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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /fs/cifs/TODO | |
download | lwn-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz lwn-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'fs/cifs/TODO')
-rw-r--r-- | fs/cifs/TODO | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/fs/cifs/TODO b/fs/cifs/TODO new file mode 100644 index 000000000000..f4e3e1f67ee4 --- /dev/null +++ b/fs/cifs/TODO @@ -0,0 +1,104 @@ +version 1.22 July 30, 2004 + +A Partial List of Missing Features +================================== + +Contributions are welcome. There are plenty of opportunities +for visible, important contributions to this module. Here +is a partial list of the known problems and missing features: + +a) Support for SecurityDescriptors for chmod/chgrp/chown so +these can be supported for Windows servers + +b) Better pam/winbind integration (e.g. to handle uid mapping +better) + +c) multi-user mounts - multiplexed sessionsetups over single vc +(ie tcp session) - prettying up needed, and more testing needed + +d) Kerberos/SPNEGO session setup support - (started) + +e) NTLMv2 authentication (mostly implemented) + +f) MD5-HMAC signing SMB PDUs when SPNEGO style SessionSetup +used (Kerberos or NTLMSSP). Signing alreadyimplemented for NTLM +and raw NTLMSSP already. This is important when enabling +extended security and mounting to Windows 2003 Servers + +f) Directory entry caching relies on a 1 second timer, rather than +using FindNotify or equivalent. - (started) + +g) A few byte range testcases fail due to POSIX vs. Windows/CIFS +style byte range lock differences + +h) quota support + +j) finish writepages support (multi-page write behind for improved +performance) and syncpage + +k) hook lower into the sockets api (as NFS/SunRPC does) to avoid the +extra copy in/out of the socket buffers in some cases. + +l) finish support for IPv6. This is mostly complete but +needs a simple conversion of ipv6 to sin6_addr from the +address in string representation. + +m) Better optimize open (and pathbased setfilesize) to reduce the +oplock breaks coming from windows srv. Piggyback identical file +opens on top of each other by incrementing reference count rather +than resending (helps reduce server resource utilization and avoid +spurious oplock breaks). + +o) Improve performance of readpages by sending more than one read +at a time when 8 pages or more are requested. In conjuntion +add support for async_cifs_readpages. + +p) Add support for storing symlink and fifo info to Windows servers +in the Extended Attribute format their SFU clients would recognize. + +q) Finish fcntl D_NOTIFY support so kde and gnome file list windows +will autorefresh (started) + +r) Add GUI tool to configure /proc/fs/cifs settings and for display of +the CIFS statistics (started) + +q) implement support for security and trusted categories of xattrs +(requires minor protocol extension) to enable better support for SELINUX + +r) Implement O_DIRECT flag on open (already supported on mount) + +KNOWN BUGS (updated December 10, 2004) +==================================== +1) existing symbolic links (Windows reparse points) are recognized but +can not be created remotely. They are implemented for Samba and those that +support the CIFS Unix extensions but Samba has a bug currently handling +symlink text beginning with slash +2) follow_link and readdir code does not follow dfs junctions +but recognizes them +3) create of new files to FAT partitions on Windows servers can +succeed but still return access denied (appears to be Windows +server not cifs client problem) and has not been reproduced recently. +NTFS partitions do not have this problem. +4) debug connectathon lock test case 10 which fails against +Samba (may be unmappable due to POSIX to Windows lock model +differences but worth investigating). Also debug Samba to +see why lock test case 7 takes longer to complete to Samba +than to Windows. + +Misc testing to do +================== +1) check out max path names and max path name components against various server +types. Try nested symlinks (8 deep). Return max path name in stat -f information + +2) Modify file portion of ltp so it can run against a mounted network +share and run it against cifs vfs. + +3) Additional performance testing and optimization using iozone and similar - +there are some easy changes that can be done to parallelize sequential writes, +and when signing is disabled to request larger read sizes (larger than +negotiated size) and send larger write sizes to modern servers. + +4) More exhaustively test the recently added NT4 support against various +NT4 service pack levels, and fix cifs_setattr for setting file times and +size to fall back to level 1 when error invalid level returned. + |