb2_rename_path:
+	kfree(smb2_to_name);
+	return rc;
+}
+
+int
+smb2_rename_path(const unsigned int xid, struct cifs_tcon *tcon,
+		 const char *from_name, const char *to_name,
+		 struct cifs_sb_info *cifs_sb)
+{
+	return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
+				  DELETE, SMB2_OP_RENAME);
+}
+
+int
+smb2_create_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
+		     const char *from_name, const char *to_name,
+		     struct cifs_sb_info *cifs_sb)
+{
+	return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
+				  FILE_READ_ATTRIBUTES, SMB2_OP_HARDLINK);
+}
+
+int
+smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon,
+		   const char *full_path, __u64 size,
+		   struct cifs_sb_info *cifs_sb, bool set_alloc)
+{
+	__le64 eof = cpu_to_le64(size);
+	return smb2_open_op_close(xid, tcon, cifs_sb, full_path,
+				  FILE_WRITE_DATA, FILE_OPEN, 0, &eof,
+				  SMB2_OP_SET_EOF);
+}
+
+int
+smb2_set_file_info(struct inode *inode, const char *full_path,
+		   FILE_BASIC_INFO *buf, const unsigned int xid)
+{
+	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+	struct tcon_link *tlink;
+	int rc;
+
+	if ((buf->CreationTime == 0) && (buf->LastAccessTime == 0) &&
+	    (buf->LastWriteTime == 0) && (buf->ChangeTime) &&
+	    (buf->Attributes == 0))
+		return 0; /* would be a no op, no sense sending this */
+
+	tlink = cifs_sb_tlink(cifs_sb);
+	if (IS_ERR(tlink))
+		return PTR_ERR(tlink);
+
+	rc = smb2_open_op_close(xid, tlink_tcon(tlink), cifs_sb, full_path,
+				FILE_WRITE_ATTRIBUTES, FILE_OPEN, 0, buf,
+				SMB2_OP_SET_INFO);
+	cifs_put_tlink(tlink);
+	return rc;
+}

sources/4.13/smbencrypt.c

+/*
+   Unix SMB/Netbios implementation.
+   Version 1.9.
+   SMB parameters and setup
+   Copyright (C) Andrew Tridgell 1992-2000
+   Copyright (C) Luke Kenneth Casson Leighton 1996-2000
+   Modified by Jeremy Allison 1995.
+   Copyright (C) Andrew Bartlett <abartlet@samba.org> 2002-2003
+   Modified by Steve French (sfrench@us.ibm.com) 2002-2003
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include <linux/crypto.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/fs.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/random.h>
+#include "cifs_fs_sb.h"
+#include "cifs_unicode.h"
+#include "cifspdu.h"
+#include "cifsglob.h"
+#include "cifs_debug.h"
+#include "cifsproto.h"
+
+#ifndef false
+#define false 0
+#endif
+#ifndef true
+#define true 1
+#endif
+
+/* following came from the other byteorder.h to avoid include conflicts */
+#define CVAL(buf,pos) (((unsigned char *)(buf))[pos])
+#define SSVALX(buf,pos,val) (CVAL(buf,pos)=(val)&0xFF,CVAL(buf,pos+1)=(val)>>8)
+#define SSVAL(buf,pos,val) SSVALX((buf),(pos),((__u16)(val)))
+
+static void
+str_to_key(unsigned char *str, unsigned char *key)
+{
+	int i;
+
+	key[0] = str[0] >> 1;
+	key[1] = ((str[0] & 0x01) << 6) | (str[1] >> 2);
+	key[2] = ((str[1] & 0x03) << 5) | (str[2] >> 3);
+	key[3] = ((str[2] & 0x07) << 4) | (str[3] >> 4);
+	key[4] = ((str[3] & 0x0F) << 3) | (str[4] >> 5);
+	key[5] = ((str[4] & 0x1F) << 2) | (str[5] >> 6);
+	key[6] = ((str[5] & 0x3F) << 1) | (str[6] >> 7);
+	key[7] = str[6] & 0x7F;
+	for (i = 0; i < 8; i++)
+		key[i] = (key[i] << 1);
+}
+
+static int
+smbhash(unsigned char *out, const unsigned char *in, unsigned char *key)
+{
+	unsigned char key2[8];
+	struct crypto_cipher *tfm_des;
+
+	str_to_key(key, key2);
+
+	tfm_des = crypto_alloc_cipher("des", 0, 0);
+	if (IS_ERR(tfm_des)) {
+		cifs_dbg(VFS, "could not allocate des crypto API\n");
+		return PTR_ERR(tfm_des);
+	}
+
+	crypto_cipher_setkey(tfm_des, key2, 8);
+	crypto_cipher_encrypt_one(tfm_des, out, in);
+	crypto_free_cipher(tfm_des);
+
+	return 0;
+}
+
+static int
+E_P16(unsigned char *p14, unsigned char *p16)
+{
+	int rc;
+	unsigned char sp8[8] =
+	    { 0x4b, 0x47, 0x53, 0x21, 0x40, 0x23, 0x24, 0x25 };
+
+	rc = smbhash(p16, sp8, p14);
+	if (rc)
+		return rc;
+	rc = smbhash(p16 + 8, sp8, p14 + 7);
+	return rc;
+}
+
+static int
+E_P24(unsigned char *p21, const unsigned char *c8, unsigned char *p24)
+{
+	int rc;
+
+	rc = smbhash(p24, c8, p21);
+	if (rc)
+		return rc;
+	rc = smbhash(p24 + 8, c8, p21 + 7);
+	if (rc)
+		return rc;
+	rc = smbhash(p24 + 16, c8, p21 + 14);
+	return rc;
+}
+
+/* produce a md4 message digest from data of length n bytes */
+int
+mdfour(unsigned char *md4_hash, unsigned char *link_str, int link_len)
+{
+	int rc;
+	unsigned int size;
+	struct crypto_shash *md4;
+	struct sdesc *sdescmd4;
+
+	md4 = crypto_alloc_shash("md4", 0, 0);
+	if (IS_ERR(md4)) {
+		rc = PTR_ERR(md4);
+		cifs_dbg(VFS, "%s: Crypto md4 allocation error %d\n",
+			 __func__, rc);
+		return rc;
+	}
+	size = sizeof(struct shash_desc) + crypto_shash_descsize(md4);
+	sdescmd4 = kmalloc(size, GFP_KERNEL);
+	if (!sdescmd4) {
+		rc = -ENOMEM;
+		goto mdfour_err;
+	}
+	sdescmd4->shash.tfm = md4;
+	sdescmd4->shash.flags = 0x0;
+
+	rc = crypto_shash_init(&sdescmd4->shash);
+	if (rc) {
+		cifs_dbg(VFS, "%s: Could not init md4 shash\n", __func__);
+		goto mdfour_err;
+	}
+	rc = crypto_shash_update(&sdescmd4->shash, link_str, link_len);
+	if (rc) {
+		cifs_dbg(VFS, "%s: Could not update with link_str\n", __func__);
+		goto mdfour_err;
+	}
+	rc = crypto_shash_final(&sdescmd4->shash, md4_hash);
+	if (rc)
+		cifs_dbg(VFS, "%s: Could not generate md4 hash\n", __func__);
+
+mdfour_err:
+	crypto_free_shash(md4);
+	kfree(sdescmd4);
+
+	return rc;
+}
+
+/*
+   This implements the X/Open SMB password encryption
+   It takes a password, a 8 byte "crypt key" and puts 24 bytes of
+   encrypted password into p24 */
+/* Note that password must be uppercased and null terminated */
+int
+SMBencrypt(unsigned char *passwd, const unsigned char *c8, unsigned char *p24)
+{
+	int rc;
+	unsigned char p14[14], p16[16], p21[21];
+
+	memset(p14, '\0', 14);
+	memset(p16, '\0', 16);
+	memset(p21, '\0', 21);
+
+	memcpy(p14, passwd, 14);
+	rc = E_P16(p14, p16);
+	if (rc)
+		return rc;
+
+	memcpy(p21, p16, 16);
+	rc = E_P24(p21, c8, p24);
+
+	return rc;
+}
+
+/*
+ * Creates the MD4 Hash of the users password in NT UNICODE.
+ */
+
+int
+E_md4hash(const unsigned char *passwd, unsigned char *p16,
+	const struct nls_table *codepage)
+{
+	int rc;
+	int len;
+	__le16 wpwd[129];
+
+	/* Password cannot be longer than 128 characters */
+	if (passwd) /* Password must be converted to NT unicode */
+		len = cifs_strtoUTF16(wpwd, passwd, 128, codepage);
+	else {
+		len = 0;
+		*wpwd = 0; /* Ensure string is null terminated */
+	}
+
+	rc = mdfour(p16, (unsigned char *) wpwd, len * sizeof(__le16));
+	memzero_explicit(wpwd, sizeof(wpwd));
+
+	return rc;
+}
+
+/* Does the NT MD4 hash then des encryption. */
+int
+SMBNTencrypt(unsigned char *passwd, unsigned char *c8, unsigned char *p24,
+		const struct nls_table *codepage)
+{
+	int rc;
+	unsigned char p16[16], p21[21];
+
+	memset(p16, '\0', 16);
+	memset(p21, '\0', 21);
+
+	rc = E_md4hash(passwd, p16, codepage);
+	if (rc) {
+		cifs_dbg(FYI, "%s Can't generate NT hash, error: %d\n",
+			 __func__, rc);
+		return rc;
+	}
+	memcpy(p21, p16, 16);
+	rc = E_P24(p21, c8, p24);
+	return rc;
+}

sources/4.13/smberr.h

+/*
+ *   fs/cifs/smberr.h
+ *
+ *   Copyright (c) International Business Machines  Corp., 2002,2004
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ *   See Error Codes section of the SNIA CIFS Specification
+ *   for more information
+ *
+ *   This library is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU Lesser General Public License as published
+ *   by the Free Software Foundation; either version 2.1 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This library is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ *   the GNU Lesser General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Lesser General Public License
+ *   along with this library; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#define SUCCESS	0x00	/* The request was successful. */
+#define ERRDOS	0x01	/* Error is from the core DOS operating system set */
+#define ERRSRV	0x02	/* Error is generated by the file server daemon */
+#define ERRHRD	0x03	/* Error is a hardware error. */
+#define ERRCMD	0xFF	/* Command was not in the "SMB" format. */
+
+/* The following error codes may be generated with the SUCCESS error class.*/
+
+/*#define SUCCESS	0	The request was successful. */
+
+/* The following error codes may be generated with the ERRDOS error class.*/
+
+#define ERRbadfunc		1	/* Invalid function. The server did not
+					   recognize or could not perform a
+					   system call generated by the server,
+					   e.g., set the DIRECTORY attribute on
+					   a data file, invalid seek mode. */
+#define ERRbadfile		2	/* File not found. The last component
+					   of a file's pathname could not be
+					   found. */
+#define ERRbadpath		3	/* Directory invalid. A directory
+					   component in a pathname could not be
+					   found. */
+#define ERRnofids		4	/* Too many open files. The server has
+					   no file handles available. */
+#define ERRnoaccess		5	/* Access denied, the client's context
+					   does not permit the requested
+					   function. This includes the
+					   following conditions: invalid rename
+					   command, write to Fid open for read
+					   only, read on Fid open for write
+					   only, attempt to delete a non-empty
+					   directory */
+#define ERRbadfid		6	/* Invalid file handle. The file handle
+					   specified was not recognized by the
+					   server. */
+#define ERRbadmcb		7	/* Memory control blocks destroyed. */
+#define ERRnomem		8	/* Insufficient server memory to
+					   perform the requested function. */
+#define ERRbadmem		9	/* Invalid memory block address. */
+#define ERRbadenv		10	/* Invalid environment. */
+#define ERRbadformat		11	/* Invalid format. */
+#define ERRbadaccess		12	/* Invalid open mode. */
+#define ERRbaddata		13	/* Invalid data (generated only by
+					   IOCTL calls within the server). */
+#define ERRbaddrive		15	/* Invalid drive specified. */
+#define ERRremcd		16	/* A Delete Directory request attempted
+					   to remove the server's current
+					   directory. */
+#define ERRdiffdevice		17	/* Not same device (e.g., a cross
+					   volume rename was attempted */
+#define ERRnofiles		18	/* A File Search command can find no
+					   more files matching the specified
+					   criteria. */
+#define ERRwriteprot		19	/* media is write protected */
+#define ERRgeneral		31
+#define ERRbadshare		32	/* The sharing mode specified for an
+					   Open conflicts with existing FIDs on
+					   the file. */
+#define ERRlock			33	/* A Lock request conflicted with an
+					   existing lock or specified an
+					   invalid mode, or an Unlock requested
+					   attempted to remove a lock held by
+					   another process. */
+#define ERRunsup		50
+#define ERRnosuchshare		67
+#define ERRfilexists		80	/* The file named in the request
+					   already exists. */
+#define ERRinvparm		87
+#define ERRdiskfull		112
+#define ERRinvname		123
+#define ERRinvlevel		124
+#define ERRdirnotempty		145
+#define ERRnotlocked		158
+#define ERRcancelviolation	173
+#define ERRalreadyexists	183
+#define ERRbadpipe		230
+#define ERRpipebusy		231
+#define ERRpipeclosing		232
+#define ERRnotconnected		233
+#define ERRmoredata		234
+#define ERReasnotsupported	282
+#define ErrQuota		0x200	/* The operation would cause a quota
+					   limit to be exceeded. */
+#define ErrNotALink		0x201	/* A link operation was performed on a
+					   pathname that was not a link. */
+
+/* Below errors are used internally (do not come over the wire) for passthrough
+   from STATUS codes to POSIX only  */
+#define ERRsymlink              0xFFFD
+#define ErrTooManyLinks         0xFFFE
+
+/* Following error codes may be generated with the ERRSRV error class.*/
+
+#define ERRerror		1	/* Non-specific error code. It is
+					   returned under the following
+					   conditions: resource other than disk
+					   space exhausted (e.g. TIDs), first
+					   SMB command was not negotiate,
+					   multiple negotiates attempted, and
+					   internal server error. */
+#define ERRbadpw		2	/* Bad password - name/password pair in
+					   a TreeConnect or Session Setup are
+					   invalid. */
+#define ERRbadtype		3	/* used for indicating DFS referral
+					   needed */
+#define ERRaccess		4	/* The client does not have the
+					   necessary access rights within the
+					   specified context for requested
+					   function. */
+#define ERRinvtid		5	/* The Tid specified in a command was
+					   invalid. */
+#define ERRinvnetname		6	/* Invalid network name in tree
+					   connect. */
+#define ERRinvdevice		7	/* Invalid device - printer request
+					   made to non-printer connection or
+					   non-printer request made to printer
+					   connection. */
+#define ERRqfull		49	/* Print queue full (files) -- returned
+					   by open print file. */
+#define ERRqtoobig		50	/* Print queue full -- no space. */
+#define ERRqeof			51	/* EOF on print queue dump */
+#define ERRinvpfid		52	/* Invalid print file FID. */
+#define ERRsmbcmd		64	/* The server did not recognize the
+					   command received. */
+#define ERRsrverror		65	/* The server encountered an internal
+					   error, e.g., system file
+					   unavailable. */
+#define ERRbadBID		66	/* (obsolete) */
+#define ERRfilespecs		67	/* The Fid and pathname parameters
+					   contained an invalid combination of
+					   values. */
+#define ERRbadLink		68	/* (obsolete) */
+#define ERRbadpermits		69	/* The access permissions specified for
+					   a file or directory are not a valid
+					   combination. */
+#define ERRbadPID		70
+#define ERRsetattrmode		71	/* attribute (mode) is invalid */
+#define ERRpaused		81	/* Server is paused */
+#define ERRmsgoff		82	/* reserved - messaging off */
+#define ERRnoroom		83	/* reserved - no room for message */
+#define ERRrmuns		87	/* reserved - too many remote names */
+#define ERRtimeout		88	/* operation timed out */
+#define ERRnoresource		89	/* No resources available for request
+					   */
+#define ERRtoomanyuids		90	/* Too many UIDs active on this session
+					   */
+#define ERRbaduid		91	/* The UID is not known as a valid user
+					   */
+#define ERRusempx		250	/* temporarily unable to use raw */
+#define ERRusestd		251	/* temporarily unable to use either raw
+					   or mpx */
+#define ERR_NOTIFY_ENUM_DIR	1024
+#define ERRnoSuchUser		2238	/* user account does not exist */
+#define ERRaccountexpired	2239
+#define ERRbadclient		2240	/* can not logon from this client */
+#define ERRbadLogonTime		2241	/* logon hours do not allow this */
+#define ERRpasswordExpired	2242
+#define ERRnetlogonNotStarted	2455
+#define ERRnosupport		0xFFFF

sources/4.13/smbfsctl.h

+/*
+ *   fs/cifs/smbfsctl.h: SMB, CIFS, SMB2 FSCTL definitions
+ *
+ *   Copyright (c) International Business Machines  Corp., 2002,2013
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ *   This library is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU Lesser General Public License as published
+ *   by the Free Software Foundation; either version 2.1 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This library is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ *   the GNU Lesser General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Lesser General Public License
+ *   along with this library; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+/* IOCTL information */
+/*
+ * List of ioctl/fsctl function codes that are or could be useful in the
+ * future to remote clients like cifs or SMB2/SMB3 client.  This is probably
+ * a slightly larger set of fsctls that NTFS local filesystem could handle,
+ * including the seven below that we do not have struct definitions for.
+ * Even with protocol definitions for most of these now available, we still
+ * need to do some experimentation to identify which are practical to do
+ * remotely.  Some of the following, such as the encryption/compression ones
+ * could be invoked from tools via a specialized hook into the VFS rather
+ * than via the standard vfs entry points
+ *
+ * See MS-SMB2 Section 2.2.31 (last checked June 2013, all of that list are
+ * below). Additional detail on less common ones can be found in MS-FSCC
+ * section 2.3.
+ */
+#define FSCTL_DFS_GET_REFERRALS      0x00060194
+#define FSCTL_DFS_GET_REFERRALS_EX   0x000601B0
+#define FSCTL_REQUEST_OPLOCK_LEVEL_1 0x00090000
+#define FSCTL_REQUEST_OPLOCK_LEVEL_2 0x00090004
+#define FSCTL_REQUEST_BATCH_OPLOCK   0x00090008
+#define FSCTL_LOCK_VOLUME            0x00090018
+#define FSCTL_UNLOCK_VOLUME          0x0009001C
+#define FSCTL_IS_PATHNAME_VALID      0x0009002C /* BB add struct */
+#define FSCTL_GET_COMPRESSION        0x0009003C /* BB add struct */
+#define FSCTL_SET_COMPRESSION        0x0009C040 /* BB add struct */
+#define FSCTL_QUERY_FAT_BPB          0x00090058 /* BB add struct */
+/* Verify the next FSCTL number, we had it as 0x00090090 before */
+#define FSCTL_FILESYSTEM_GET_STATS   0x00090060 /* BB add struct */
+#define FSCTL_GET_NTFS_VOLUME_DATA   0x00090064 /* BB add struct */
+#define FSCTL_GET_RETRIEVAL_POINTERS 0x00090073 /* BB add struct */
+#define FSCTL_IS_VOLUME_DIRTY        0x00090078 /* BB add struct */
+#define FSCTL_ALLOW_EXTENDED_DASD_IO 0x00090083 /* BB add struct */
+#define FSCTL_REQUEST_FILTER_OPLOCK  0x0009008C
+#define FSCTL_FIND_FILES_BY_SID      0x0009008F /* BB add struct */
+#define FSCTL_SET_OBJECT_ID          0x00090098 /* BB add struct */
+#define FSCTL_GET_OBJECT_ID          0x0009009C /* BB add struct */
+#define FSCTL_DELETE_OBJECT_ID       0x000900A0 /* BB add struct */
+#define FSCTL_SET_REPARSE_POINT      0x000900A4 /* BB add struct */
+#define FSCTL_GET_REPARSE_POINT      0x000900A8 /* BB add struct */
+#define FSCTL_DELETE_REPARSE_POINT   0x000900AC /* BB add struct */
+#define FSCTL_SET_OBJECT_ID_EXTENDED 0x000900BC /* BB add struct */
+#define FSCTL_CREATE_OR_GET_OBJECT_ID 0x000900C0 /* BB add struct */
+#define FSCTL_SET_SPARSE             0x000900C4 /* BB add struct */
+#define FSCTL_SET_ZERO_DATA          0x000980C8
+#define FSCTL_SET_ENCRYPTION         0x000900D7 /* BB add struct */
+#define FSCTL_ENCRYPTION_FSCTL_IO    0x000900DB /* BB add struct */
+#define FSCTL_WRITE_RAW_ENCRYPTED    0x000900DF /* BB add struct */
+#define FSCTL_READ_RAW_ENCRYPTED     0x000900E3 /* BB add struct */
+#define FSCTL_READ_FILE_USN_DATA     0x000900EB /* BB add struct */
+#define FSCTL_WRITE_USN_CLOSE_RECORD 0x000900EF /* BB add struct */
+#define FSCTL_SIS_COPYFILE           0x00090100 /* BB add struct */
+#define FSCTL_RECALL_FILE            0x00090117 /* BB add struct */
+#define FSCTL_QUERY_SPARING_INFO     0x00090138 /* BB add struct */
+#define FSCTL_SET_ZERO_ON_DEALLOC    0x00090194 /* BB add struct */
+#define FSCTL_SET_SHORT_NAME_BEHAVIOR 0x000901B4 /* BB add struct */
+#define FSCTL_GET_INTEGRITY_INFORMATION 0x0009027C
+#define FSCTL_QUERY_ALLOCATED_RANGES 0x000940CF /* BB add struct */
+#define FSCTL_SET_DEFECT_MANAGEMENT  0x00098134 /* BB add struct */
+#define FSCTL_FILE_LEVEL_TRIM        0x00098208 /* BB add struct */
+#define FSCTL_DUPLICATE_EXTENTS_TO_FILE 0x00098344
+#define FSCTL_SIS_LINK_FILES         0x0009C104
+#define FSCTL_SET_INTEGRITY_INFORMATION 0x0009C280
+#define FSCTL_PIPE_PEEK              0x0011400C /* BB add struct */
+#define FSCTL_PIPE_TRANSCEIVE        0x0011C017 /* BB add struct */
+/* strange that the number for this op is not sequential with previous op */
+#define FSCTL_PIPE_WAIT              0x00110018 /* BB add struct */
+/* Enumerate previous versions of a file */
+#define FSCTL_SRV_ENUMERATE_SNAPSHOTS 0x00144064
+/* Retrieve an opaque file reference for server-side data movement ie copy */
+#define FSCTL_SRV_REQUEST_RESUME_KEY 0x00140078
+#define FSCTL_LMR_REQUEST_RESILIENCY 0x001401D4
+#define FSCTL_LMR_GET_LINK_TRACK_INF 0x001400E8 /* BB add struct */
+#define FSCTL_LMR_SET_LINK_TRACK_INF 0x001400EC /* BB add struct */
+#define FSCTL_VALIDATE_NEGOTIATE_INFO 0x00140204
+/* Perform server-side data movement */
+#define FSCTL_SRV_COPYCHUNK 0x001440F2
+#define FSCTL_SRV_COPYCHUNK_WRITE 0x001480F2
+#define FSCTL_QUERY_NETWORK_INTERFACE_INFO 0x001401FC /* BB add struct */
+#define FSCTL_SRV_READ_HASH          0x001441BB /* BB add struct */
+
+/* See FSCC 2.1.2.5 */
+#define IO_REPARSE_TAG_MOUNT_POINT   0xA0000003
+#define IO_REPARSE_TAG_HSM           0xC0000004
+#define IO_REPARSE_TAG_SIS           0x80000007
+#define IO_REPARSE_TAG_HSM2          0x80000006
+#define IO_REPARSE_TAG_DRIVER_EXTENDER 0x80000005
+/* Used by the DFS filter. See MS-DFSC */
+#define IO_REPARSE_TAG_DFS           0x8000000A
+/* Used by the DFS filter See MS-DFSC */
+#define IO_REPARSE_TAG_DFSR          0x80000012
+#define IO_REPARSE_TAG_FILTER_MANAGER 0x8000000B
+/* See section MS-FSCC 2.1.2.4 */
+#define IO_REPARSE_TAG_SYMLINK       0xA000000C
+#define IO_REPARSE_TAG_DEDUP         0x80000013
+#define IO_REPARSE_APPXSTREAM	     0xC0000014
+/* NFS symlinks, Win 8/SMB3 and later */
+#define IO_REPARSE_TAG_NFS           0x80000014
+
+/* fsctl flags */
+/* If Flags is set to this value, the request is an FSCTL not ioctl request */
+#define SMB2_0_IOCTL_IS_FSCTL		0x00000001
+

sources/4.13/xattr.c

+/*
+ *   fs/cifs/xattr.c
+ *
+ *   Copyright (c) International Business Machines  Corp., 2003, 2007
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ *   This library is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU Lesser General Public License as published
+ *   by the Free Software Foundation; either version 2.1 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This library is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ *   the GNU Lesser General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Lesser General Public License
+ *   along with this library; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/fs.h>
+#include <linux/posix_acl_xattr.h>
+#include <linux/slab.h>
+#include <linux/xattr.h>
+#include "cifsfs.h"
+#include "cifspdu.h"
+#include "cifsglob.h"
+#include "cifsproto.h"
+#include "cifs_debug.h"
+#include "cifs_fs_sb.h"
+#include "cifs_unicode.h"
+
+#define MAX_EA_VALUE_SIZE 65535
+#define CIFS_XATTR_CIFS_ACL "system.cifs_acl"
+#define CIFS_XATTR_ATTRIB "cifs.dosattrib"  /* full name: user.cifs.dosattrib */
+#define CIFS_XATTR_CREATETIME "cifs.creationtime"  /* user.cifs.creationtime */
+/* BB need to add server (Samba e.g) support for security and trusted prefix */
+
+enum { XATTR_USER, XATTR_CIFS_ACL, XATTR_ACL_ACCESS, XATTR_ACL_DEFAULT };
+
+static int cifs_xattr_set(const struct xattr_handler *handler,
+			  struct dentry *dentry, struct inode *inode,
+			  const char *name, const void *value,
+			  size_t size, int flags)
+{
+	int rc = -EOPNOTSUPP;
+	unsigned int xid;
+	struct super_block *sb = dentry->d_sb;
+	struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
+	struct tcon_link *tlink;
+	struct cifs_tcon *pTcon;
+	char *full_path;
+
+	tlink = cifs_sb_tlink(cifs_sb);
+	if (IS_ERR(tlink))
+		return PTR_ERR(tlink);
+	pTcon = tlink_tcon(tlink);
+
+	xid = get_xid();
+
+	full_path = build_path_from_dentry(dentry);
+	if (full_path == NULL) {
+		rc = -ENOMEM;
+		goto out;
+	}
+	/* return dos attributes as pseudo xattr */
+	/* return alt name if available as pseudo attr */
+
+	/* if proc/fs/cifs/streamstoxattr is set then
+		search server for EAs or streams to
+		returns as xattrs */
+	if (size > MAX_EA_VALUE_SIZE) {
+		cifs_dbg(FYI, "size of EA value too large\n");
+		rc = -EOPNOTSUPP;
+		goto out;
+	}
+
+	switch (handler->flags) {
+	case XATTR_USER:
+		if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
+			goto out;
+
+		if (pTcon->ses->server->ops->set_EA)
+			rc = pTcon->ses->server->ops->set_EA(xid, pTcon,
+				full_path, name, value, (__u16)size,
+				cifs_sb->local_nls, cifs_remap(cifs_sb));
+		break;
+
+	case XATTR_CIFS_ACL: {
+#ifdef CONFIG_CIFS_ACL
+		struct cifs_ntsd *pacl;
+
+		if (!value)
+			goto out;
+		pacl = kmalloc(size, GFP_KERNEL);
+		if (!pacl) {
+			rc = -ENOMEM;
+		} else {
+			memcpy(pacl, value, size);
+			if (value &&
+			    pTcon->ses->server->ops->set_acl)
+				rc = pTcon->ses->server->ops->set_acl(pacl,
+						size, inode,
+						full_path, CIFS_ACL_DACL);
+			else
+				rc = -EOPNOTSUPP;
+			if (rc == 0) /* force revalidate of the inode */
+				CIFS_I(inode)->time = 0;
+			kfree(pacl);
+		}
+#endif /* CONFIG_CIFS_ACL */
+		break;
+	}
+
+	case XATTR_ACL_ACCESS:
+#ifdef CONFIG_CIFS_POSIX
+		if (!value)
+			goto out;
+		if (sb->s_flags & MS_POSIXACL)
+			rc = CIFSSMBSetPosixACL(xid, pTcon, full_path,
+				value, (const int)size,
+				ACL_TYPE_ACCESS, cifs_sb->local_nls,
+				cifs_remap(cifs_sb));
+#endif  /* CONFIG_CIFS_POSIX */
+		break;
+
+	case XATTR_ACL_DEFAULT:
+#ifdef CONFIG_CIFS_POSIX
+		if (!value)
+			goto out;
+		if (sb->s_flags & MS_POSIXACL)
+			rc = CIFSSMBSetPosixACL(xid, pTcon, full_path,
+				value, (const int)size,
+				ACL_TYPE_DEFAULT, cifs_sb->local_nls,
+				cifs_remap(cifs_sb));
+#endif  /* CONFIG_CIFS_POSIX */
+		break;
+	}
+
+out:
+	kfree(full_path);
+	free_xid(xid);
+	cifs_put_tlink(tlink);
+	return rc;
+}
+
+static int cifs_attrib_get(struct dentry *dentry,
+			   struct inode *inode, void *value,
+			   size_t size)
+{
+	ssize_t rc;
+	__u32 *pattribute;
+
+	rc = cifs_revalidate_dentry_attr(dentry);
+
+	if (rc)
+		return rc;
+
+	if ((value == NULL) || (size == 0))
+		return sizeof(__u32);
+	else if (size < sizeof(__u32))
+		return -ERANGE;
+
+	/* return dos attributes as pseudo xattr */
+	pattribute = (__u32 *)value;
+	*pattribute = CIFS_I(inode)->cifsAttrs;
+
+	return sizeof(__u32);
+}
+
+static int cifs_creation_time_get(struct dentry *dentry, struct inode *inode,
+				  void *value, size_t size)
+{
+	ssize_t rc;
+	__u64 * pcreatetime;
+
+	rc = cifs_revalidate_dentry_attr(dentry);
+	if (rc)
+		return rc;
+
+	if ((value == NULL) || (size == 0))
+		return sizeof(__u64);
+	else if (size < sizeof(__u64))
+		return -ERANGE;
+
+	/* return dos attributes as pseudo xattr */
+	pcreatetime = (__u64 *)value;
+	*pcreatetime = CIFS_I(inode)->createtime;
+	return sizeof(__u64);
+}
+
+
+static int cifs_xattr_get(const struct xattr_handler *handler,
+			  struct dentry *dentry, struct inode *inode,
+			  const char *name, void *value, size_t size)
+{
+	ssize_t rc = -EOPNOTSUPP;
+	unsigned int xid;
+	struct super_block *sb = dentry->d_sb;
+	struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
+	struct tcon_link *tlink;
+	struct cifs_tcon *pTcon;
+	char *full_path;
+
+	tlink = cifs_sb_tlink(cifs_sb);
+	if (IS_ERR(tlink))
+		return PTR_ERR(tlink);
+	pTcon = tlink_tcon(tlink);
+
+	xid = get_xid();
+
+	full_path = build_path_from_dentry(dentry);
+	if (full_path == NULL) {
+		rc = -ENOMEM;
+		goto out;
+	}
+
+	/* return alt name if available as pseudo attr */
+	switch (handler->flags) {
+	case XATTR_USER:
+		cifs_dbg(FYI, "%s:querying user xattr %s\n", __func__, name);
+		if (strcmp(name, CIFS_XATTR_ATTRIB) == 0) {
+			rc = cifs_attrib_get(dentry, inode, value, size);
+			break;
+		} else if (strcmp(name, CIFS_XATTR_CREATETIME) == 0) {
+			rc = cifs_creation_time_get(dentry, inode, value, size);
+			break;
+		}
+
+		if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
+			goto out;
+
+		if (pTcon->ses->server->ops->query_all_EAs)
+			rc = pTcon->ses->server->ops->query_all_EAs(xid, pTcon,
+				full_path, name, value, size, cifs_sb);
+		break;
+
+	case XATTR_CIFS_ACL: {
+#ifdef CONFIG_CIFS_ACL
+		u32 acllen;
+		struct cifs_ntsd *pacl;
+
+		if (pTcon->ses->server->ops->get_acl == NULL)
+			goto out; /* rc already EOPNOTSUPP */
+
+		pacl = pTcon->ses->server->ops->get_acl(cifs_sb,
+				inode, full_path, &acllen);
+		if (IS_ERR(pacl)) {
+			rc = PTR_ERR(pacl);
+			cifs_dbg(VFS, "%s: error %zd getting sec desc\n",
+				 __func__, rc);
+		} else {
+			if (value) {
+				if (acllen > size)
+					acllen = -ERANGE;
+				else
+					memcpy(value, pacl, acllen);
+			}
+			rc = acllen;
+			kfree(pacl);
+		}
+#endif  /* CONFIG_CIFS_ACL */
+		break;
+	}
+
+	case XATTR_ACL_ACCESS:
+#ifdef CONFIG_CIFS_POSIX
+		if (sb->s_flags & MS_POSIXACL)
+			rc = CIFSSMBGetPosixACL(xid, pTcon, full_path,
+				value, size, ACL_TYPE_ACCESS,
+				cifs_sb->local_nls,
+				cifs_remap(cifs_sb));
+#endif  /* CONFIG_CIFS_POSIX */
+		break;
+
+	case XATTR_ACL_DEFAULT:
+#ifdef CONFIG_CIFS_POSIX
+		if (sb->s_flags & MS_POSIXACL)
+			rc = CIFSSMBGetPosixACL(xid, pTcon, full_path,
+				value, size, ACL_TYPE_DEFAULT,
+				cifs_sb->local_nls,
+				cifs_remap(cifs_sb));
+#endif  /* CONFIG_CIFS_POSIX */
+		break;
+	}
+
+	/* We could add an additional check for streams ie
+	    if proc/fs/cifs/streamstoxattr is set then
+		search server for EAs or streams to
+		returns as xattrs */
+
+	if (rc == -EINVAL)
+		rc = -EOPNOTSUPP;
+
+out:
+	kfree(full_path);
+	free_xid(xid);
+	cifs_put_tlink(tlink);
+	return rc;
+}
+
+ssize_t cifs_listxattr(struct dentry *direntry, char *data, size_t buf_size)
+{
+	ssize_t rc = -EOPNOTSUPP;
+	unsigned int xid;
+	struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb);
+	struct tcon_link *tlink;
+	struct cifs_tcon *pTcon;
+	char *full_path;
+
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
+		return -EOPNOTSUPP;
+
+	tlink = cifs_sb_tlink(cifs_sb);
+	if (IS_ERR(tlink))
+		return PTR_ERR(tlink);
+	pTcon = tlink_tcon(tlink);
+
+	xid = get_xid();
+
+	full_path = build_path_from_dentry(direntry);
+	if (full_path == NULL) {
+		rc = -ENOMEM;
+		goto list_ea_exit;
+	}
+	/* return dos attributes as pseudo xattr */
+	/* return alt name if available as pseudo attr */
+
+	/* if proc/fs/cifs/streamstoxattr is set then
+		search server for EAs or streams to
+		returns as xattrs */
+
+	if (pTcon->ses->server->ops->query_all_EAs)
+		rc = pTcon->ses->server->ops->query_all_EAs(xid, pTcon,
+				full_path, NULL, data, buf_size, cifs_sb);
+list_ea_exit:
+	kfree(full_path);
+	free_xid(xid);
+	cifs_put_tlink(tlink);
+	return rc;
+}
+
+static const struct xattr_handler cifs_user_xattr_handler = {
+	.prefix = XATTR_USER_PREFIX,
+	.flags = XATTR_USER,
+	.get = cifs_xattr_get,
+	.set = cifs_xattr_set,
+};
+
+/* os2.* attributes are treated like user.* attributes */
+static const struct xattr_handler cifs_os2_xattr_handler = {
+	.prefix = XATTR_OS2_PREFIX,
+	.flags = XATTR_USER,
+	.get = cifs_xattr_get,
+	.set = cifs_xattr_set,
+};
+
+static const struct xattr_handler cifs_cifs_acl_xattr_handler = {
+	.name = CIFS_XATTR_CIFS_ACL,
+	.flags = XATTR_CIFS_ACL,
+	.get = cifs_xattr_get,
+	.set = cifs_xattr_set,
+};
+
+static const struct xattr_handler cifs_posix_acl_access_xattr_handler = {
+	.name = XATTR_NAME_POSIX_ACL_ACCESS,
+	.flags = XATTR_ACL_ACCESS,
+	.get = cifs_xattr_get,
+	.set = cifs_xattr_set,
+};
+
+static const struct xattr_handler cifs_posix_acl_default_xattr_handler = {
+	.name = XATTR_NAME_POSIX_ACL_DEFAULT,
+	.flags = XATTR_ACL_DEFAULT,
+	.get = cifs_xattr_get,
+	.set = cifs_xattr_set,
+};
+
+const struct xattr_handler *cifs_xattr_handlers[] = {
+	&cifs_user_xattr_handler,
+	&cifs_os2_xattr_handler,
+	&cifs_cifs_acl_xattr_handler,
+	&cifs_posix_acl_access_xattr_handler,
+	&cifs_posix_acl_default_xattr_handler,
+	NULL
+};