linux-toradex.git/fs/nfs/internal.h, branch v3.4.89

nfs: Show original device name verbatim in /proc/*/mount{s,info}

2012-11-17T21:16:11+00:00

commit 97a54868262da1629a3e65121e65b8e8c4419d9f upstream.

Since commit c7f404b ('vfs: new superblock methods to override
/proc/*/mount{s,info}'), nfs_path() is used to generate the mounted
device name reported back to userland.

nfs_path() always generates a trailing slash when the given dentry is
the root of an NFS mount, but userland may expect the original device
name to be returned verbatim (as it used to be).  Make this
canonicalisation optional and change the callers accordingly.

[jrnieder@gmail.com: use flag instead of bool argument]
Reported-and-tested-by: Chris Hiestand 
Reference: http://bugs.debian.org/669314
Signed-off-by: Ben Hutchings 
Signed-off-by: Jonathan Nieder 
Signed-off-by: Trond Myklebust 
Signed-off-by: Greg Kroah-Hartman

NFS: Honor the authflavor set in the clone mount data

2012-04-27T18:10:03+00:00

The authflavor is set in an nfs_clone_mount structure and passed to the
xdev_mount() functions where it was promptly ignored.  Instead, use it
to initialize an rpc_clnt for the cloned server.

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

NFS: Fix following referral mount points with different security

2012-04-27T18:10:02+00:00

I create a new proc_lookup_mountpoint() to use when submounting an NFS
v4 share.  This function returns an rpc_clnt to use for performing an
fs_locations() call on a referral's mountpoint.

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

NFS: Do secinfo as part of lookup

2012-04-27T18:10:02+00:00

Whenever lookup sees wrongsec do a secinfo and retry the lookup to find
attributes of the file or directory, such as "is this a referral
mountpoint?".  This also allows me to remove handling -NFS4ERR_WRONSEC
as part of getattr xdr decoding.

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

NFSv4.1: Clean ups and bugfixes for the pNFS read/writeback/commit code

2012-03-17T15:09:33+00:00

Move more pnfs-isms out of the generic commit code.

Bugfixes:

- filelayout_scan_commit_lists doesn't need to get/put the lseg.
  In fact since it is run under the inode->i_lock, the lseg_put()
  can deadlock.

- Ensure that we distinguish between what needs to be done for
  commit-to-data server and what needs to be done for commit-to-MDS
  using the new flag PG_COMMIT_TO_DS. Otherwise we may end up calling
  put_lseg() on a bucket for a struct nfs_page that got written
  through the MDS.

- Fix a case where we were using list_del() on an nfs_page->wb_list
  instead of list_del_init().

- filelayout_initiate_commit needs to call filelayout_commit_release
  on error instead of the mds_ops->rpc_release(). Otherwise it won't
  clear the commit lock.

Cleanups:

- Let the files layout manage the commit lists for the pNFS case.
  Don't expose stuff like pnfs_choose_commit_list, and the fact
  that the commit buckets hold references to the layout segment
  in common code.

- Cast out the put_lseg() calls for the struct nfs_read/write_data->lseg
  into the pNFS layer from whence they came.

- Let the pNFS layer manage the NFS_INO_PNFS_COMMIT bit.

Signed-off-by: Trond Myklebust 
Cc: Fred Isaman

NFS: remove nfs_inode radix tree

2012-03-10T22:14:10+00:00

The radix tree is only being used to compile lists of reqs needing commit.
It is simpler to just put the reqs directly into a list.

Signed-off-by: Fred Isaman 
Signed-off-by: Trond Myklebust

NFS: search for client session id in proper network namespace

2012-02-06T23:48:04+00:00

Network namespace is taken from request transport and passed as a part of
cb_process_state structure.

Signed-off-by: Stanislav Kinsbursky 
Signed-off-by: Trond Myklebust

NFS: make nfs_client_lock per net ns

2012-02-06T23:48:03+00:00

This patch makes nfs_clients_lock allocated per network namespace. All items it
protects are already network namespace aware.

Signed-off-by: Stanislav Kinsbursky 
Signed-off-by: Trond Myklebust

NFS: make cb_ident_idr per net ns

2012-02-06T23:48:03+00:00

This patch makes ID's infrastructure network namespace aware. This was done
mainly because of nfs_client_lock, which is desired to be per network
namespace, but protects NFS clients ID's.

NOTE: NFS client's net pointer have to be set prior to ID initialization,
proper assignment was moved.

Signed-off-by: Stanislav Kinsbursky 
Signed-off-by: Trond Myklebust

NFS: make nfs_client_list per net ns

2012-02-06T23:48:02+00:00

This patch splits global list of NFS clients into per-net-ns array of lists.
This looks more strict and clearer.
BTW, this patch also makes "/proc/fs/nfsfs/servers" entry content depends on
/proc mount owner pid namespace. See below for details.

NOTE: few words about how was /proc/fs/nfsfs/ entries content show per network
namespace done. This is a little bit tricky and not the best is could be. But
it's cheap (proper fix for /proc conteinerization is a hard nut to crack).
The idea is simple: take proper network namespace from pid namespace
child reaper nsproxy of /proc/ mount creator.
This actually means, that if there are 2 containers with different net
namespace sharing pid namespace, then read of /proc/fs/nfsfs/ entries will
always return content, taken from net namespace of pid namespace creator task
(and thus second namespace set wil be unvisible).

Signed-off-by: Stanislav Kinsbursky 
Signed-off-by: Trond Myklebust