smbd: Make get_real_filename_cache_key() static in files.c

[samba.git] / source3 / smbd / files.c

diff --git a/source3/smbd/files.c b/source3/smbd/files.c
index b94468ad6afd7da1700115256cb771c2dedbe8ea..28a741c8b54d69dc7b533bbb5cf84273201cc996 100644 (file)
--- a/source3/smbd/files.c
+++ b/source3/smbd/files.c
@@ -832,6 +832,55 @@ NTSTATUS create_open_symlink_err(TALLOC_CTX *mem_ctx,
        return NT_STATUS_OK;
 }
 
+/*
+ * Create the memcache-key for GETREALFILENAME_CACHE: This supplements
+ * the stat cache for the last component to be looked up. Cache
+ * contents is the correctly capitalized translation of the parameter
+ * "name" as it exists on disk. This is indexed by inode of the dirfsp
+ * and name, and contrary to stat_cahce_lookup() it does not
+ * vfs_stat() the last component. This will be taken care of by an
+ * attempt to do a openat_pathref_fsp().
+ */
+static bool get_real_filename_cache_key(TALLOC_CTX *mem_ctx,
+                                       struct files_struct *dirfsp,
+                                       const char *name,
+                                       DATA_BLOB *_key)
+{
+       struct file_id fid = vfs_file_id_from_sbuf(dirfsp->conn,
+                                                  &dirfsp->fsp_name->st);
+       char *upper = NULL;
+       uint8_t *key = NULL;
+       size_t namelen, keylen;
+
+       upper = talloc_strdup_upper(mem_ctx, name);
+       if (upper == NULL) {
+               return false;
+       }
+       namelen = talloc_get_size(upper);
+
+       keylen = namelen + sizeof(fid);
+       if (keylen < sizeof(fid)) {
+               TALLOC_FREE(upper);
+               return false;
+       }
+
+       key = talloc_size(mem_ctx, keylen);
+       if (key == NULL) {
+               TALLOC_FREE(upper);
+               return false;
+       }
+
+       memcpy(key, &fid, sizeof(fid));
+       memcpy(key + sizeof(fid), upper, namelen);
+       TALLOC_FREE(upper);
+
+       *_key = (DATA_BLOB){
+               .data = key,
+               .length = keylen,
+       };
+       return true;
+}
+
 static int smb_vfs_openat_ci(TALLOC_CTX *mem_ctx,
                             bool case_sensitive,
                             struct connection_struct *conn,