linux-toradex.git/fs/cifs/misc.c, branch v3.4.16

cifs: add new cifsiod_wq workqueue

2012-03-23T18:40:53+00:00

...and convert existing cifs users of system_nrt_wq to use that instead.

Also, make it freezable, and set WQ_MEM_RECLAIM since we use it to
deal with write reply handling.

Signed-off-by: Jeff Layton 
Acked-by: Shirish Pargaonkar

CIFS: Change mid_q_entry structure fields

2012-03-23T18:28:03+00:00

to be protocol-unspecific and big enough to keep both CIFS
and SMB2 values.

Signed-off-by: Pavel Shilovsky

CIFS: Expand CurrentMid field

2012-03-23T18:28:03+00:00

While in CIFS/SMB we have 16 bit mid, in SMB2 it is 64 bit.
Convert the existing field to 64 bit and mask off higher bits
for CIFS/SMB.

Signed-off-by: Pavel Shilovsky

CIFS: Separate protocol-specific code from demultiplex code

2012-03-23T18:28:02+00:00

Signed-off-by: Pavel Shilovsky

CIFS: Separate protocol-specific code from transport routines

2012-03-23T18:28:02+00:00

that lets us use this functions for SMB2.

Signed-off-by: Pavel Shilovsky

CIFS: Introduce credit-based flow control

2012-03-21T16:35:03+00:00

and send no more than credits value requests at once. For SMB/CIFS
it's trivial: increment this value by receiving any message and
decrement by sending one.

Reviewed-by: Jeff Layton 
Signed-off-by: Pavel Shilovsky 
Signed-off-by: Steve French

cifs: Add mount options for backup intent (try #6)

2011-10-13T04:42:17+00:00

Add mount options backupuid and backugid.

It allows an authenticated user to access files with the intent to back them
up including their ACLs, who may not have access permission but has
"Backup files and directories user right" on them (by virtue of being part
of the built-in group Backup Operators.

When mount options backupuid is specified, cifs client restricts the
use of backup intents to the user whose effective user id is specified
along with the mount option.

When mount options backupgid is specified, cifs client restricts the
use of backup intents to the users whose effective user id belongs to the
group id specified along with the mount option.

If an authenticated user is not part of the built-in group Backup Operators
at the server, access to such files is denied, even if allowed by the client.

Signed-off-by: Shirish Pargaonkar 
Reviewed-by: Jeff Layton 
Signed-off-by: Steve French

cifs: clean up checkSMB

2011-10-13T04:41:36+00:00

The variable names in this function are so ambiguous that it's very
difficult to know what it's doing. Rename them to make it a bit more
clear.

Also, remove a redundant length check. cifsd checks to make sure that
the rfclen isn't larger than the maximum frame size when it does the
receive.

Finally, change checkSMB to return a real error code (-EIO) when
it finds an error. That will help simplify some coming changes in the
callers.

Signed-off-by: Jeff Layton 
Signed-off-by: Steve French

cifs: simplify refcounting for oplock breaks

2011-07-31T21:21:20+00:00

Currently, we take a sb->s_active reference and a cifsFileInfo reference
when an oplock break workqueue job is queued. This is unnecessary and
more complicated than it needs to be. Also as Al points out,
deactivate_super has non-trivial locking implications so it's best to
avoid that if we can.

Instead, just cancel any pending oplock breaks for this filehandle
synchronously in cifsFileInfo_put after taking it off the lists.
That should ensure that this job doesn't outlive the structures it
depends on.

Reported-by: Al Viro 
Signed-off-by: Jeff Layton 
Signed-off-by: Steve French

[CIFS] Rename three structures to avoid camel case

2011-05-27T04:34:02+00:00

secMode to sec_mode
and
cifsTconInfo to cifs_tcon
and
cifsSesInfo to cifs_ses

Signed-off-by: Steve French