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| -rw-r--r-- | fs/smb/client/Kconfig | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/fs/smb/client/Kconfig b/fs/smb/client/Kconfig new file mode 100644 index 000000000..3b7e3b9e4 --- /dev/null +++ b/fs/smb/client/Kconfig @@ -0,0 +1,203 @@ +# SPDX-License-Identifier: GPL-2.0-only +config CIFS + tristate "SMB3 and CIFS support (advanced network filesystem)" + depends on INET + select NLS + select CRYPTO + select CRYPTO_MD5 + select CRYPTO_SHA256 + select CRYPTO_SHA512 + select CRYPTO_CMAC + select CRYPTO_HMAC + select CRYPTO_AEAD2 + select CRYPTO_CCM + select CRYPTO_GCM + select CRYPTO_ECB + select CRYPTO_AES + select KEYS + select DNS_RESOLVER + select ASN1 + select OID_REGISTRY + help + This is the client VFS module for the SMB3 family of NAS protocols, + (including support for the most recent, most secure dialect SMB3.1.1) + as well as for earlier dialects such as SMB2.1, SMB2 and the older + 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 10, Windows Server 2016, + MacOS) and even in the cloud (e.g. Microsoft Azure). + 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). Use of + dialects older than SMB2.1 is often discouraged on public networks. + This module also provides limited support for OS/2 and Windows ME + and similar very old servers. + + This 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, RDMA + (smbdirect), advanced security features, per-share encryption, + directory leases, 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, Azure, Macs or Windows from this machine, say Y. + +config CIFS_STATS2 + bool "Extended statistics" + depends on CIFS + default y + 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 Documentation/admin-guide/cifs/usage.rst + for more details. These additional statistics may have a minor effect + on performance and memory utilization. + + If unsure, say Y. + +config CIFS_ALLOW_INSECURE_LEGACY + bool "Support legacy servers which use less secure dialects" + depends on CIFS + default y + help + Modern dialects, SMB2.1 and later (including SMB3 and 3.1.1), have + additional security features, including protection against + man-in-the-middle attacks and stronger crypto hashes, so the use + of legacy dialects (SMB1/CIFS and SMB2.0) is discouraged. + + Disabling this option prevents users from using vers=1.0 or vers=2.0 + on mounts with cifs.ko + + If unsure, say Y. + +config CIFS_UPCALL + bool "Kerberos/SPNEGO advanced session setup" + depends on CIFS + 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 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 && CIFS_ALLOW_INSECURE_LEGACY && 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_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 + 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 in order to reconnect to + servers if their addresses change or for implicit mounts of + DFS junction points. If unsure, say Y. + +config CIFS_SWN_UPCALL + bool "SWN feature support" + depends on CIFS + help + The Service Witness Protocol (SWN) is used to get notifications + from a highly available server of resource state changes. This + feature enables an upcall mechanism for CIFS which contacts a + userspace daemon to establish the DCE/RPC connection to retrieve + the cluster available interfaces and resource change notifications. + 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_SMB_DIRECT + bool "SMB Direct support" + depends on CIFS=m && INFINIBAND && INFINIBAND_ADDR_TRANS || CIFS=y && INFINIBAND=y && INFINIBAND_ADDR_TRANS=y + help + Enables SMB Direct support for SMB 3.0, 3.02 and 3.1.1. + SMB Direct allows transferring SMB packets over RDMA. If unsure, + say Y. + +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. + +config CIFS_ROOT + bool "SMB root file system (Experimental)" + depends on CIFS=y && IP_PNP + help + Enables root file system support over SMB protocol. + + Most people say N here. |