^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) ====
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) TODO
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) ====
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) Version 2.14 December 21, 2018
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) A Partial List of Missing Features
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) ==================================
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) Contributions are welcome. There are plenty of opportunities
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) for visible, important contributions to this module. Here
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) is a partial list of the known problems and missing features:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) a) SMB3 (and SMB3.1.1) missing optional features:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) - multichannel (started), integration with RDMA
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) - directory leases (improved metadata caching), started (root dir only)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) - T10 copy offload ie "ODX" (copy chunk, and "Duplicate Extents" ioctl
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) currently the only two server side copy mechanisms supported)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) b) improved sparse file support (fiemap and SEEK_HOLE are implemented
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) but additional features would be supportable by the protocol).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) c) Directory entry caching relies on a 1 second timer, rather than
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) using Directory Leases, currently only the root file handle is cached longer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) d) quota support (needs minor kernel change since quota calls
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) to make it to network filesystems or deviceless filesystems)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) e) Additional use cases can be optimized to use "compounding" (e.g.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) open/query/close and open/setinfo/close) to reduce the number of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) roundtrips to the server and improve performance. Various cases
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) (stat, statfs, create, unlink, mkdir) already have been improved by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) using compounding but more can be done. In addition we could
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) significantly reduce redundant opens by using deferred close (with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) handle caching leases) and better using reference counters on file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) handles.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) f) Finish inotify support so kde and gnome file list windows
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) will autorefresh (partially complete by Asser). Needs minor kernel
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) vfs change to support removing D_NOTIFY on a file.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) g) Add GUI tool to configure /proc/fs/cifs settings and for display of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) the CIFS statistics (started)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) h) implement support for security and trusted categories of xattrs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) (requires minor protocol extension) to enable better support for SELINUX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) i) Add support for tree connect contexts (see MS-SMB2) a new SMB3.1.1 protocol
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) feature (may be especially useful for virtualization).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) j) Create UID mapping facility so server UIDs can be mapped on a per
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) mount or a per server basis to client UIDs or nobody if no mapping
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) exists. Also better integration with winbind for resolving SID owners
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) k) Add tools to take advantage of more smb3 specific ioctls and features
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) (passthrough ioctl/fsctl is now implemented in cifs.ko to allow
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) sending various SMB3 fsctls and query info and set info calls
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) directly from user space) Add tools to make setting various non-POSIX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) metadata attributes easier from tools (e.g. extending what was done
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) in smb-info tool).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) l) encrypted file support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) m) improved stats gathering tools (perhaps integration with nfsometer?)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) to extend and make easier to use what is currently in /proc/fs/cifs/Stats
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) n) Add support for claims based ACLs ("DAC")
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) o) mount helper GUI (to simplify the various configuration options on mount)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) p) Add support for witness protocol (perhaps ioctl to cifs.ko from user space
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) tool listening on witness protocol RPC) to allow for notification of share
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) move, server failover, and server adapter changes. And also improve other
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) failover scenarios, e.g. when client knows multiple DFS entries point to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) different servers, and the server we are connected to has gone down.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) q) Allow mount.cifs to be more verbose in reporting errors with dialect
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) or unsupported feature errors.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) r) updating cifs documentation, and user guide.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) s) Addressing bugs found by running a broader set of xfstests in standard
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) file system xfstest suite.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) t) split cifs and smb3 support into separate modules so legacy (and less
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) secure) CIFS dialect can be disabled in environments that don't need it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) and simplify the code.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) v) POSIX Extensions for SMB3.1.1 (started, create and mkdir support added
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) so far).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) w) Add support for additional strong encryption types, and additional spnego
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) authentication mechanisms (see MS-SMB2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) x) Finish support for SMB3.1.1 compression
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) Known Bugs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) ==========
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) See https://bugzilla.samba.org - search on product "CifsVFS" for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) current bug list. Also check http://bugzilla.kernel.org (Product = File System, Component = CIFS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 1) existing symbolic links (Windows reparse points) are recognized but
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) can not be created remotely. They are implemented for Samba and those that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) support the CIFS Unix extensions, although earlier versions of Samba
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) overly restrict the pathnames.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 2) follow_link and readdir code does not follow dfs junctions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) but recognizes them
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) Misc testing to do
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) ==================
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 1) check out max path names and max path name components against various server
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) types. Try nested symlinks (8 deep). Return max path name in stat -f information
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 2) Improve xfstest's cifs/smb3 enablement and adapt xfstests where needed to test
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) cifs/smb3 better
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 3) Additional performance testing and optimization using iozone and similar -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) there are some easy changes that can be done to parallelize sequential writes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) and when signing is disabled to request larger read sizes (larger than
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) negotiated size) and send larger write sizes to modern servers.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 4) More exhaustively test against less common servers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 5) Continue to extend the smb3 "buildbot" which does automated xfstesting
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) against Windows, Samba and Azure currently - to add additional tests and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) to allow the buildbot to execute the tests faster. The URL for the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) buildbot is: http://smb3-test-rhel-75.southcentralus.cloudapp.azure.com
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 6) Address various coverity warnings (most are not bugs per-se, but
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) the more warnings are addressed, the easier it is to spot real
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) problems that static analyzers will point out in the future).
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
3 Commits
0 Branches
0 Tags