RE: [PATCH v7 00/13] ksmbd: introduce new SMB3 kernel server

[Namjae Jeon]

> This is the patch series for ksmbd kernel server.
> 
> What is ksmbd ?
> ===============
> 
> The SMB family of protocols is the most widely deployed network filesystem protocol, the default on
> Windows and Macs (and even on many phones and tablets), with clients and servers on all major
> operating systems, but lacked a kernel server for Linux. For many cases the current userspace server
> choices were suboptimal either due to memory footprint, performance or difficulty integrating well
> with advanced Linux features.
> 
> ksmbd is a new kernel module which implements the server-side of the SMB3 protocol.
> The target is to provide optimized performance, GPLv2 SMB server, better lease handling (distributed
> caching). The bigger goal is to add new features more rapidly (e.g. RDMA aka "smbdirect", and recent
> encryption and signing improvements to the protocol) which are easier to develop on a smaller, more
> tightly optimized kernel server than for example in Samba.  The Samba project is much broader in scope
> (tools, security services, LDAP, Active Directory Domain Controller, and a cross platform file server
> for a wider variety of purposes) but the user space file server portion of Samba has proved hard to
> optimize for some Linux workloads, including for smaller devices. This is not meant to replace Samba,
> but rather be an extension to allow better optimizing for Linux, and will continue to integrate well
> with Samba user space tools and libraries where appropriate.
> Working with the Samba team we have already made sure that the configuration files and xattrs are in a
> compatible format between the kernel and user space server.
> 
> 
> Architecture
> ============
> 
>                |--- ...
>        --------|--- ksmbd/3 - Client 3
>        |-------|--- ksmbd/2 - Client 2
>        |       |         ____________________________________________________
>        |       |        |- Client 1                                          |
> <--- Socket ---|--- ksmbd/1   <<= Authentication : NTLM/NTLM2, Kerberos      |
>        |       |      | |     <<= SMB engine : SMB2, SMB2.1, SMB3, SMB3.0.2, |
>        |       |      | |                SMB3.1.1                            |
>        |       |      | |____________________________________________________|
>        |       |      |
>        |       |      |--- VFS --- Local Filesystem
>        |       |
> KERNEL |--- ksmbd/0(forker kthread)
> ---------------||-------------------------------------------------------
> ---------------||--------
> USER           ||
>                || communication using NETLINK
>                ||  ______________________________________________
>                || |                                              |
>         ksmbd.mountd <<= DCE/RPC(srvsvc, wkssvc, samr, lsarpc)   |
>                ^  |  <<= configure shares setting, user accounts |
>                |  |______________________________________________|
>                |
>                |------ smb.conf(config file)
>                |
>                |------ ksmbdpwd.db(user account/password file)
>                             ^
>   ksmbd.adduser ------------|
> 
> The subset of performance related operations(open/read/write/close etc.) belong in kernelspace(ksmbd)
> and the other subset which belong to operations(DCE/RPC, user account/share database) which are not
> really related with performance are handled in userspace(ksmbd.mountd).
> 
> When the ksmbd.mountd is started, It starts up a forker thread at initialization time and opens a
> dedicated port 445 for listening to SMB requests. Whenever new clients make request, Forker thread
> will accept the client connection and fork a new thread for dedicated communication channel between
> the client and the server.
> 
> 
> ksmbd feature status
> ====================
> 
> ============================== =================================================
> Feature name                   Status
> ============================== =================================================
> Dialects                       Supported. SMB2.1 SMB3.0, SMB3.1.1 dialects
>                                (intentionally excludes security vulnerable SMB1 dialect).
> Auto Negotiation               Supported.
> Compound Request               Supported.
> Oplock Cache Mechanism         Supported.
> SMB2 leases(v1 lease)          Supported.
> Directory leases(v2 lease)     Planned for future.
> Multi-credits                  Supported.
> NTLM/NTLMv2                    Supported.
> HMAC-SHA256 Signing            Supported.
> Secure negotiate               Supported.
> Signing Update                 Supported.
> Pre-authentication integrity   Supported.
> SMB3 encryption(CCM, GCM)      Supported. (CCM and GCM128 supported, GCM256 in progress)
> SMB direct(RDMA)               Partially Supported. SMB3 Multi-channel is required
>                                to connect to Windows client.
> SMB3 Multi-channel             Partially Supported.
> SMB3.1.1 POSIX extension       Supported.
> ACLs                           Partially Supported. only DACLs available, SACLs
>                                (auditing) is planned for the future. For
>                                ownership (SIDs) ksmbd generates random subauth
>                                values(then store it to disk) and use uid/gid
>                                get from inode as RID for local domain SID.
>                                The current acl implementation is limited to
>                                standalone server, not a domain member.
>                                Integration with Samba tools is being worked on to
>                                allow future support for running as a domain member.
> Kerberos                       Supported.
> Durable handle v1,v2           Planned for future.
> Persistent handle              Planned for future.
> SMB2 notify                    Planned for future.
> Sparse file support            Supported.
> DCE/RPC support                Partially Supported. a few calls(NetShareEnumAll,
>                                NetServerGetInfo, SAMR, LSARPC) that are needed
>                                for file server handled via netlink interface from
>                                ksmbd.mountd. Additional integration with Samba
>                                tools and libraries via upcall is being investigated
>                                to allow support for additional DCE/RPC management
>                                calls (and future support for Witness protocol e.g.)
> ksmbd/nfsd interoperability    Planned for future. The features that ksmbd
>                                support are Leases, Notify, ACLs and Share modes.
> ============================== =================================================
> 
> All features required as file server are currently implemented in ksmbd.
> In particular, the implementation of SMB Direct(RDMA) is only currently possible with ksmbd (among
> Linux servers)
> 
> 
> Stability
> =========
> 
> It has been proved to be stable. A significant amount of xfstests pass and are run regularly from
> Linux to Linux:
> 
>   http://smb3-test-rhel-75.southcentralus.cloudapp.azure.com/#/builders/8/builds/53

I missed updating test result in cover letter.

    http://smb3-test-rhel-75.southcentralus.cloudapp.azure.com/#/builders/8/builds/54

> 
> In addition regression tests using the broadest SMB3 functional test suite (Samba's "smbtorture") are
> run on every checkin.
> It has already been used by many other open source toolkits and commercial companies that need NAS
> functionality. Their issues have been fixed and contributions are applied into ksmbd. Ksmbd has been
> well tested and verified in the field and market.
> 
> 
> Mailing list and repositories
> =============================
>  - linux-cifs@xxxxxxxxxxxxxxx
>  - linux-cifsd-devel@xxxxxxxxxxxxxxxxxxxxx(old and deprecated)
>  - https://git.samba.org/?p=ksmbd.git;a=shortlog;h=refs/heads/cifsd-for-next
>  - https://github.com/smfrench/smb3-kernel/tree/cifsd-for-next
>  - https://github.com/namjaejeon/smb3-kernel/tree/ksmbd-v7-series
>  - https://github.com/cifsd-team/ksmbd (out-of-tree)
>  - https://github.com/cifsd-team/ksmbd-tools
> 
> 
> How to run ksmbd
> ================
> 
>    a. Download ksmbd-tools and compile them.
> 	- https://github.com/cifsd-team/ksmbd-tools
> 
>    b. Create user/password for SMB share.
> 
> 	# mkdir /etc/ksmbd/
> 	# ksmbd.adduser -a <Enter USERNAME for SMB share access>
> 
>    c. Create /etc/ksmbd/smb.conf file, add SMB share in smb.conf file
> 	- Refer smb.conf.example and Documentation/configuration.txt
> 	  in ksmbd-tools
> 
>    d. Insert ksmbd.ko module
> 
> 	# insmod ksmbd.ko
> 
>    e. Start ksmbd user space daemon
> 	# ksmbd.mountd
> 
>    f. Access share from Windows or Linux using SMB
>        e.g. "mount -t cifs //server/share /mnt ..."
> 
> 
> v7:
>  - fix wrong compression context size.
>  - fix wrong error status return on session setup.
>  - set STATUS_INVALID_PARAMETER error status if credit charge is
>    invalid.
>  - move credit charge verification over smb2 request size verification.
>  - fix typo of MS-SMBD.
>  - add negotiate context verification.
>  - add support for negotiating signing algorithm.
>  - Fix potential memory leak in tcp_destroy_socket(). (Marios Makassikis)
>  - fix -Wstringop-truncation warnings.
>  - Return STATUS_OBJECT_PATH_NOT_FOUND if smb2_creat() returns ENOENT. (Marios Makassikis)
>  - don't set RSS capable in FSCTL_QUERY_NETWORK_INTERFACE_INFO.
>  - use channel signingkey for binding SMB2 session setup.
>  - fix missing error code in smb2_lock.
>  - add ipv6_addr_v4mapped check to know if connection from client is ipv4.
>  - fix an oops in error handling in smb2_open(). (Dan Carpenter)
> 
> v6:
>  - Fix read on the uninitialized pointer sess. (Colin Ian King)
>  - call mnt_user_ns once in a function.
>  - remove unneeded NULL check in for_each_netdev. (Coverity Scan)
>  - fix read on the uninitialized send_ctx. (Coverity Scan)
>  - fix memory leak smb2_populate_readdir_entry(). (Coverity Scan)
>  - fix memory leak in smb_inherit_dacl(). (Coverity Scan)
>  - change data type of volatile/persistent id to u64. (Dan Carpenter)
>  - delete some stray tabs. (Dan Carpenter)
>  - use kasprintf() in ksmbd_vfs_xattr_stream_name(). (Dan Carpenter)
>  - fix the running request count decrement.
>  - free ksmbd_lock when file is closed.
>  - make smb2_find_context_vals return NULL if not found. (Dan Carpenter)
>  - handle error cases first in smb2_create_sd_buffers (Dan Carpenter)
>  - remove unneeded check_context_err. (Coverity Scan)
>  - fix memory leak in ksmbd_vfs_get_sd_xattr(). (Coverity Scan)
>  - fix unused err value in smb2_lock. (Coverity Scan)
>  - set RDMA capability for FSCTL_QUERY_NETWORK_INTERFACE_INFO.
>  - fix an error message in ksmbd_conn_trasnport_init.
>  - fix typo in comment.
> 
> v5:
>  - fix list_add double add BUG_ON trap in setup_async_work().
>  - set epoch in smb2_lease_break response.
>  - fix possible compile error for asn1.c.
>  - remove duplicated argument. (Wan Jiabing)
>  - append ksmbd prefix into names for asn1 decoder.
>  - fix kfree of uninitialized pointer oid. (Colin Ian King)
>  - add support for SMB3 multichannel.
>  - remove cache read/trans buffer support. (Christoph Hellwig)
>  - initialize variables on the declaration. (Christoph Hellwig)
>  - remove ksmbd_vfs_copy_file_range. (Christoph Hellwig)
>  - use list_for_each_entry instead of list_for_each. (Christoph Hellwig)
>  - use goto instead of duplicating the resoure cleanup in ksmbd_open_fd. (Christoph Hellwig)
>  - fix overly long line. (Christoph Hellwig)
>  - remove unneeded FIXME comment. (Christoph Hellwig)
>  - remove ____ksmbd_align in ksmbd_server.h. (Christoph Hellwig)
>  - replace KSMBD_SHARE_CONFIG_PATH with inline function. (Christoph Hellwig)
>  - remove ksmbd_err/info. (Christoph Hellwig)
>  - opencode to avoid trivial wrappers. (Christoph Hellwig)
>  - factor out a ksmbd_validate_entry_in_use helper from __ksmbd_vfs_rename. (Christoph Hellwig)
>  - opencode posix acl functions instead of wrappers. (Christoph Hellwig)
>  - change stream type macro to enumeration. (Christoph Hellwig)
>  - use f_bsize instead of q->limits.logical_block_size. (Christoph Hellwig)
>  - remove unneeded NULL check in the list iterator. (Dan Carpenter)
>  - use f_bsize in FS_SECTOR_SIZE_INFORMATION. (Christoph Hellwig)
>  - move fs/cifsd to fs/ksmbd. (Christoph Hellwig)
>  - factor out a ksmbd_vfs_lock_parent helper. (Christoph Hellwig)
>  - set MAY_* flags together with open flags. (Christoph Hellwig)
>  - reorder and document on-disk strctures and netlink structure in headers. (Christoph Hellwig)
>  - remove macros in transport_ipc.c.
>  - replace BUFFER_NR_PAGES with inline function.
>  - replace KSMBD_ALIGN with kernel ALIGN macro.
>  - replace PAYLOAD_HEAD with inline function.
>  - remove getting worker state macros.
>  - remove and replace macros with inline functions in smb_common.h. (Christoph Hellwig)
>  - replace SMB_DIRECT_TRANS macro with inline function. (Christoph Hellwig)
>  - replace request and respone buffer macro with inline functions. (Christoph Hellwig)
>  - allow PROTECTED_DACL_SECINFO and UNPROTECTED_DACL_SECINFO addition information.
>  - replace fp macros with inline functions.
>  - relax credit_charge check in smb2_validate_credit_charge(). (Marios Makassikis).
>  - add user namespace support. (Christoph Hellwig)
> 
> v4:
>  - add goto fail in asn1_oid_decode() (Dan Carpenter)
>  - use memcmp instead of for loop check in oid_eq(). (Dan Carpenter)
>  - add goto fail in neg_token_init_mech_type(). (Dan Carpenter)
>  - move fips_enabled check before the str_to_key(). (Dan Carpenter)
>  - just return smbhash() instead of using rc return value. (Dan Carpenter)
>  - move ret check before the out label. (Dan Carpenter)
>  - simplify error handling in ksmbd_auth_ntlm(). (Dan Carpenter)
>  - remove unneeded type casting. (Dan Carpenter)
>  - set error return value for memcmp() difference. (Dan Carpenter)
>  - return zero in always success case. (Dan Carpenter)
>  - never return 1 on failure. (Dan Carpenter)
>  - add the check if nvec is zero. (Dan Carpenter)
>  - len can never be negative in ksmbd_init_sg(). (Dan Carpenter)
>  - remove unneeded initialization of rc variable in ksmbd_crypt_message(). (Dan Carpenter)
>  - fix wrong return value in ksmbd_crypt_message(). (Dan Carpenter)
>  - change success handling to failure handling. (Dan Carpenter)
>  - add default case in switch statment in alloc_shash_desc().(Dan Carpenter)
>  - call kzalloc() directly instead of wrapper. (Dan Carpenter)
>  - simplify error handling in ksmbd_gen_preauth_integrity_hash(). (Dan Carpenter)
>  - return -ENOMEM about error from ksmbd_crypto_ctx_find_xxx calls. (Dan Carpenter)
>  - alignment match open parenthesis. (Dan Carpenter)
>  - add the check to prevent potential overflow with smb_strtoUTF16() and
>    UNICODE_LEN(). (Dan Carpenter)
>  - braces {} should be used on all arms of this statement.
>  - spaces preferred around that '/'.
>  - don't use multiple blank lines.
>  - No space is necessary after a cast.
>  - Blank lines aren't necessary after an open brace '{'.
>  - remove unnecessary parentheses around.
>  - Prefer kernel type 'u16' over 'uint16_t'.
>  - lookup a file with LOOKUP_FOLLOW only if 'follow symlinks = yes'.
>  - fix Control flow issues in ksmbd_build_ntlmssp_challenge_blob().
>  - fix memleak in ksmbd_vfs_stream_write(). (Yang Yingliang)
>  - fix memleak in ksmbd_vfs_stream_read(). (Yang Yingliang)
>  - check return value of ksmbd_vfs_getcasexattr() correctly.
>  - fix potential read overflow in ksmbd_vfs_stream_read().
> 
> v3:
>  - fix boolreturn.cocci warnings. (kernel test robot)
>  - fix xfstests generic/504 test failure.
>  - do not use 0 or 0xFFFFFFFF for TreeID. (Marios Makassikis)
>  - add support for FSCTL_DUPLICATE_EXTENTS_TO_FILE.
>  - fix build error without CONFIG_OID_REGISTRY. (Wei Yongjun)
>  - fix invalid memory access in smb2_write(). (Coverity Scan)
>  - add support for AES256 encryption.
>  - fix potential null-ptr-deref in destroy_previous_session(). (Marios Makassikis).
>  - update out_buf_len in smb2_populate_readdir_entry(). (Marios Makassikis)
>  - handle ksmbd_session_rpc_open() failure in create_smb2_pipe(). (Marios Makassikis)
>  - call smb2_set_err_rsp() in smb2_read/smb2_write error path. (Marios Makassikis)
>  - add ksmbd/nfsd interoperability to feature table. (Amir Goldstein)
>  - fix regression in smb2_get_info. (Sebastian Gottschall)
>  - remove is_attributes_write_allowed() wrapper. (Marios Makassikis)
>  - update access check in set_file_allocation_info/set_end_of_file_info. (Marios Makassikis)
> 
> v2:
>  - fix an error code in smb2_read(). (Dan Carpenter)
>  - fix error handling in ksmbd_server_init() (Dan Carpenter)
>  - remove redundant assignment to variable err. (Colin Ian King)
>  - remove unneeded macros.
>  - fix wrong use of rw semaphore in __session_create().
>  - use kmalloc() for small allocations.
>  - add the check to work file lock and rename behaviors like Windows
>    unless POSIX extensions are negotiated.
>  - clean-up codes using chechpatch.pl --strict.
>  - merge time_wrappers.h into smb_common.h.
>  - fix wrong prototype in comment (kernel test robot).
>  - fix implicit declaration of function 'groups_alloc' (kernel test robot).
>  - fix implicit declaration of function 'locks_alloc_lock' (kernel test robot).
>  - remove smack inherit leftovers.
>  - remove calling d_path in error paths.
>  - handle unhashed dentry in ksmbd_vfs_mkdir.
>  - use file_inode() instead of d_inode().
>  - remove useless error handling in ksmbd_vfs_read.
>  - use xarray instead of linked list for tree connect list.
>  - remove stale prototype and variables.
>  - fix memory leak when loop ends (coverity-bot, Muhammad Usama Anjum).
>  - use kfree to free memory allocated by kmalloc or kzalloc (Muhammad Usama Anjum).
>  - fix memdup.cocci warnings (kernel test robot)
>  - remove wrappers of kvmalloc/kvfree.
>  - change the reference to configuration.txt (Mauro Carvalho Chehab).
>  - prevent a integer overflow in wm_alloc().
>  - select SG_POOL for SMB_SERVER_SMBDIRECT. (Zhang Xiaoxu).
>  - remove unused including <linux/version.h> (Tian Tao).
>  - declare ida statically.
>  - add the check if parent is stable by unexpected rename.
>  - get parent dentry from child in ksmbd_vfs_remove_file().
>  - re-implement ksmbd_vfs_kern_path.
>  - fix reference count decrement of unclaimed file in __ksmbd_lookup_fd.
>  - remove smb2_put_name(). (Marios Makassikis).
>  - remove unused smberr.h, nterr.c and netmisc.c.
>  - fix potential null-ptr-deref in smb2_open() (Marios Makassikis).
>  - use d_inode().
>  - remove the dead code of unimplemented durable handle.
>  - use the generic one in lib/asn1_decoder.c
> 
> v1:
>  - fix a handful of spelling mistakes (Colin Ian King)
>  - fix a precedence bug in parse_dacl() (Dan Carpenter)
>  - fix a IS_ERR() vs NULL bug (Dan Carpenter)
>  - fix a use after free on error path  (Dan Carpenter)
>  - update cifsd.rst Documentation
>  - remove unneeded FIXME comments
>  - fix static checker warnings (Dan Carpenter)
>  - fix WARNING: unmet direct dependencies detected for CRYPTO_ARC4 (Randy Dunlap)
>  - uniquify extract_sharename() (Stephen Rothwell)
>  - fix WARNING: document isn't included in any toctree (Stephen Rothwell)
>  - fix WARNING: Title overline too short (Stephen Rothwell)
>  - fix warning: variable 'total_ace_size' and 'posix_ccontext'set but not used (kernel test rotbot)
>  - fix incorrect function comments (kernel test robot)
> 
> Namjae Jeon (13):
>   ksmbd: add document
>   ksmbd: add server handler
>   ksmbd: add tcp transport layer
>   ksmbd: add ipc transport layer
>   ksmbd: add rdma transport layer
>   ksmbd: add a utility code that tracks (and caches) sessions data
>   ksmbd: add authentication
>   ksmbd: add smb3 engine part 1
>   ksmbd: add smb3 engine part 2
>   ksmbd: add oplock/lease cache mechanism
>   ksmbd: add file operations
>   ksmbd: add Kconfig and Makefile
>   MAINTAINERS: add ksmbd kernel server
> 
>  Documentation/filesystems/cifs/index.rst |   10 +
>  Documentation/filesystems/cifs/ksmbd.rst |  164 +
>  Documentation/filesystems/index.rst      |    2 +-
>  MAINTAINERS                              |    9 +
>  fs/Kconfig                               |    1 +
>  fs/Makefile                              |    1 +
>  fs/ksmbd/Kconfig                         |   69 +
>  fs/ksmbd/Makefile                        |   20 +
>  fs/ksmbd/asn1.c                          |  343 +
>  fs/ksmbd/asn1.h                          |   21 +
>  fs/ksmbd/auth.c                          | 1364 ++++
>  fs/ksmbd/auth.h                          |   67 +
>  fs/ksmbd/connection.c                    |  413 ++
>  fs/ksmbd/connection.h                    |  213 +
>  fs/ksmbd/crypto_ctx.c                    |  282 +
>  fs/ksmbd/crypto_ctx.h                    |   74 +
>  fs/ksmbd/glob.h                          |   49 +
>  fs/ksmbd/ksmbd_netlink.h                 |  395 +
>  fs/ksmbd/ksmbd_spnego_negtokeninit.asn1  |   31 +
>  fs/ksmbd/ksmbd_spnego_negtokentarg.asn1  |   19 +
>  fs/ksmbd/ksmbd_work.c                    |   80 +
>  fs/ksmbd/ksmbd_work.h                    |  117 +
>  fs/ksmbd/mgmt/ksmbd_ida.c                |   46 +
>  fs/ksmbd/mgmt/ksmbd_ida.h                |   34 +
>  fs/ksmbd/mgmt/share_config.c             |  238 +
>  fs/ksmbd/mgmt/share_config.h             |   81 +
>  fs/ksmbd/mgmt/tree_connect.c             |  121 +
>  fs/ksmbd/mgmt/tree_connect.h             |   56 +
>  fs/ksmbd/mgmt/user_config.c              |   69 +
>  fs/ksmbd/mgmt/user_config.h              |   66 +
>  fs/ksmbd/mgmt/user_session.c             |  369 +
>  fs/ksmbd/mgmt/user_session.h             |  106 +
>  fs/ksmbd/misc.c                          |  338 +
>  fs/ksmbd/misc.h                          |   35 +
>  fs/ksmbd/ndr.c                           |  340 +
>  fs/ksmbd/ndr.h                           |   22 +
>  fs/ksmbd/nterr.h                         |  543 ++
>  fs/ksmbd/ntlmssp.h                       |  169 +
>  fs/ksmbd/oplock.c                        | 1709 +++++
>  fs/ksmbd/oplock.h                        |  131 +
>  fs/ksmbd/server.c                        |  633 ++
>  fs/ksmbd/server.h                        |   70 +
>  fs/ksmbd/smb2misc.c                      |  438 ++
>  fs/ksmbd/smb2ops.c                       |  312 +
>  fs/ksmbd/smb2pdu.c                       | 8364 ++++++++++++++++++++++
>  fs/ksmbd/smb2pdu.h                       | 1698 +++++
>  fs/ksmbd/smb_common.c                    |  655 ++
>  fs/ksmbd/smb_common.h                    |  543 ++
>  fs/ksmbd/smbacl.c                        | 1344 ++++
>  fs/ksmbd/smbacl.h                        |  212 +
>  fs/ksmbd/smbfsctl.h                      |   91 +
>  fs/ksmbd/smbstatus.h                     | 1822 +++++
>  fs/ksmbd/transport_ipc.c                 |  874 +++
>  fs/ksmbd/transport_ipc.h                 |   47 +
>  fs/ksmbd/transport_rdma.c                | 2057 ++++++
>  fs/ksmbd/transport_rdma.h                |   63 +
>  fs/ksmbd/transport_tcp.c                 |  618 ++
>  fs/ksmbd/transport_tcp.h                 |   13 +
>  fs/ksmbd/unicode.c                       |  384 +
>  fs/ksmbd/unicode.h                       |  357 +
>  fs/ksmbd/uniupr.h                        |  268 +
>  fs/ksmbd/vfs.c                           | 1886 +++++
>  fs/ksmbd/vfs.h                           |  197 +
>  fs/ksmbd/vfs_cache.c                     |  725 ++
>  fs/ksmbd/vfs_cache.h                     |  178 +
>  fs/ksmbd/xattr.h                         |  122 +
>  66 files changed, 32187 insertions(+), 1 deletion(-)  create mode 100644
> Documentation/filesystems/cifs/index.rst
>  create mode 100644 Documentation/filesystems/cifs/ksmbd.rst
>  create mode 100644 fs/ksmbd/Kconfig
>  create mode 100644 fs/ksmbd/Makefile
>  create mode 100644 fs/ksmbd/asn1.c
>  create mode 100644 fs/ksmbd/asn1.h
>  create mode 100644 fs/ksmbd/auth.c
>  create mode 100644 fs/ksmbd/auth.h
>  create mode 100644 fs/ksmbd/connection.c  create mode 100644 fs/ksmbd/connection.h  create mode 100644
> fs/ksmbd/crypto_ctx.c  create mode 100644 fs/ksmbd/crypto_ctx.h  create mode 100644 fs/ksmbd/glob.h
> create mode 100644 fs/ksmbd/ksmbd_netlink.h  create mode 100644
> fs/ksmbd/ksmbd_spnego_negtokeninit.asn1
>  create mode 100644 fs/ksmbd/ksmbd_spnego_negtokentarg.asn1
>  create mode 100644 fs/ksmbd/ksmbd_work.c  create mode 100644 fs/ksmbd/ksmbd_work.h  create mode 100644
> fs/ksmbd/mgmt/ksmbd_ida.c  create mode 100644 fs/ksmbd/mgmt/ksmbd_ida.h  create mode 100644
> fs/ksmbd/mgmt/share_config.c  create mode 100644 fs/ksmbd/mgmt/share_config.h  create mode 100644
> fs/ksmbd/mgmt/tree_connect.c  create mode 100644 fs/ksmbd/mgmt/tree_connect.h  create mode 100644
> fs/ksmbd/mgmt/user_config.c  create mode 100644 fs/ksmbd/mgmt/user_config.h  create mode 100644
> fs/ksmbd/mgmt/user_session.c  create mode 100644 fs/ksmbd/mgmt/user_session.h  create mode 100644
> fs/ksmbd/misc.c  create mode 100644 fs/ksmbd/misc.h  create mode 100644 fs/ksmbd/ndr.c  create mode
> 100644 fs/ksmbd/ndr.h  create mode 100644 fs/ksmbd/nterr.h  create mode 100644 fs/ksmbd/ntlmssp.h
> create mode 100644 fs/ksmbd/oplock.c  create mode 100644 fs/ksmbd/oplock.h  create mode 100644
> fs/ksmbd/server.c  create mode 100644 fs/ksmbd/server.h  create mode 100644 fs/ksmbd/smb2misc.c  create
> mode 100644 fs/ksmbd/smb2ops.c  create mode 100644 fs/ksmbd/smb2pdu.c  create mode 100644
> fs/ksmbd/smb2pdu.h  create mode 100644 fs/ksmbd/smb_common.c  create mode 100644 fs/ksmbd/smb_common.h
> create mode 100644 fs/ksmbd/smbacl.c  create mode 100644 fs/ksmbd/smbacl.h  create mode 100644
> fs/ksmbd/smbfsctl.h  create mode 100644 fs/ksmbd/smbstatus.h  create mode 100644
> fs/ksmbd/transport_ipc.c  create mode 100644 fs/ksmbd/transport_ipc.h  create mode 100644
> fs/ksmbd/transport_rdma.c  create mode 100644 fs/ksmbd/transport_rdma.h  create mode 100644
> fs/ksmbd/transport_tcp.c  create mode 100644 fs/ksmbd/transport_tcp.h  create mode 100644
> fs/ksmbd/unicode.c  create mode 100644 fs/ksmbd/unicode.h  create mode 100644 fs/ksmbd/uniupr.h  create
> mode 100644 fs/ksmbd/vfs.c  create mode 100644 fs/ksmbd/vfs.h  create mode 100644 fs/ksmbd/vfs_cache.c
> create mode 100644 fs/ksmbd/vfs_cache.h  create mode 100644 fs/ksmbd/xattr.h
> 
> --
> 2.17.1