NFS: Create a v4-specific fsync function

v2 and v3 don't need to worry about doing a pnfs layoutcommit.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 32 insertions, 8 deletions

diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index a6708e6b438d..8941ac41c59b 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -265,7 +265,7 @@ nfs_file_mmap(struct file * file, struct vm_area_struct * vma)
  * fall back to doing a synchronous write.
  */
 static int
-nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync)
+nfs_file_fsync_commit(struct file *file, loff_t start, loff_t end, int datasync)
 {
         struct dentry *dentry = file->f_path.dentry;
         struct nfs_open_context *ctx = nfs_file_open_context(file);
@@ -277,9 +277,6 @@ nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync)
                         dentry->d_parent->d_name.name, dentry->d_name.name,
                         datasync);
 
-        ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
-        mutex_lock(&inode->i_mutex);
-
         nfs_inc_stats(inode, NFSIOS_VFSFSYNC);
         have_error = test_and_clear_bit(NFS_CONTEXT_ERROR_WRITE, &ctx->flags);
         status = nfs_commit_inode(inode, FLUSH_SYNC);
@@ -290,10 +287,20 @@ nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync)
                 ret = xchg(&ctx->error, 0);
         if (!ret && status < 0)
                 ret = status;
-        if (!ret && !datasync)
-                /* application has asked for meta-data sync */
-                ret = pnfs_layoutcommit_inode(inode, true);
+        return ret;
+}
+
+static int
+nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync)
+{
+        int ret;
+        struct inode *inode = file->f_path.dentry->d_inode;
+
+        ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
+        mutex_lock(&inode->i_mutex);
+        ret = nfs_file_fsync_commit(file, start, end, datasync);
         mutex_unlock(&inode->i_mutex);
+
         return ret;
 }
 
@@ -956,6 +963,23 @@ out_drop:
         goto out_put_ctx;
 }
 
+static int
+nfs4_file_fsync(struct file *file, loff_t start, loff_t end, int datasync)
+{
+        int ret;
+        struct inode *inode = file->f_path.dentry->d_inode;
+
+        ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
+        mutex_lock(&inode->i_mutex);
+        ret = nfs_file_fsync_commit(file, start, end, datasync);
+        if (!ret && !datasync)
+                /* application has asked for meta-data sync */
+                ret = pnfs_layoutcommit_inode(inode, true);
+        mutex_unlock(&inode->i_mutex);
+
+        return ret;
+}
+
 const struct file_operations nfs4_file_operations = {
         .llseek         = nfs_file_llseek,
         .read           = do_sync_read,
@@ -966,7 +990,7 @@ const struct file_operations nfs4_file_operations = {
         .open           = nfs4_file_open,
         .flush          = nfs_file_flush,
         .release        = nfs_file_release,
-        .fsync          = nfs_file_fsync,
+        .fsync          = nfs4_file_fsync,
         .lock           = nfs_lock,
         .flock          = nfs_flock,
         .splice_read    = nfs_file_splice_read,