LU-12137 osd-ldiskfs: migrate osd_ios_lookup_one_len() to osd_compat.c

[fs/lustre-release.git] / lustre / osd-ldiskfs / osd_compat.c

diff --git a/lustre/osd-ldiskfs/osd_compat.c b/lustre/osd-ldiskfs/osd_compat.c
index 8f231cb..ae42d2c 100644 (file)
--- a/lustre/osd-ldiskfs/osd_compat.c
+++ b/lustre/osd-ldiskfs/osd_compat.c
@@ -66,6 +66,42 @@ static void osd_push_ctxt(const struct osd_device *dev,
        push_ctxt(save, newctxt);
 }
 
+/**
+ * osd_ios_lookup_one_len - lookup single pathname component
+ *
+ * @name:      pathname component to lookup
+ * @base:      base directory to lookup from
+ * @len:       maximum length @len should be interpreted to
+ *
+ * Treat found dentry with NULL d_inode as an -ENOENT error so LFSCK
+ * can repair the file.
+ */
+struct dentry *osd_ios_lookup_one_len(const char *name, struct dentry *base,
+                                     int len)
+{
+       struct dentry *dentry;
+
+       dentry = ll_lookup_one_len(name, base, len);
+       if (IS_ERR(dentry)) {
+               int rc = PTR_ERR(dentry);
+
+               if (rc != -ENOENT)
+                       CERROR("Fail to find %.*s in %.*s (%lu/%u): rc = %d\n",
+                              len, name, base->d_name.len,
+                              base->d_name.name, base->d_inode->i_ino,
+                              base->d_inode->i_generation, rc);
+
+               return dentry;
+       }
+
+       if (dentry->d_inode == NULL) {
+               dput(dentry);
+               return ERR_PTR(-ENOENT);
+       }
+
+       return dentry;
+}
+
 /* utility to make a directory */
 static struct dentry *
 simple_mkdir(const struct lu_env *env, struct osd_device *osd,