Commit | Line | Data |
---|---|---|
6473a559 | 1 | Version 1.39 November 30, 2005 |
1da177e4 LT |
2 | |
3 | A Partial List of Missing Features | |
4 | ================================== | |
5 | ||
6 | Contributions are welcome. There are plenty of opportunities | |
7 | for visible, important contributions to this module. Here | |
8 | is a partial list of the known problems and missing features: | |
9 | ||
9a899e76 SF |
10 | a) Support for SecurityDescriptors(Windows/CIFS ACLs) for chmod/chgrp/chown |
11 | so that these operations can be supported to Windows servers | |
1da177e4 | 12 | |
9a899e76 SF |
13 | b) Mapping POSIX ACLs (and eventually NFSv4 ACLs) to CIFS |
14 | SecurityDescriptors | |
1da177e4 | 15 | |
9a899e76 SF |
16 | c) Better pam/winbind integration (e.g. to handle uid mapping |
17 | better) | |
1da177e4 LT |
18 | |
19 | d) Kerberos/SPNEGO session setup support - (started) | |
20 | ||
21 | e) NTLMv2 authentication (mostly implemented) | |
22 | ||
23 | f) MD5-HMAC signing SMB PDUs when SPNEGO style SessionSetup | |
24 | used (Kerberos or NTLMSSP). Signing alreadyimplemented for NTLM | |
25 | and raw NTLMSSP already. This is important when enabling | |
26 | extended security and mounting to Windows 2003 Servers | |
27 | ||
28 | f) Directory entry caching relies on a 1 second timer, rather than | |
29 | using FindNotify or equivalent. - (started) | |
30 | ||
31 | g) A few byte range testcases fail due to POSIX vs. Windows/CIFS | |
9a899e76 SF |
32 | style byte range lock differences. Save byte range locks so |
33 | reconnect can replay them. | |
1da177e4 | 34 | |
9a899e76 SF |
35 | h) Support unlock all (unlock 0,MAX_OFFSET) |
36 | by unlocking all known byte range locks that we locked on the file. | |
37 | ||
38 | i) quota support (needs minor kernel change since quota calls | |
39 | to make it to network filesystems or deviceless filesystems) | |
1da177e4 | 40 | |
190fdeb8 SF |
41 | j) investigate sync behavior (including syncpage) and check |
42 | for proper behavior of intr/nointr | |
1da177e4 LT |
43 | |
44 | k) hook lower into the sockets api (as NFS/SunRPC does) to avoid the | |
45 | extra copy in/out of the socket buffers in some cases. | |
46 | ||
47 | l) finish support for IPv6. This is mostly complete but | |
48 | needs a simple conversion of ipv6 to sin6_addr from the | |
49 | address in string representation. | |
50 | ||
51 | m) Better optimize open (and pathbased setfilesize) to reduce the | |
52 | oplock breaks coming from windows srv. Piggyback identical file | |
53 | opens on top of each other by incrementing reference count rather | |
54 | than resending (helps reduce server resource utilization and avoid | |
55 | spurious oplock breaks). | |
56 | ||
57 | o) Improve performance of readpages by sending more than one read | |
58 | at a time when 8 pages or more are requested. In conjuntion | |
59 | add support for async_cifs_readpages. | |
60 | ||
6473a559 | 61 | p) Add support for storing symlink info to Windows servers |
1da177e4 LT |
62 | in the Extended Attribute format their SFU clients would recognize. |
63 | ||
64 | q) Finish fcntl D_NOTIFY support so kde and gnome file list windows | |
9a899e76 SF |
65 | will autorefresh (partially complete by Asser). Needs minor kernel |
66 | vfs change to support removing D_NOTIFY on a file. | |
1da177e4 LT |
67 | |
68 | r) Add GUI tool to configure /proc/fs/cifs settings and for display of | |
69 | the CIFS statistics (started) | |
70 | ||
9a899e76 | 71 | s) implement support for security and trusted categories of xattrs |
1da177e4 LT |
72 | (requires minor protocol extension) to enable better support for SELINUX |
73 | ||
9a899e76 | 74 | t) Implement O_DIRECT flag on open (already supported on mount) |
737b758c | 75 | |
9a899e76 | 76 | u) Create UID mapping facility so server UIDs can be mapped on a per |
9ea1f8f5 SF |
77 | mount or a per server basis to client UIDs or nobody if no mapping |
78 | exists. This is helpful when Unix extensions are negotiated to | |
79 | allow better permission checking when UIDs differ on the server | |
80 | and client. Add new protocol request to the CIFS protocol | |
81 | standard for asking the server for the corresponding name of a | |
82 | particular uid. | |
83 | ||
9a899e76 SF |
84 | v) Add support for CIFS Unix and also the newer POSIX extensions to the |
85 | server side for Samba 4. | |
86 | ||
87 | w) Finish up the dos time conversion routines needed to return old server | |
88 | time to the client (default time, of now or time 0 is used now for these | |
89 | very old servers) | |
90 | ||
91 | x) Add support for OS/2 (LANMAN 1.2 and LANMAN2.1 based SMB servers) | |
92 | ||
93 | y) Finish testing of Windows 9x/Windows ME server support (started). | |
94 | ||
9ea1f8f5 | 95 | KNOWN BUGS (updated April 29, 2005) |
1da177e4 | 96 | ==================================== |
6a0b4824 SF |
97 | See http://bugzilla.samba.org - search on product "CifsVFS" for |
98 | current bug list. | |
99 | ||
1da177e4 LT |
100 | 1) existing symbolic links (Windows reparse points) are recognized but |
101 | can not be created remotely. They are implemented for Samba and those that | |
6a0b4824 SF |
102 | support the CIFS Unix extensions, although earlier versions of Samba |
103 | overly restrict the pathnames. | |
1da177e4 LT |
104 | 2) follow_link and readdir code does not follow dfs junctions |
105 | but recognizes them | |
106 | 3) create of new files to FAT partitions on Windows servers can | |
107 | succeed but still return access denied (appears to be Windows | |
108 | server not cifs client problem) and has not been reproduced recently. | |
109 | NTFS partitions do not have this problem. | |
110 | 4) debug connectathon lock test case 10 which fails against | |
111 | Samba (may be unmappable due to POSIX to Windows lock model | |
112 | differences but worth investigating). Also debug Samba to | |
113 | see why lock test case 7 takes longer to complete to Samba | |
114 | than to Windows. | |
115 | ||
116 | Misc testing to do | |
117 | ================== | |
118 | 1) check out max path names and max path name components against various server | |
119 | types. Try nested symlinks (8 deep). Return max path name in stat -f information | |
120 | ||
121 | 2) Modify file portion of ltp so it can run against a mounted network | |
122 | share and run it against cifs vfs. | |
123 | ||
124 | 3) Additional performance testing and optimization using iozone and similar - | |
125 | there are some easy changes that can be done to parallelize sequential writes, | |
126 | and when signing is disabled to request larger read sizes (larger than | |
127 | negotiated size) and send larger write sizes to modern servers. | |
128 | ||
6a0b4824 SF |
129 | 4) More exhaustively test against less common servers. More testing |
130 | against Windows 9x, Windows ME servers. |