s3: VFS: vfs_snapper. Implement symlinkat().

Currently identical to symlink().

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Ralph Böhme <slow@samba.org>

diff --git a/source3/modules/vfs_snapper.c b/source3/modules/vfs_snapper.c
index bf631ff25bcf2120f25d8cbb2bb4fd7aa8b827cb..60b78f5e3946dec48188846a95cf748c17e0abed 100644 (file)
--- a/source3/modules/vfs_snapper.c
+++ b/source3/modules/vfs_snapper.c
@@ -2042,7 +2042,6 @@ static int snapper_gmt_renameat(vfs_handle_struct *handle,
                        smb_fname_dst);
 }
 
-
 static int snapper_gmt_symlink(vfs_handle_struct *handle,
                                const char *link_contents,
                                const struct smb_filename *new_smb_fname)
@@ -2071,6 +2070,38 @@ static int snapper_gmt_symlink(vfs_handle_struct *handle,
        return SMB_VFS_NEXT_SYMLINK(handle, link_contents, new_smb_fname);
 }
 
+static int snapper_gmt_symlinkat(vfs_handle_struct *handle,
+                               const char *link_contents,
+                               struct files_struct *dirfsp,
+                               const struct smb_filename *new_smb_fname)
+{
+       time_t timestamp_old = 0;
+       time_t timestamp_new = 0;
+
+       if (!snapper_gmt_strip_snapshot(talloc_tos(),
+                               handle,
+                               link_contents,
+                               &timestamp_old,
+                               NULL)) {
+               return -1;
+       }
+       if (!snapper_gmt_strip_snapshot(talloc_tos(),
+                               handle,
+                               new_smb_fname->base_name,
+                               &timestamp_new,
+                               NULL)) {
+               return -1;
+       }
+       if ((timestamp_old != 0) || (timestamp_new != 0)) {
+               errno = EROFS;
+               return -1;
+       }
+       return SMB_VFS_NEXT_SYMLINKAT(handle,
+                       link_contents,
+                       dirfsp,
+                       new_smb_fname);
+}
+
 static int snapper_gmt_linkat(vfs_handle_struct *handle,
                                files_struct *srcfsp,
                                const struct smb_filename *old_smb_fname,
@@ -2886,6 +2917,7 @@ static struct vfs_fn_pointers snapper_fns = {
        .renameat_fn = snapper_gmt_renameat,
        .linkat_fn = snapper_gmt_linkat,
        .symlink_fn = snapper_gmt_symlink,
+       .symlinkat_fn = snapper_gmt_symlinkat,
        .stat_fn = snapper_gmt_stat,
        .lstat_fn = snapper_gmt_lstat,
        .open_fn = snapper_gmt_open,