linux-toradex.git/include/linux/nfs_fs.h, branch v2.6.34

NFS: Fix an unstable write data integrity race

2010-04-22T19:35:57+00:00

Commit 2c61be0a9478258f77b66208a0c4b1f5f8161c3c (NFS: Ensure that the WRITE
and COMMIT RPC calls are always uninterruptible) exposed a race on file
close. In order to ensure correct close-to-open behaviour, we want to wait
for all outstanding background commit operations to complete.

This patch adds an inode flag that indicates if a commit operation is under
way, and provides a mechanism to allow ->write_inode() to wait for its
completion if this is a data integrity flush.

Signed-off-by: Trond Myklebust

NFS: Remove requirement for inode->i_mutex from nfs_invalidate_mapping

2010-03-05T20:44:56+00:00

Signed-off-by: Trond Myklebust

NFS: Simplify nfs_wb_page()

2010-03-05T20:44:55+00:00

Signed-off-by: Trond Myklebust

NFS: Replace __nfs_write_mapping with sync_inode()

2010-03-05T20:44:55+00:00

Now that we have correct COMMIT semantics in writeback_single_inode, we can
reduce and simplify nfs_wb_all(). Also replace nfs_wb_nocommit() with a
call to filemap_write_and_wait(), which doesn't need to hold the
inode->i_mutex.

With that done, we can eliminate nfs_write_mapping() altogether.

Signed-off-by: Trond Myklebust

NFS: Simplify nfs_wb_page_cancel()

2010-03-05T20:44:55+00:00

In all cases we should be able to just remove the request and call
cancel_dirty_page().

Signed-off-by: Trond Myklebust

NFS: Add a count of the number of unstable writes carried by an inode

2010-03-05T20:44:54+00:00

In order to know when we should do opportunistic commits of the unstable
writes, when the VM is doing a background flush, we add a field to count
the number of unstable writes.

Signed-off-by: Trond Myklebust

NFS: Cleanup - move nfs_write_inode() into fs/nfs/write.c

2010-03-05T20:44:53+00:00

The sole purpose of nfs_write_inode is to commit unstable writes, so
move it into fs/nfs/write.c, and make nfs_commit_inode static.

Signed-off-by: Trond Myklebust

headers: kref.h redux

2009-09-26T17:17:19+00:00

* remove asm/atomic.h inclusion from kref.h -- not needed, linux/types.h
  is enough for atomic_t
* remove linux/kref.h inclusion from files which do not need it.

Signed-off-by: Alexey Dobriyan 
Signed-off-by: Linus Torvalds

NFS: Fix an O_DIRECT Oops...

2009-08-12T15:21:39+00:00

We can't call nfs_readdata_release()/nfs_writedata_release() without
first initialising and referencing args.context. Doing so inside
nfs_direct_read_schedule_segment()/nfs_direct_write_schedule_segment()
causes an Oops.

We should rather be calling nfs_readdata_free()/nfs_writedata_free() in
those cases.

Looking at the O_DIRECT code, the "struct nfs_direct_req" is already
referencing the nfs_open_context for us. Since the readdata and writedata
structures carry a reference to that, we can simplify things by getting rid
of the extra nfs_open_context references, so that we can replace all
instances of nfs_readdata_release()/nfs_writedata_release().

Reported-by: Catalin Marinas 
Signed-off-by: Trond Myklebust 
Tested-by: Catalin Marinas 
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds

NFS: nfs_readpage_async() needs to be accessible as a fallback for local caching

2009-04-03T15:42:44+00:00

nfs_readpage_async() needs to be non-static so that it can be used as a
fallback for the local on-disk caching should an EIO crop up when reading the
cache.

Signed-off-by: David Howells 
Acked-by: Steve Dickson 
Acked-by: Trond Myklebust 
Acked-by: Al Viro 
Tested-by: Daire Byrne