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Fri, 21 May 2021 06:35:49 +0000 (GMT) From: Namjae Jeon To: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-cifs@vger.kernel.org Cc: linux-cifsd-devel@lists.sourceforge.net, smfrench@gmail.com, senozhatsky@chromium.org, hyc.lee@gmail.com, viro@zeniv.linux.org.uk, hch@lst.de, hch@infradead.org, ronniesahlberg@gmail.com, aurelien.aptel@gmail.com, aaptel@suse.com, sandeen@sandeen.net, dan.carpenter@oracle.com, willy@infradead.org, Namjae Jeon Subject: [PATCH v3 00/10] cifsd: introduce new SMB3 kernel server Date: Fri, 21 May 2021 15:26:27 +0900 Message-Id: <20210521062637.31347-1-namjae.jeon@samsung.com> X-Mailer: git-send-email 2.17.1 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFprDJsWRmVeSWpSXmKPExsWy7bCmvu6xkOUJBh0HpS0a355msTj++i+7 xet/01ksTk9YxGSxcvVRJotr99+zW7z4v4vZ4uf/74wWe/aeZLG4vGsOm8WP6fUWvX2fWC1a r2hZ7N64iM3izYvDbBbn/x5ntfj9Yw6bg6DH7IaLLB47Z91l99i8Qstj94LPTB67bzaweXx8 eovFo2/LKkaPLYsfMnms33KVxePzJjmPTU/eMgVwR+XYZKQmpqQWKaTmJeenZOal2yp5B8c7 x5uaGRjqGlpamCsp5CXmptoqufgE6Lpl5gD9pKRQlphTChQKSCwuVtK3synKLy1JVcjILy6x VUotSMkpMDQo0CtOzC0uzUvXS87PtTI0MDAyBapMyMm4tWcje8HhKYwVU1ZdZWpg7MrqYuTg kBAwkbi1NK6LkYtDSGAHo8SqWXPZIJxPjBInf3xihXA+M0r8vr6HvYuRE6xj3qbpTCC2kMAu Romv5xjhOk4c+8EEMpZNQFvizxZRkBoRgViJGzteM4PUMAvcY5KY/62XBSQhLOAo8al5DiuI zSKgKrH33H2wobwCNhKfPr5nhlgmL7F6wwGwZgmBpRwSz960skIkXCQaP4DcCmILS7w6vgXq OimJl/1tUHa5xImTv5gg7BqJDfP2sUP8bCzR86IExGQW0JRYv0sfokJRYufvuYwgNrMAn8S7 rz2sENW8Eh1tQhAlqhJ9lw5DDZSW6Gr/ALXIQ+J18wxmSJDEShz+u4hpAqPsLIQFCxgZVzGK pRYU56anFhsWGCLH0SZGcDLVMt3BOPHtB71DjEwcjIcYJTiYlUR4uR2XJwjxpiRWVqUW5ccX leakFh9iNAUG10RmKdHkfGA6zyuJNzQ1MjY2tjAxMzczNVYS5013rk4QEkhPLEnNTk0tSC2C 6WPi4JRqYJp566u128TZj5auZWnp6N3TvCvgf8B9j5Jl0Ydtlj6XDrXNKNU9eEizYlf0jHW7 +f94VpnN5Ja4ahT2eoLImnlrffNy/+50DFZZd+YP61GBPUGWbRO2J6kWddz/+Ltysq7Pg6YD Z3kvfF58f8vl7Flzvx7f8txPMPIZM0ul5PpP60sOcWvM9rWpqp7pwX5Y0vViSeOTNubLLUZi vQ7LLZ/xOh8QPrmaZ1X9lB/uUxPmGex6I/Pr0yf+8zWTSiL+P9H1ikndbMylUs589cPqO9wb Dp19ZDmrS/VSh3D50ywRgY2dlrdXXly079YWoacXtvHMStO7aXE4c/OzILfftvk1J54VCKye +TM0PE16bp6rEktxRqKhFnNRcSIAY6CR8S8EAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrNLMWRmVeSWpSXmKPExsWy7bCSnO7RkOUJBlvvGlg0vj3NYnH89V92 i9f/prNYnJ6wiMli5eqjTBbX7r9nt3jxfxezxc//3xkt9uw9yWJxedccNosf0+stevs+sVq0 XtGy2L1xEZvFmxeH2SzO/z3OavH7xxw2B0GP2Q0XWTx2zrrL7rF5hZbH7gWfmTx232xg8/j4 9BaLR9+WVYweWxY/ZPJYv+Uqi8fnTXIem568ZQrgjuKySUnNySxLLdK3S+DKuLVnI3vB4SmM FVNWXWVqYOzK6mLk5JAQMJGYt2k6UxcjF4eQwA5GifuL+xghEtISx06cYe5i5ACyhSUOHy6G qPnAKLFr7S12kDibgLbEny2iIOUiAvESNxtus4DYzALvmCSuXMsBsYUFHCU+Nc9hBbFZBFQl 9p67zwRi8wrYSHz6+J4ZYpW8xOoNB5gnMPIsYGRYxSiZWlCcm55bbFhglJdarlecmFtcmpeu l5yfu4kRHN5aWjsY96z6oHeIkYmD8RCjBAezkggvt+PyBCHelMTKqtSi/Pii0pzU4kOM0hws SuK8F7pOxgsJpCeWpGanphakFsFkmTg4pRqYtrxsv33wqdRDR6nzC5t6jnAc6XgaJzu7aHpe T+RLyz2bbzpskFIUb7tY86Lg/DveK6Xp8oLq3t5PZPx2/1osb+fCsr88QCKlLei0i6D77dKr Orxzr8eknDjx//bC7Y+nPuvVMlf6vP3bA5MFnd7b1hRrbT7LI24cZMj08lAe4/32j0XfzDkV f96R0J4nEjs1Qn1PjfnPe2nBliW+OjtXni/QUzu1c0NMmb1SFkPM8hmxrre5JlgIOft+azAM bGcwii2KVdpppyGyvO3IUeGap0oiMibnPkl6icUdMFr1Z+ch/wrrc+bf1LewzJTdK1CQE2q9 6m7pnVjPk44pwdJN3+rc9O8s/L84zMlqF78SS3FGoqEWc1FxIgAwbSa+3gIAAA== X-CMS-MailID: 20210521063549epcas1p204e171a2ba5a06d1b50e490f5e742b25 X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" X-Sendblock-Type: SVC_REQ_APPROVE CMS-TYPE: 101P DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20210521063549epcas1p204e171a2ba5a06d1b50e490f5e742b25 References: Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org This is the patch series for cifsd(ksmbd) kernel server. What is cifsd(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 In Progress. 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/36 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-cifsd-devel@lists.sourceforge.net - https://github.com/smfrench/smb3-kernel/tree/cifsd-for-next - https://github.com/cifsd-team/cifsd (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 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 ..." 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 (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 (10): cifsd: add document cifsd: add server handler cifsd: add trasport layers cifsd: add authentication cifsd: add smb3 engine part 1 cifsd: add smb3 engine part 2 cifsd: add oplock/lease cache mechanism cifsd: add file operations cifsd: add Kconfig and Makefile MAINTAINERS: add cifsd kernel server Documentation/filesystems/cifs/cifsd.rst | 164 + Documentation/filesystems/cifs/index.rst | 10 + Documentation/filesystems/index.rst | 2 +- MAINTAINERS | 12 +- fs/Kconfig | 1 + fs/Makefile | 1 + fs/cifsd/Kconfig | 68 + fs/cifsd/Makefile | 17 + fs/cifsd/asn1.c | 352 + fs/cifsd/asn1.h | 29 + fs/cifsd/auth.c | 1344 ++++ fs/cifsd/auth.h | 90 + fs/cifsd/buffer_pool.c | 264 + fs/cifsd/buffer_pool.h | 20 + fs/cifsd/connection.c | 411 ++ fs/cifsd/connection.h | 208 + fs/cifsd/crypto_ctx.c | 286 + fs/cifsd/crypto_ctx.h | 77 + fs/cifsd/glob.h | 64 + fs/cifsd/ksmbd_server.h | 283 + fs/cifsd/ksmbd_work.c | 93 + fs/cifsd/ksmbd_work.h | 110 + fs/cifsd/mgmt/ksmbd_ida.c | 46 + fs/cifsd/mgmt/ksmbd_ida.h | 34 + fs/cifsd/mgmt/share_config.c | 239 + fs/cifsd/mgmt/share_config.h | 81 + fs/cifsd/mgmt/tree_connect.c | 122 + fs/cifsd/mgmt/tree_connect.h | 56 + fs/cifsd/mgmt/user_config.c | 70 + fs/cifsd/mgmt/user_config.h | 66 + fs/cifsd/mgmt/user_session.c | 328 + fs/cifsd/mgmt/user_session.h | 103 + fs/cifsd/misc.c | 340 + fs/cifsd/misc.h | 44 + fs/cifsd/ndr.c | 347 + fs/cifsd/ndr.h | 21 + fs/cifsd/nterr.h | 545 ++ fs/cifsd/ntlmssp.h | 169 + fs/cifsd/oplock.c | 1667 +++++ fs/cifsd/oplock.h | 133 + fs/cifsd/server.c | 631 ++ fs/cifsd/server.h | 60 + fs/cifsd/smb2misc.c | 435 ++ fs/cifsd/smb2ops.c | 300 + fs/cifsd/smb2pdu.c | 8151 ++++++++++++++++++++++ fs/cifsd/smb2pdu.h | 1664 +++++ fs/cifsd/smb_common.c | 652 ++ fs/cifsd/smb_common.h | 544 ++ fs/cifsd/smbacl.c | 1317 ++++ fs/cifsd/smbacl.h | 201 + fs/cifsd/smbfsctl.h | 91 + fs/cifsd/smbstatus.h | 1822 +++++ fs/cifsd/spnego_negtokeninit.asn1 | 43 + fs/cifsd/spnego_negtokentarg.asn1 | 19 + fs/cifsd/transport_ipc.c | 881 +++ fs/cifsd/transport_ipc.h | 54 + fs/cifsd/transport_rdma.c | 2034 ++++++ fs/cifsd/transport_rdma.h | 61 + fs/cifsd/transport_tcp.c | 618 ++ fs/cifsd/transport_tcp.h | 13 + fs/cifsd/unicode.c | 383 + fs/cifsd/unicode.h | 356 + fs/cifsd/uniupr.h | 268 + fs/cifsd/vfs.c | 1995 ++++++ fs/cifsd/vfs.h | 274 + fs/cifsd/vfs_cache.c | 683 ++ fs/cifsd/vfs_cache.h | 185 + 67 files changed, 32050 insertions(+), 2 deletions(-) create mode 100644 Documentation/filesystems/cifs/cifsd.rst create mode 100644 Documentation/filesystems/cifs/index.rst create mode 100644 fs/cifsd/Kconfig create mode 100644 fs/cifsd/Makefile create mode 100644 fs/cifsd/asn1.c create mode 100644 fs/cifsd/asn1.h create mode 100644 fs/cifsd/auth.c create mode 100644 fs/cifsd/auth.h create mode 100644 fs/cifsd/buffer_pool.c create mode 100644 fs/cifsd/buffer_pool.h create mode 100644 fs/cifsd/connection.c create mode 100644 fs/cifsd/connection.h create mode 100644 fs/cifsd/crypto_ctx.c create mode 100644 fs/cifsd/crypto_ctx.h create mode 100644 fs/cifsd/glob.h create mode 100644 fs/cifsd/ksmbd_server.h create mode 100644 fs/cifsd/ksmbd_work.c create mode 100644 fs/cifsd/ksmbd_work.h create mode 100644 fs/cifsd/mgmt/ksmbd_ida.c create mode 100644 fs/cifsd/mgmt/ksmbd_ida.h create mode 100644 fs/cifsd/mgmt/share_config.c create mode 100644 fs/cifsd/mgmt/share_config.h create mode 100644 fs/cifsd/mgmt/tree_connect.c create mode 100644 fs/cifsd/mgmt/tree_connect.h create mode 100644 fs/cifsd/mgmt/user_config.c create mode 100644 fs/cifsd/mgmt/user_config.h create mode 100644 fs/cifsd/mgmt/user_session.c create mode 100644 fs/cifsd/mgmt/user_session.h create mode 100644 fs/cifsd/misc.c create mode 100644 fs/cifsd/misc.h create mode 100644 fs/cifsd/ndr.c create mode 100644 fs/cifsd/ndr.h create mode 100644 fs/cifsd/nterr.h create mode 100644 fs/cifsd/ntlmssp.h create mode 100644 fs/cifsd/oplock.c create mode 100644 fs/cifsd/oplock.h create mode 100644 fs/cifsd/server.c create mode 100644 fs/cifsd/server.h create mode 100644 fs/cifsd/smb2misc.c create mode 100644 fs/cifsd/smb2ops.c create mode 100644 fs/cifsd/smb2pdu.c create mode 100644 fs/cifsd/smb2pdu.h create mode 100644 fs/cifsd/smb_common.c create mode 100644 fs/cifsd/smb_common.h create mode 100644 fs/cifsd/smbacl.c create mode 100644 fs/cifsd/smbacl.h create mode 100644 fs/cifsd/smbfsctl.h create mode 100644 fs/cifsd/smbstatus.h create mode 100644 fs/cifsd/spnego_negtokeninit.asn1 create mode 100644 fs/cifsd/spnego_negtokentarg.asn1 create mode 100644 fs/cifsd/transport_ipc.c create mode 100644 fs/cifsd/transport_ipc.h create mode 100644 fs/cifsd/transport_rdma.c create mode 100644 fs/cifsd/transport_rdma.h create mode 100644 fs/cifsd/transport_tcp.c create mode 100644 fs/cifsd/transport_tcp.h create mode 100644 fs/cifsd/unicode.c create mode 100644 fs/cifsd/unicode.h create mode 100644 fs/cifsd/uniupr.h create mode 100644 fs/cifsd/vfs.c create mode 100644 fs/cifsd/vfs.h create mode 100644 fs/cifsd/vfs_cache.c create mode 100644 fs/cifsd/vfs_cache.h -- 2.17.1