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[06/20] nfsd: add fh_fsid_match helper

Message ID 1421925006-24231-7-git-send-email-hch@lst.de (mailing list archive)
State New, archived
Headers show

Commit Message

Christoph Hellwig Jan. 22, 2015, 11:09 a.m. UTC 
Add a helper to check that the fsid parts of two file handles match.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 fs/nfsd/nfsfh.h | 9 +++++++++
 1 file changed, 9 insertions(+)
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Patch

diff --git a/fs/nfsd/nfsfh.h b/fs/nfsd/nfsfh.h
index e24d954..84cae20 100644
--- a/fs/nfsd/nfsfh.h
+++ b/fs/nfsd/nfsfh.h
@@ -196,6 +196,15 @@  static inline bool fh_match(struct knfsd_fh *fh1, struct knfsd_fh *fh2)
 	return true;
 }
 
+static inline bool fh_fsid_match(struct knfsd_fh *fh1, struct knfsd_fh *fh2)
+{
+	if (fh1->fh_fsid_type != fh2->fh_fsid_type)
+		return false;
+	if (memcmp(fh1->fh_fsid, fh2->fh_fsid, key_len(fh1->fh_fsid_type) != 0))
+		return false;
+	return true;
+}
+
 #ifdef CONFIG_NFSD_V3
 /*
  * The wcc data stored in current_fh should be cleared