linux-toradex.git/include/linux/nfs_page.h, branch T20_LinuxImageV2.0Beta1_20121218

NFS: Move the pnfs write code into pnfs.c

2011-07-15T13:12:22+00:00

...and ensure that we recoalese to take into account differences in
differences in block sizes when falling back to write through the MDS.

Signed-off-by: Trond Myklebust

NFS: Move the pnfs read code into pnfs.c

2011-07-15T13:12:21+00:00

...and ensure that we recoalese to take into account differences in
block sizes when falling back to read through the MDS.

Signed-off-by: Trond Myklebust

NFS: Allow the nfs_pageio_descriptor to signal that a re-coalesce is needed

2011-07-15T13:12:21+00:00

If an attempt to do pNFS fails, and we have to fall back to writing through
the MDS, then we may want to re-coalesce the requests that we already have
since the block size for the MDS read/writes may be different to that of
the DS read/writes.

Signed-off-by: Trond Myklebust

NFS: Cache rpc_ops in struct nfs_pageio_descriptor

2011-07-15T13:12:20+00:00

Signed-off-by: Trond Myklebust

NFSv4.1: Add an initialisation callback for pNFS

2011-07-12T17:40:28+00:00

Ensure that we always get a layout before setting up the i/o request.

Signed-off-by: Trond Myklebust

NFS: Cleanup of the nfs_pageio code in preparation for a pnfs bugfix

2011-07-12T17:40:28+00:00

We need to ensure that the layouts are set up before we can decide to
coalesce requests. To do so, we want to further split up the struct
nfs_pageio_descriptor operations into an initialisation callback, a
coalescing test callback, and a 'do i/o' callback.

This patch cleans up the existing callback methods before adding the
'initialisation' callback.

Signed-off-by: Trond Myklebust

NFSv4.1: file layout must consider pg_bsize for coalescing

2011-06-20T20:12:26+00:00

Otherwise we end up overflowing the rpc buffer size on the receive end.

Signed-off-by: Benny Halevy 
Signed-off-by: Trond Myklebust

NFSv4.1: change pg_test return type to bool

2011-05-29T17:56:54+00:00

Signed-off-by: Benny Halevy

NFS: Fix a hang in the writeback path

2011-03-27T15:48:07+00:00

Now that the inode scalability patches have been merged, it is no longer
safe to call igrab() under the inode->i_lock.
Now that we no longer call nfs_clear_request() until the nfs_page is
being freed, we know that we are always holding a reference to the
nfs_open_context, which again holds a reference to the path, and so
the inode cannot be freed until the last nfs_page has been removed
from the radix tree and freed.

We can therefore skip the igrab()/iput() altogether.

Signed-off-by: Trond Myklebust

NFSv4.1: add generic layer hooks for pnfs COMMIT

2011-03-23T19:29:03+00:00

We create three major hooks for the pnfs code.

pnfs_mark_request_commit() is called during writeback_done from
nfs_mark_request_commit, which gives the driver an opportunity to
claim it wants control over commiting a particular req.

pnfs_choose_commit_list() is called from nfs_scan_list
to choose which list a given req should be added to, based on
where we intend to send it for COMMIT.  It is up to the driver
to have preallocated list headers for each destination it may need.

pnfs_commit_list() is how the driver actually takes control, it is
used instead of nfs_commit_list().

In order to pass information between the above functions, we create
a union in nfs_page to hold a lseg (which is possible because the req is
not on any list while in transition), and add some flags to indicate
if we need to use the pnfs code.

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