linux-toradex.git/fs/nfs/callback_xdr.c, branch v4.2.1

NFS: Convert use of __constant_htonl to htonl

2015-06-10T22:57:59+00:00

In little endian cases, the macro htonl unfolds to __swab32 which
provides special case for constants. In big endian cases,
__constant_htonl and htonl expand directly to the same expression.
So, replace __constant_htonl with htonl with the goal of getting
rid of the definition of __constant_htonl completely.

The semantic patch that performs this transformation is as follows:

@@expression x;@@

- __constant_htonl(x)
+ htonl(x)

Signed-off-by: Vaishali Thakkar 
Signed-off-by: Trond Myklebust

NFSv4.1: Convert open-coded array allocation calls to kmalloc_array()

2015-02-12T00:02:52+00:00

For added overflow protection...

Signed-off-by: Trond Myklebust

NFSv4.1: Fix a kfree() of uninitialised pointers in decode_cb_sequence_args

2015-02-12T00:02:51+00:00

If the call to decode_rc_list() fails due to a memory allocation error,
then we need to truncate the array size to ensure that we only call
kfree() on those pointer that were allocated.

Reported-by: David Ramos 
Fixes: 4aece6a19cf7f ("nfs41: cb_sequence xdr implementation")
Cc: stable@vger.kernel.org
Signed-off-by: Trond Myklebust

Merge branch 'labeled-nfs' into linux-next

2013-06-28T20:29:51+00:00

* labeled-nfs:
  NFS: Apply v4.1 capabilities to v4.2
  NFS: Add in v4.2 callback operation
  NFS: Make callbacks minor version generic
  Kconfig: Add Kconfig entry for Labeled NFS V4 client
  NFS: Extend NFS xattr handlers to accept the security namespace
  NFS: Client implementation of Labeled-NFS
  NFS: Add label lifecycle management
  NFS:Add labels to client function prototypes
  NFSv4: Extend fattr bitmaps to support all 3 words
  NFSv4: Introduce new label structure
  NFSv4: Add label recommended attribute and NFSv4 flags
  NFSv4.2: Added NFS v4.2 support to the NFS client
  SELinux: Add new labeling type native labels
  LSM: Add flags field to security_sb_set_mnt_opts for in kernel mount data.
  Security: Add Hook to test if the particular xattr is part of a MAC model.
  Security: Add hook to calculate context based on a negative dentry.
  NFS: Add NFSv4.2 protocol constants

Conflicts:
	fs/nfs/nfs4proc.c

NFS: Add in v4.2 callback operation

2013-06-08T20:20:18+00:00

NFS v4.2 adds a CB_OFFLOAD operation used by COPY and WRITE_PLUS.  Since
neither of these operations have been implemented yet, simply return
NFS4ERR_NOTSUPP.

Signed-off-by: Bryan Schumaker 
Signed-off-by: Trond Myklebust

NFS: Make callbacks minor version generic

2013-06-08T20:20:18+00:00

I found a few places that hardcode the minor version number rather than
making it dependent on the protocol the callback came in over.  This
patch makes it easier to add new minor versions in the future.

Signed-off-by: Bryan Schumaker 
Signed-off-by: Trond Myklebust

NFSv4.2: Added NFS v4.2 support to the NFS client

2013-06-08T20:20:13+00:00

This enable NFSv4.2 support. To enable this code the
CONFIG_NFS_V4_2 Kconfig define needs to be set and
the -o v4.2 mount option need to be used.

Signed-off-by: Steve Dickson 
Signed-off-by: Trond Myklebust

NFSv4.1 Fix a pNFS session draining deadlock

2013-05-20T18:20:14+00:00

On a CB_RECALL the callback service thread flushes the inode using
filemap_flush prior to scheduling the state manager thread to return the
delegation. When pNFS is used and I/O has not yet gone to the data server
servicing the inode, a LAYOUTGET can preceed the I/O. Unlike the async
filemap_flush call, the LAYOUTGET must proceed to completion.

If the state manager starts to recover data while the inode flush is sending
the LAYOUTGET, a deadlock occurs as the callback service thread holds the
single callback session slot until the flushing is done which blocks the state
manager thread, and the state manager thread has set the session draining bit
which puts the inode flush LAYOUTGET RPC to sleep on the forechannel slot
table waitq.

Separate the draining of the back channel from the draining of the fore channel
by moving the NFS4_SESSION_DRAINING bit from session scope into the fore
and back slot tables.  Drain the back channel first allowing the LAYOUTGET
call to proceed (and fail) so the callback service thread frees the callback
slot. Then proceed with draining the forechannel.

Signed-off-by: Andy Adamson 
Signed-off-by: Trond Myklebust

NFSv4.1: Move slot table and session struct definitions to nfs4session.h

2012-12-05T23:30:46+00:00

Clean up. Gather NFSv4.1 slot definitions in fs/nfs/nfs4session.h.

Signed-off-by: Trond Myklebust

NFSv4.1: Clean up session draining

2012-12-05T23:30:44+00:00

Coalesce nfs4_check_drain_bc_complete and nfs4_check_drain_fc_complete
into a single function that can be called when the slot table is known
to be empty, then change nfs4_callback_free_slot() and nfs4_free_slot()
to use it.

Signed-off-by: Trond Myklebust