forked from luck/tmp_suning_uos_patched
update CIFS TODO list
Signed-off-by: Steve French <smfrench@gmail.com>
This commit is contained in:
Steve French
parent
480e83275a
commit
2075cf0b71
@ -1,4 +1,4 @@
|
||||
Version 1.53 May 20, 2008
|
||||
Version 2.03 August 1, 2014
|
||||
|
||||
A Partial List of Missing Features
|
||||
==================================
|
||||
@ -7,63 +7,49 @@ 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
|
||||
a) SMB3 (and SMB3.02) missing optional features:
|
||||
- RDMA
|
||||
- multichannel (started)
|
||||
- directory leases (improved metadata caching)
|
||||
- T10 copy offload (copy chunk is only mechanism supported)
|
||||
- encrypted shares
|
||||
|
||||
b) Mapping POSIX ACLs (and eventually NFSv4 ACLs) to CIFS
|
||||
SecurityDescriptors
|
||||
b) improved sparse file support
|
||||
|
||||
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
|
||||
c) 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
|
||||
d) 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)
|
||||
e) 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
|
||||
f) 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
|
||||
g) 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
|
||||
h) 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
|
||||
i) Finish inotify 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
|
||||
j) 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
|
||||
k) 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)
|
||||
l) Implement O_DIRECT flag on open (already supported on mount)
|
||||
|
||||
r) Create UID mapping facility so server UIDs can be mapped on a per
|
||||
m) 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
|
||||
@ -71,28 +57,29 @@ 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.
|
||||
n) DOS attrs - returned as pseudo-xattr in Samba format (check VFAT and NTFS for this too)
|
||||
|
||||
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)
|
||||
o) mount check for unmatched uids
|
||||
|
||||
u) DOS attrs - returned as pseudo-xattr in Samba format (check VFAT and NTFS for this too)
|
||||
p) Add support for new vfs entry point for fallocate
|
||||
|
||||
v) mount check for unmatched uids
|
||||
q) Add tools to take advantage of cifs/smb3 specific ioctls and features
|
||||
such as "CopyChunk" (fast server side file copy)
|
||||
|
||||
w) Add support for new vfs entry point for fallocate
|
||||
r) encrypted file support
|
||||
|
||||
x) Fix Samba 3 server to handle Linux kernel aio so dbench with lots of
|
||||
processes can proceed better in parallel (on the server)
|
||||
s) improved stats gathering, tools (perhaps integration with nfsometer?)
|
||||
|
||||
y) Fix Samba 3 to handle reads/writes over 127K (and remove the cifs mount
|
||||
restriction of wsize max being 127K)
|
||||
t) allow setting more NTFS/SMB3 file attributes remotely (currently limited to compressed
|
||||
file attribute via chflags)
|
||||
|
||||
KNOWN BUGS (updated April 24, 2007)
|
||||
u) mount helper GUI (to simplify the various configuration options on mount)
|
||||
|
||||
|
||||
KNOWN BUGS
|
||||
====================================
|
||||
See http://bugzilla.samba.org - search on product "CifsVFS" for
|
||||
current bug list.
|
||||
current bug list. Also check http://bugzilla.kernel.org (Product = File System, Component = CIFS)
|
||||
|
||||
1) existing symbolic links (Windows reparse points) are recognized but
|
||||
can not be created remotely. They are implemented for Samba and those that
|
||||
@ -100,30 +87,18 @@ 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.
|
||||
2) Improve xfstest's cifs enablement and adapt xfstests where needed to test
|
||||
cifs better
|
||||
|
||||
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.
|
||||
|
||||
4) More exhaustively test against less common servers
|
||||
|
||||
Loading…
Reference in New Issue
Block a user