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| author | Trond Myklebust <trond.myklebust@primarydata.com> | 2015-02-26 16:09:04 -0500 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@primarydata.com> | 2015-03-01 23:23:05 -0500 |
| commit | f044636d972246d451e06226cc1675d5da389762 (patch) | |
| tree | 7fbfe0ffc4f5a5b3f9ccf56de8fe887c7394027c /fs/nfs/nfs3proc.c | |
| parent | 140e049c64ce848392adbf4678983ecc76888dde (diff) | |
| download | lwn-f044636d972246d451e06226cc1675d5da389762.tar.gz lwn-f044636d972246d451e06226cc1675d5da389762.zip | |
NFS: Add attribute update barriers to nfs_setattr_update_inode()
Ensure that other operations which raced with our setattr RPC call
cannot revert the file attribute changes that were made on the server.
To do so, we artificially bump the attribute generation counter on
the inode so that all calls to nfs_fattr_init() that precede ours
will be dropped.
The motivation for the patch came from Chuck Lever's reports of readaheads
racing with truncate operations and causing the file size to be reverted.
Reported-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Tested-by: Chuck Lever <chuck.lever@oracle.com>
Diffstat (limited to 'fs/nfs/nfs3proc.c')
| -rw-r--r-- | fs/nfs/nfs3proc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c index 78e557c3ab87..11109a137c0c 100644 --- a/fs/nfs/nfs3proc.c +++ b/fs/nfs/nfs3proc.c @@ -138,7 +138,7 @@ nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, nfs_fattr_init(fattr); status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); if (status == 0) - nfs_setattr_update_inode(inode, sattr); + nfs_setattr_update_inode(inode, sattr, fattr); dprintk("NFS reply setattr: %d\n", status); return status; } |