vfs: Implement streams_xattr_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_xattr.c b/source3/modules/vfs_streams_xattr.c
index 48c1e05da0f8e1ff9d2183cea28b09c9e5f5b68e..b392ddd5e469c2daa8d99c57e4e4523976cc1a9f 100644 (file)
--- a/source3/modules/vfs_streams_xattr.c
+++ b/source3/modules/vfs_streams_xattr.c
@@ -310,6 +310,84 @@ static int streams_xattr_lstat(vfs_handle_struct *handle,
        return SMB_VFS_NEXT_LSTAT(handle, smb_fname);
 }
 
+static int streams_xattr_fstatat(struct vfs_handle_struct *handle,
+                                const struct files_struct *dirfsp,
+                                const struct smb_filename *smb_fname,
+                                SMB_STRUCT_STAT *sbuf,
+                                int flags)
+{
+       char *xattr_name = NULL;
+       struct smb_filename *pathref = NULL;
+       struct files_struct *fsp = smb_fname->fsp;
+       ssize_t size;
+       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);
+       }
+
+       SET_STAT_INVALID(*sbuf);
+
+       /* Derive the xattr name to lookup. */
+       ret = streams_xattr_get_name(handle,
+                                    talloc_tos(),
+                                    smb_fname->stream_name,
+                                    &xattr_name);
+       if (ret != 0) {
+               errno = ret;
+               ret = -1;
+               goto done;
+       }
+
+       if (fsp == NULL) {
+               status = synthetic_pathref(talloc_tos(),
+                                          dirfsp,
+                                          smb_fname->base_name,
+                                          NULL,
+                                          NULL,
+                                          smb_fname->twrp,
+                                          smb_fname->flags,
+                                          &pathref);
+               if (!NT_STATUS_IS_OK(status)) {
+                       errno = ENOENT;
+                       ret = -1;
+                       goto done;
+               }
+               fsp = pathref->fsp;
+       } else {
+               fsp = fsp->base_fsp;
+       }
+
+       *sbuf = fsp->fsp_name->st;
+
+       size = get_xattr_size_fsp(fsp, xattr_name);
+       if (size == -1) {
+               errno = ENOENT;
+               ret = -1;
+               goto done;
+       }
+       sbuf->st_ex_size = size;
+       sbuf->st_ex_ino = hash_inode(sbuf, xattr_name);
+       sbuf->st_ex_mode &= ~S_IFMT;
+       sbuf->st_ex_mode |= S_IFREG;
+       sbuf->st_ex_blocks = sbuf->st_ex_size / STAT_ST_BLOCKSIZE + 1;
+
+done:
+       {
+               int err = errno;
+               TALLOC_FREE(pathref);
+               TALLOC_FREE(xattr_name);
+               errno = err;
+       }
+       return ret;
+}
+
 static int streams_xattr_openat(struct vfs_handle_struct *handle,
                                const struct files_struct *dirfsp,
                                const struct smb_filename *smb_fname,
@@ -1585,6 +1663,7 @@ static struct vfs_fn_pointers vfs_streams_xattr_fns = {
        .stat_fn = streams_xattr_stat,
        .fstat_fn = streams_xattr_fstat,
        .lstat_fn = streams_xattr_lstat,
+       .fstatat_fn = streams_xattr_fstatat,
        .pread_fn = streams_xattr_pread,
        .pwrite_fn = streams_xattr_pwrite,
        .pread_send_fn = streams_xattr_pread_send,