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Revert "NFS: Make close(2) asynchronous when closing NFS O_DIRECT files"

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This reverts commit f895c53f8a.

This commit causes a NFSv4 regression in that close()+unlink() can end
up failing. The reason is that we no longer have a guarantee that the
CLOSE has completed on the server, meaning that the subsequent call to
REMOVE may fail with NFS4ERR_FILE_OPEN if the server implements Windows
unlink() semantics.

Reported-by: <Olga Kornievskaia <aglo@umich.edu>
Cc: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Trond Myklebust 2015-09-04 15:17:53 -04:00
parent 5cf9d70659
commit 4eae50143b
1 changed files with 6 additions and 1 deletions
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7
fs/nfs/inode.c
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@ -853,6 +853,11 @@ void put_nfs_open_context(struct nfs_open_context *ctx)
} }
EXPORT_SYMBOL_GPL(put_nfs_open_context); EXPORT_SYMBOL_GPL(put_nfs_open_context);
static void put_nfs_open_context_sync(struct nfs_open_context *ctx)
{
__put_nfs_open_context(ctx, 1);
}
/* /*
* Ensure that mmap has a recent RPC credential for use when writing out * Ensure that mmap has a recent RPC credential for use when writing out
* shared pages * shared pages
@ -908,7 +913,7 @@ void nfs_file_clear_open_context(struct file *filp)
spin_lock(&inode->i_lock); spin_lock(&inode->i_lock);
list_move_tail(&ctx->list, &NFS_I(inode)->open_files); list_move_tail(&ctx->list, &NFS_I(inode)->open_files);
spin_unlock(&inode->i_lock); spin_unlock(&inode->i_lock);
__put_nfs_open_context(ctx, filp->f_flags & O_DIRECT ? 0 : 1); put_nfs_open_context_sync(ctx);
} }
} }