linux.git/fs/nfs, branch v3.16

NFS: Don't reset pg_moreio in __nfs_pageio_add_request

2014-07-13T19:18:44+00:00

Once we've started sending unstable NFS writes, we do not want to
clear pg_moreio, or we may end up sending the very last request as
a stable write if the commit lists are still empty.

Do, however, reset pg_moreio in the case where we end up having to
recoalesce the write if an attempt to use pNFS failed.

Signed-off-by: Trond Myklebust

NFS: Remove 2 unused variables

2014-07-12T21:35:57+00:00

Cc: Weston Andros Adamson 
Signed-off-by: Trond Myklebust

nfs: handle multiple reqs in nfs_wb_page_cancel

2014-07-12T21:35:47+00:00

Use nfs_lock_and_join_requests to merge all subrequests into the head request -
this cancels and dereferences all subrequests.

Signed-off-by: Weston Andros Adamson 
Signed-off-by: Trond Myklebust

nfs: handle multiple reqs in nfs_page_async_flush

2014-07-12T21:35:46+00:00

Change nfs_find_and_lock_request so nfs_page_async_flush can handle multiple
requests in a page. There is only one request for a page the first time
nfs_page_async_flush is called, but if a write or commit fails, async_flush
is called again and there may be multiple requests associated with the page.
The solution is to merge all the requests in a page group into a single
request before calling nfs_pageio_add_request.

Rename nfs_find_and_lock_request to nfs_lock_and_join_requests and
change it to first lock all requests for the page, then cancel and merge
all subrequests into the head request.

Signed-off-by: Weston Andros Adamson 
Signed-off-by: Trond Myklebust

nfs: change find_request to find_head_request

2014-07-12T20:51:41+00:00

nfs_page_find_request_locked* should find the head request for that page.
Rename the functions and add comments to make this clear, and fix a bug
that could return a subrequest when page_private isn't set on the page.

Signed-off-by: Weston Andros Adamson 
Signed-off-by: Trond Myklebust

nfs: nfs_page should take a ref on the head req

2014-07-12T20:51:41+00:00

nfs_pages that aren't the the head of a group must take a reference on the
head as long as ->wb_head is set to it. This stops the head from hitting
a refcount of 0 while there is still an active nfs_page for the page group.

This avoids kref warnings in the writeback code when the page group head
is found and referenced.

Signed-off-by: Weston Andros Adamson 
Signed-off-by: Trond Myklebust

nfs: mark nfs_page reqs with flag for extra ref

2014-07-12T20:51:41+00:00

Change the use of PG_INODE_REF - set it when taking extra reference on
subrequests and take care to only release once for each request.

Signed-off-by: Weston Andros Adamson 
Signed-off-by: Trond Myklebust

nfs: only show Posix ACLs in listxattr if actually present

2014-07-08T18:36:08+00:00

The big ACL switched nfs to use generic_listxattr, which calls all existing
->list handlers.  Add a custom .listxattr implementation that only lists
the ACLs if they actually are present on the given inode.

Signed-off-by: Christoph Hellwig 
Reported-by: Philippe Troin 
Tested-by: Philippe Troin 
Fixes: 013cdf1088d7 (nfs: use generic posix ACL infrastructure ...)
Cc: stable@vger.kernel.org # 3.14+
Signed-off-by: Trond Myklebust

NFSv4: test SECINFO RPC_AUTH_GSS pseudoflavors for support

2014-06-24T22:46:58+00:00

Fix nfs4_negotiate_security to create an rpc_clnt used to test each SECINFO
returned pseudoflavor. Check credential creation  (and gss_context creation)
which is important for RPC_AUTH_GSS pseudoflavors which can fail for multiple
reasons including mis-configuration.

Don't call nfs4_negotiate in nfs4_submount as it was just called by
nfs4_proc_lookup_mountpoint (nfs4_proc_lookup_common)

Signed-off-by: Andy Adamson 
[Trond: fix corrupt return value from nfs_find_best_sec()]
Signed-off-by: Trond Myklebust

NFS Return -EPERM if no supported or matching SECINFO flavor

2014-06-24T22:46:58+00:00

Do not return RPC_AUTH_UNIX if SEINFO reply tests fail. This
prevents an infinite loop of NFS4ERR_WRONGSEC for non RPC_AUTH_UNIX mounts.

Without this patch, a mount with no sec= option to a server
that does not include RPC_AUTH_UNIX in the
SECINFO return can be presented with an attemtp to use RPC_AUTH_UNIX
which will result in an NFS4ERR_WRONG_SEC which will prompt the SECINFO
call which will again try RPC_AUTH_UNIX....

Signed-off-by: Andy Adamson 
Tested-By: Steve Dickson 
Signed-off-by: Trond Myklebust