vfs: Implement streams_depot_fstatat()

So far we don't call FSTATAT on streams, but this might change soon.

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>

diff --git a/source3/modules/vfs_streams_depot.c b/source3/modules/vfs_streams_depot.c
index cc69f7f21edbad16df465d92d56d38ec50b2c526..dd4f8f524f81a30b06c0823fd50208001f50e62e 100644 (file)
--- a/source3/modules/vfs_streams_depot.c
+++ b/source3/modules/vfs_streams_depot.c
@@ -670,6 +670,63 @@ static int streams_depot_lstat(vfs_handle_struct *handle,
        return ret;
 }
 
+static int streams_depot_fstatat(struct vfs_handle_struct *handle,
+                                const struct files_struct *dirfsp,
+                                const struct smb_filename *smb_fname,
+                                SMB_STRUCT_STAT *sbuf,
+                                int flags)
+{
+       struct smb_filename *smb_fname_stream = NULL;
+       struct smb_filename *base_fname = NULL;
+       NTSTATUS status;
+       int ret = -1;
+
+       DBG_DEBUG("called for [%s/%s]\n",
+                 dirfsp->fsp_name->base_name,
+                 smb_fname_str_dbg(smb_fname));
+
+       if (!is_named_stream(smb_fname)) {
+               return SMB_VFS_NEXT_FSTATAT(
+                       handle, dirfsp, smb_fname, sbuf, flags);
+       }
+
+       base_fname = cp_smb_filename_nostream(talloc_tos(), smb_fname);
+       if (base_fname == NULL) {
+               errno = ENOMEM;
+               goto done;
+       }
+
+       ret = SMB_VFS_NEXT_FSTATAT(
+               handle, dirfsp, base_fname, &base_fname->st, flags);
+       if (ret == -1) {
+               goto done;
+       }
+
+       /* lstat the actual stream now. */
+       status = stream_smb_fname(
+               handle, &base_fname->st, smb_fname, &smb_fname_stream, false);
+       if (!NT_STATUS_IS_OK(status)) {
+               ret = -1;
+               errno = map_errno_from_nt_status(status);
+               goto done;
+       }
+
+       ret = SMB_VFS_NEXT_LSTAT(handle, smb_fname_stream);
+
+       if (ret == 0) {
+               *sbuf = smb_fname_stream->st;
+       }
+
+ done:
+       {
+               int err = errno;
+               TALLOC_FREE(smb_fname_stream);
+               TALLOC_FREE(base_fname);
+               errno = err;
+       }
+       return ret;
+}
+
 static int streams_depot_openat(struct vfs_handle_struct *handle,
                                const struct files_struct *dirfsp,
                                const struct smb_filename *smb_fname,
@@ -1223,6 +1280,7 @@ static struct vfs_fn_pointers vfs_streams_depot_fns = {
        .openat_fn = streams_depot_openat,
        .stat_fn = streams_depot_stat,
        .lstat_fn = streams_depot_lstat,
+       .fstatat_fn = streams_depot_fstatat,
        .unlinkat_fn = streams_depot_unlinkat,
        .renameat_fn = streams_depot_renameat,
        .fstreaminfo_fn = streams_depot_fstreaminfo,