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Diffstat (limited to 'fs/cifs/TODO')
| -rw-r--r-- | fs/cifs/TODO | 129 |
1 files changed, 0 insertions, 129 deletions
diff --git a/fs/cifs/TODO b/fs/cifs/TODO deleted file mode 100644 index 355abcdcda9..00000000000 --- a/fs/cifs/TODO +++ /dev/null @@ -1,129 +0,0 @@ -Version 1.53 May 20, 2008 - -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(Windows/CIFS ACLs) for chmod/chgrp/chown -so that these operations can be supported to Windows servers - -b) Mapping POSIX ACLs (and eventually NFSv4 ACLs) to CIFS -SecurityDescriptors - -c) Better pam/winbind integration (e.g. to handle uid mapping -better) - -d) Cleanup now unneeded SessSetup code in -fs/cifs/connect.c and add back in NTLMSSP code if any servers -need it - -e) fix NTLMv2 signing when two mounts with different users to same -server. - -f) Directory entry caching relies on a 1 second timer, rather than -using FindNotify or equivalent. - (started) - -g) quota support (needs minor kernel change since quota calls -to make it to network filesystems or deviceless filesystems) - -h) investigate sync behavior (including syncpage) and check -for proper behavior of intr/nointr - -i) improve support for very old servers (OS/2 and Win9x for example) -Including support for changing the time remotely (utimes command). - -j) hook lower into the sockets api (as NFS/SunRPC does) to avoid the -extra copy in/out of the socket buffers in some cases. - -k) 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). - -l) 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. - -m) Add support for storing symlink info to Windows servers -in the Extended Attribute format their SFU clients would recognize. - -n) Finish fcntl D_NOTIFY support so kde and gnome file list windows -will autorefresh (partially complete by Asser). Needs minor kernel -vfs change to support removing D_NOTIFY on a file. - -o) Add GUI tool to configure /proc/fs/cifs settings and for display of -the CIFS statistics (started) - -p) implement support for security and trusted categories of xattrs -(requires minor protocol extension) to enable better support for SELINUX - -q) Implement O_DIRECT flag on open (already supported on mount) - -r) Create UID mapping facility so server UIDs can be mapped on a per -mount or a per server basis to client UIDs or nobody if no mapping -exists. This is helpful when Unix extensions are negotiated to -allow better permission checking when UIDs differ on the server -and client. Add new protocol request to the CIFS protocol -standard for asking the server for the corresponding name of a -particular uid. - -s) Add support for CIFS Unix and also the newer POSIX extensions to the -server side for Samba 4. - -t) In support for OS/2 (LANMAN 1.2 and LANMAN2.1 based SMB servers) -need to add ability to set time to server (utimes command) - -u) DOS attrs - returned as pseudo-xattr in Samba format (check VFAT and NTFS for this too) - -v) mount check for unmatched uids - -w) Add support for new vfs entry point for fallocate - -x) Fix Samba 3 server to handle Linux kernel aio so dbench with lots of -processes can proceed better in parallel (on the server) - -y) Fix Samba 3 to handle reads/writes over 127K (and remove the cifs mount -restriction of wsize max being 127K) - -KNOWN BUGS (updated April 24, 2007) -==================================== -See http://bugzilla.samba.org - search on product "CifsVFS" for -current bug list. - -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, although earlier versions of Samba -overly restrict the pathnames. -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) Unix/POSIX capabilities are reset after reconnection, and affect -a few fields in the tree connection but we do do not know which -superblocks to apply these changes to. We should probably walk -the list of superblocks to set these. Also need to check the -flags on the second mount to the same share, and see if we -can do the same trick that NFS does to remount duplicate shares. - -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 in automated fashion. - -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 against less common servers. More testing -against Windows 9x, Windows ME servers. - |