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authorChristoph Hellwig <hch@lst.de>2010-10-06 10:48:20 +0200
committerAl Viro <viro@zeniv.linux.org.uk>2010-10-25 21:18:19 -0400
commitc37650161a53c01ddd88587675f9a4adc909a73e (patch)
tree85821998de9a6723dedc42488b9491db9692d1e3 /fs/fs-writeback.c
parent81fca444001e5a41ab80ce8cf9a5734c00ec6546 (diff)
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fs: add sync_inode_metadata
Add a new helper to write out the inode using the writeback code, that is including the correct dirty bit and list manipulation. A few of filesystems already opencode this, and a lot of others should be using it instead of using write_inode_now which also writes out the data. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/fs-writeback.c')
-rw-r--r--fs/fs-writeback.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index ab38fef1c9a..29e3f409bbd 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -1198,3 +1198,23 @@ int sync_inode(struct inode *inode, struct writeback_control *wbc)
return ret;
}
EXPORT_SYMBOL(sync_inode);
+
+/**
+ * sync_inode - write an inode to disk
+ * @inode: the inode to sync
+ * @wait: wait for I/O to complete.
+ *
+ * Write an inode to disk and adjust it's dirty state after completion.
+ *
+ * Note: only writes the actual inode, no associated data or other metadata.
+ */
+int sync_inode_metadata(struct inode *inode, int wait)
+{
+ struct writeback_control wbc = {
+ .sync_mode = wait ? WB_SYNC_ALL : WB_SYNC_NONE,
+ .nr_to_write = 0, /* metadata-only */
+ };
+
+ return sync_inode(inode, &wbc);
+}
+EXPORT_SYMBOL(sync_inode_metadata);