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authorChuck Lever <chuck.lever@oracle.com>2006-09-20 14:33:04 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2006-09-22 23:25:05 -0400
commitf551e44ff11d3e2ec8f37907bb88ec2433cc8b74 (patch)
treef86527c24391f70d72a28111df5c541959e8f293 /fs/nfs/write.c
parenta53a3c58fd83e572a7c768d88b4c4e9840a57e82 (diff)
NFS: add comments clarifying the use of nfs_post_op_update()
Comments-only change to clarify a detail of the NFS protocol and how it is implemented in Linux. Test plan: None. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/write.c')
-rw-r--r--fs/nfs/write.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index 38ba5c09af08..c12effb46fe5 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -1253,7 +1253,13 @@ int nfs_writeback_done(struct rpc_task *task, struct nfs_write_data *data)
1253 dprintk("NFS: %4d nfs_writeback_done (status %d)\n", 1253 dprintk("NFS: %4d nfs_writeback_done (status %d)\n",
1254 task->tk_pid, task->tk_status); 1254 task->tk_pid, task->tk_status);
1255 1255
1256 /* Call the NFS version-specific code */ 1256 /*
1257 * ->write_done will attempt to use post-op attributes to detect
1258 * conflicting writes by other clients. A strict interpretation
1259 * of close-to-open would allow us to continue caching even if
1260 * another writer had changed the file, but some applications
1261 * depend on tighter cache coherency when writing.
1262 */
1257 status = NFS_PROTO(data->inode)->write_done(task, data); 1263 status = NFS_PROTO(data->inode)->write_done(task, data);
1258 if (status != 0) 1264 if (status != 0)
1259 return status; 1265 return status;