This is the fourth attempt at a patchset to overhaul the multiuser CIFS
mount capability in the kernel. The main difference from the last is the
addition of a recurring workqueue job to close out idle tcons (Tree
Connects). The patchset has also been rebased on top of a very recent
pull of Steve's tree including the patches from Metze to implement
mfsymlinks.
Many people may be aware that CIFS has a MultiuserMount switch in
/proc/fs/cifs. This code basically works, but it has a number of
shortcomings that make it impractical to deploy. This patchset is
a redesign of that concept from scratch that allows CIFS to use multiple sessions
to the same server, establish them on an as-needed basis and tear them
down when they've been idle for a period of time.
Because we cannot prompt for passwords from the kernel, this code is
currently limited to using krb5 authentication. Igor Druzhinin has done
some work as a Google Summer of Code project to allow the stashing of
username/password in the kernel keyring. Once that code is ready, we'll
be able to extend this to other sec= types as well.
The patchset is large, but I've done my best to split it up into a
logical set of bisectable changes. Some of the patches touch the same
areas of code as earlier ones. This increases the amount of "churn" but
I think it makes a more logical sequence of changes.
At this point, I think this code is ready for merge. I'd like to see it
in 2.6.37. Comments and review are welcome.
Jeff Layton (15):
cifs: add tcon field to cifsFileInfo struct
cifs: make various routines use the cifsFileInfo->tcon pointer
cifs: fix handling of signing with writepages
cifs: add function to get a tcon from cifs_sb
cifs: temporarily rename cifs_sb->tcon to ptcon to catch stragglers
cifs: add cifs_sb_master_tcon and convert some callers to use it
cifs: have cifs_new_fileinfo take a tcon arg
cifs: add refcounted and timestamped container for holding tcons
cifs: have cifsFileInfo hold a reference to a tlink rather than tcon
pointer
cifs: have find_readable/writable_file filter by fsuid
cifs: fix cifs_show_options to show "username=" or "multiuser"
cifs: add routines to build sessions and tcons on the fly
cifs: on multiuser mount, set ownership to
current_fsuid/current_fsgid
cifs: add "multiuser" mount option
cifs: implement recurring workqueue job to prune old tcons
fs/cifs/cifs_dfs_ref.c | 21 ++--
fs/cifs/cifs_fs_sb.h | 11 +-
fs/cifs/cifsacl.c | 46 +++++--
fs/cifs/cifsfs.c | 22 ++--
fs/cifs/cifsglob.h | 40 ++++++
fs/cifs/cifsproto.h | 8 +-
fs/cifs/connect.c | 339 +++++++++++++++++++++++++++++++++++++++++++++++-
fs/cifs/dir.c | 97 ++++++++++-----
fs/cifs/file.c | 161 +++++++++++++-----------
fs/cifs/fscache.c | 13 +-
fs/cifs/inode.c | 213 +++++++++++++++++++++++--------
fs/cifs/ioctl.c | 17 +--
fs/cifs/link.c | 88 ++++++++-----
fs/cifs/misc.c | 2 +-
fs/cifs/readdir.c | 45 ++++---
fs/cifs/xattr.c | 60 ++++++---
16 files changed, 888 insertions(+), 295 deletions(-)
--
1.7.2.3
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