[f2fs-dev] [PATCH v2 2/8] fscrypt: Drop d_revalidate if key is available

[Gabriel Krisman Bertazi <krisman@suse.de>]

fscrypt dentries are always valid once the key is available.  Since the
key cannot be removed without evicting the dentry, we don't need to keep
retrying to revalidate it.

Signed-off-by: Gabriel Krisman Bertazi <krisman@suse.de>
---
 fs/crypto/fname.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/fs/crypto/fname.c b/fs/crypto/fname.c
index 7b3fc189593a..0457ba2d7d76 100644
--- a/fs/crypto/fname.c
+++ b/fs/crypto/fname.c
@@ -591,8 +591,15 @@ int fscrypt_d_revalidate(struct dentry *dentry, unsigned int flags)
 	 * reverting to no-key names without evicting the directory's inode
 	 * -- which implies eviction of the dentries in the directory.
 	 */
-	if (!(dentry->d_flags & DCACHE_NOKEY_NAME))
+	if (!(dentry->d_flags & DCACHE_NOKEY_NAME)) {
+		/*
+		 * If fscrypt is the only feature requiring
+		 * revalidation for this dentry, we can just disable it.
+		 */
+		if (dentry->d_op->d_revalidate == &fscrypt_d_revalidate)
+			d_set_always_valid(dentry);
 		return 1;
+	}
 
 	/*
 	 * No-key name; valid if the directory's key is still unavailable.
-- 
2.43.0



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