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authorGravatar Gabriel Krisman Bertazi <krisman@suse.de> 2024-02-21 12:14:08 -0500
committerGravatar Gabriel Krisman Bertazi <krisman@suse.de> 2024-02-27 16:55:34 -0500
commit70dfe3f0d239c2e8abc6a7bea24411031f85b652 (patch)
treee3ec8120884b9c412c92017300b564009e3aaa1d /fs/libfs.c
parentlibfs: Merge encrypted_ci_dentry_ops and ci_dentry_ops (diff)
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libfs: Add helper to choose dentry operations at mount-time
In preparation to drop the similar helper that sets d_op at lookup time, add a version to set the right d_op filesystem-wide, through sb->s_d_op. The operations structures are shared across filesystems supporting fscrypt and/or casefolding, therefore we can keep it in common libfs code. Reviewed-by: Eric Biggers <ebiggers@google.com> Link: https://lore.kernel.org/r/20240221171412.10710-7-krisman@suse.de Signed-off-by: Gabriel Krisman Bertazi <krisman@suse.de>
Diffstat (limited to 'fs/libfs.c')
-rw-r--r--fs/libfs.c28
1 files changed, 28 insertions, 0 deletions
diff --git a/fs/libfs.c b/fs/libfs.c
index 3993453c9787..c9d85f525ae8 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -1819,6 +1819,34 @@ void generic_set_encrypted_ci_d_ops(struct dentry *dentry)
EXPORT_SYMBOL(generic_set_encrypted_ci_d_ops);
/**
+ * generic_set_sb_d_ops - helper for choosing the set of
+ * filesystem-wide dentry operations for the enabled features
+ * @sb: superblock to be configured
+ *
+ * Filesystems supporting casefolding and/or fscrypt can call this
+ * helper at mount-time to configure sb->s_d_op to best set of dentry
+ * operations required for the enabled features. The helper must be
+ * called after these have been configured, but before the root dentry
+ * is created.
+ */
+void generic_set_sb_d_ops(struct super_block *sb)
+{
+#if IS_ENABLED(CONFIG_UNICODE)
+ if (sb->s_encoding) {
+ sb->s_d_op = &generic_ci_dentry_ops;
+ return;
+ }
+#endif
+#ifdef CONFIG_FS_ENCRYPTION
+ if (sb->s_cop) {
+ sb->s_d_op = &generic_encrypted_dentry_ops;
+ return;
+ }
+#endif
+}
+EXPORT_SYMBOL(generic_set_sb_d_ops);
+
+/**
* inode_maybe_inc_iversion - increments i_version
* @inode: inode with the i_version that should be updated
* @force: increment the counter even if it's not necessary?