Commit | Line | Data |
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f6d09982 | 1 | Version 1.52 January 3, 2008 |
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 | 18 | |
f6d09982 | 19 | d) Cleanup now unneeded SessSetup code in |
b609f06a SF |
20 | fs/cifs/connect.c and add back in NTLMSSP code if any servers |
21 | need it | |
1da177e4 | 22 | |
f6d09982 SF |
23 | e) ms-dfs and ms-dfs host name resolution cleanup |
24 | ||
25 | f) fix NTLMv2 signing when two mounts with different users to same | |
26 | server. | |
1da177e4 | 27 | |
deb0420c | 28 | g) Directory entry caching relies on a 1 second timer, rather than |
1da177e4 LT |
29 | using FindNotify or equivalent. - (started) |
30 | ||
deb0420c | 31 | h) quota support (needs minor kernel change since quota calls |
9a899e76 | 32 | to make it to network filesystems or deviceless filesystems) |
1da177e4 | 33 | |
deb0420c | 34 | i) investigate sync behavior (including syncpage) and check |
190fdeb8 | 35 | for proper behavior of intr/nointr |
1da177e4 | 36 | |
deb0420c | 37 | j) hook lower into the sockets api (as NFS/SunRPC does) to avoid the |
1da177e4 LT |
38 | extra copy in/out of the socket buffers in some cases. |
39 | ||
deb0420c | 40 | k) Better optimize open (and pathbased setfilesize) to reduce the |
1da177e4 LT |
41 | oplock breaks coming from windows srv. Piggyback identical file |
42 | opens on top of each other by incrementing reference count rather | |
43 | than resending (helps reduce server resource utilization and avoid | |
44 | spurious oplock breaks). | |
45 | ||
deb0420c | 46 | l) Improve performance of readpages by sending more than one read |
1da177e4 LT |
47 | at a time when 8 pages or more are requested. In conjuntion |
48 | add support for async_cifs_readpages. | |
49 | ||
deb0420c | 50 | m) Add support for storing symlink info to Windows servers |
1da177e4 LT |
51 | in the Extended Attribute format their SFU clients would recognize. |
52 | ||
deb0420c | 53 | n) Finish fcntl D_NOTIFY support so kde and gnome file list windows |
9a899e76 SF |
54 | will autorefresh (partially complete by Asser). Needs minor kernel |
55 | vfs change to support removing D_NOTIFY on a file. | |
1da177e4 | 56 | |
deb0420c | 57 | o) Add GUI tool to configure /proc/fs/cifs settings and for display of |
1da177e4 LT |
58 | the CIFS statistics (started) |
59 | ||
deb0420c | 60 | p) implement support for security and trusted categories of xattrs |
1da177e4 LT |
61 | (requires minor protocol extension) to enable better support for SELINUX |
62 | ||
deb0420c | 63 | q) Implement O_DIRECT flag on open (already supported on mount) |
737b758c | 64 | |
deb0420c | 65 | r) Create UID mapping facility so server UIDs can be mapped on a per |
9ea1f8f5 SF |
66 | mount or a per server basis to client UIDs or nobody if no mapping |
67 | exists. This is helpful when Unix extensions are negotiated to | |
68 | allow better permission checking when UIDs differ on the server | |
69 | and client. Add new protocol request to the CIFS protocol | |
70 | standard for asking the server for the corresponding name of a | |
71 | particular uid. | |
72 | ||
deb0420c | 73 | s) Add support for CIFS Unix and also the newer POSIX extensions to the |
9a899e76 SF |
74 | server side for Samba 4. |
75 | ||
deb0420c | 76 | t) In support for OS/2 (LANMAN 1.2 and LANMAN2.1 based SMB servers) |
35c11fdd | 77 | need to add ability to set time to server (utimes command) |
9a899e76 | 78 | |
deb0420c SF |
79 | u) DOS attrs - returned as pseudo-xattr in Samba format (check VFAT and NTFS for this too) |
80 | ||
4523cc30 | 81 | v) mount check for unmatched uids |
deb0420c | 82 | |
a403a0a3 | 83 | w) Add support for new vfs entry points for setlease and fallocate |
9a899e76 | 84 | |
deb0420c SF |
85 | x) Fix Samba 3 server to handle Linux kernel aio so dbench with lots of |
86 | processes can proceed better in parallel (on the server) | |
87 | ||
88 | y) Fix Samba 3 to handle reads/writes over 127K (and remove the cifs mount | |
89 | restriction of wsize max being 127K) | |
90 | ||
91 | KNOWN BUGS (updated April 24, 2007) | |
1da177e4 | 92 | ==================================== |
6a0b4824 SF |
93 | See http://bugzilla.samba.org - search on product "CifsVFS" for |
94 | current bug list. | |
95 | ||
1da177e4 LT |
96 | 1) existing symbolic links (Windows reparse points) are recognized but |
97 | can not be created remotely. They are implemented for Samba and those that | |
6a0b4824 SF |
98 | support the CIFS Unix extensions, although earlier versions of Samba |
99 | overly restrict the pathnames. | |
1da177e4 LT |
100 | 2) follow_link and readdir code does not follow dfs junctions |
101 | but recognizes them | |
102 | 3) create of new files to FAT partitions on Windows servers can | |
103 | succeed but still return access denied (appears to be Windows | |
104 | server not cifs client problem) and has not been reproduced recently. | |
105 | NTFS partitions do not have this problem. | |
75865f8c SF |
106 | 4) Unix/POSIX capabilities are reset after reconnection, and affect |
107 | a few fields in the tree connection but we do do not know which | |
108 | superblocks to apply these changes to. We should probably walk | |
109 | the list of superblocks to set these. Also need to check the | |
110 | flags on the second mount to the same share, and see if we | |
111 | can do the same trick that NFS does to remount duplicate shares. | |
1da177e4 LT |
112 | |
113 | Misc testing to do | |
114 | ================== | |
115 | 1) check out max path names and max path name components against various server | |
116 | types. Try nested symlinks (8 deep). Return max path name in stat -f information | |
117 | ||
118 | 2) Modify file portion of ltp so it can run against a mounted network | |
35c11fdd | 119 | share and run it against cifs vfs in automated fashion. |
1da177e4 LT |
120 | |
121 | 3) Additional performance testing and optimization using iozone and similar - | |
122 | there are some easy changes that can be done to parallelize sequential writes, | |
123 | and when signing is disabled to request larger read sizes (larger than | |
124 | negotiated size) and send larger write sizes to modern servers. | |
125 | ||
6a0b4824 SF |
126 | 4) More exhaustively test against less common servers. More testing |
127 | against Windows 9x, Windows ME servers. | |
8af18971 | 128 |