linux.git/fs/nfs/callback_proc.c, branch v3.13

NFS: When displaying session slot numbers, use "%u" consistently

2013-09-03T19:26:30+00:00

Clean up, since slot and sequence numbers are all unsigned anyway.

Among other things, squelch compiler warnings:

linux/fs/nfs/nfs4proc.c: In function ‘nfs4_setup_sequence’:
linux/fs/nfs/nfs4proc.c:703:2: warning: signed and unsigned type in
	conditional expression [-Wsign-compare]

and

linux/fs/nfs/nfs4session.c: In function ‘nfs4_alloc_slot’:
linux/fs/nfs/nfs4session.c:151:31: warning: signed and unsigned type in
	conditional expression [-Wsign-compare]

Signed-off-by: Chuck Lever 
Signed-off-by: Trond Myklebust

NFSv4.1: Add tracepoints for debugging slot table operations

2013-08-22T12:58:27+00:00

Add tracepoints to nfs41_setup_sequence and nfs41_sequence_done
to track session and slot table state changes.

Signed-off-by: Trond Myklebust

NFSv4: Add tracepoints for debugging delegations

2013-08-22T12:58:24+00:00

Set up tracepoints to track when delegations are set, reclaimed,
returned by the client, or recalled by the server.

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: 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

NFSv4.1 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: Fix CB_RECALL_ANY to only return delegations that are not in use

2013-04-05T21:03:57+00:00

Signed-off-by: Trond Myklebust

NFSv4.1: Fix bulk recall and destroy of layouts

2013-02-14T18:22:50+00:00

The current code in pnfs_destroy_all_layouts() assumes that removing
the layout from the server->layouts list is sufficient to make it
invisible to other processes. This ignores the fact that most
users access the layout through the nfs_inode->layout...
There is further breakage due to lack of reference counting of the
layouts, meaning that the whole thing Oopses at the drop of a hat.

The code in initiate_bulk_draining() is almost correct, and can be
used as a model for pnfs_destroy_all_layouts(), so move that
code to pnfs.c, and refactor the code to allow us to choose between
a single filesystem bulk recall, and a recall of all layouts.
Also note that initiate_bulk_draining() currently calls iput() while
holding locks. Fix that too.

Signed-off-by: Trond Myklebust 
Cc: stable@vger.kernel.org

nfs: avoid dereferencing null pointer in initiate_bulk_draining

2013-01-05T19:26:51+00:00

Fix an inverted null pointer check in initiate_bulk_draining().

Signed-off-by: Nickolai Zeldovich 
Signed-off-by: Trond Myklebust 
Cc: stable@vger.kernel.org [>= 3.7]

NFSv4.1: Cleanup move session slot management to fs/nfs/nfs4session.c

2012-12-05T23:30:45+00:00

NFSv4.1 session management is getting complex enough to deserve
a separate file.

Signed-off-by: Trond Myklebust