diff mbox series

[4/7] libfs: Support revalidation of encrypted case-insensitive dentries

Message ID 20220622194603.102655-5-krisman@collabora.com (mailing list archive)
State New, archived
Headers show
Series Support negative dentries on case-insensitive directories | expand

Commit Message

Gabriel Krisman Bertazi June 22, 2022, 7:46 p.m. UTC 
Preserve the existing behavior for encrypted directories, by rejecting
negative dentries of encrypted+casefolded directories.  This allows
generic_ci_d_revalidate to be used by filesystems with both features
enabled, as long as the directory is either casefolded or encrypted, but
not both at the same time.

Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>
---
 fs/libfs.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

Comments

Theodore Ts'o March 23, 2023, 2:37 p.m. UTC | #1 
On Wed, Jun 22, 2022 at 03:46:00PM -0400, Gabriel Krisman Bertazi wrote:
> Preserve the existing behavior for encrypted directories, by rejecting
> negative dentries of encrypted+casefolded directories.  This allows
> generic_ci_d_revalidate to be used by filesystems with both features
> enabled, as long as the directory is either casefolded or encrypted, but
> not both at the same time.
> 
> Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>

Reviewed-by: Theodore Ts'o <tytso@mit.edu>
diff mbox series

Patch

diff --git a/fs/libfs.c b/fs/libfs.c
index de43f3f585f1..e4da68ebd618 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -1461,6 +1461,9 @@  static inline int generic_ci_d_revalidate(struct dentry *dentry,
 		const struct inode *dir = READ_ONCE(parent->d_inode);
 
 		if (dir && needs_casefold(dir)) {
+			if (IS_ENCRYPTED(dir))
+				return 0;
+
 			if (!d_is_casefold_lookup(dentry))
 				return 0;
 
@@ -1470,7 +1473,8 @@  static inline int generic_ci_d_revalidate(struct dentry *dentry,
 				return 0;
 		}
 	}
-	return 1;
+
+	return fscrypt_d_revalidate(dentry, flags);
 }
 
 static const struct dentry_operations generic_ci_dentry_ops = {
@@ -1490,7 +1494,7 @@  static const struct dentry_operations generic_encrypted_dentry_ops = {
 static const struct dentry_operations generic_encrypted_ci_dentry_ops = {
 	.d_hash = generic_ci_d_hash,
 	.d_compare = generic_ci_d_compare,
-	.d_revalidate = fscrypt_d_revalidate,
+	.d_revalidate_name = generic_ci_d_revalidate,
 };
 #endif