s3: VFS: vfs_shadow_copy2. 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_shadow_copy2.c b/source3/modules/vfs_shadow_copy2.c
index 070ae06328bc757ce2294502386ba40fffe768f3..31f2567f1144b3a6d35a76600f64bbdbc014e37f 100644 (file)
--- a/source3/modules/vfs_shadow_copy2.c
+++ b/source3/modules/vfs_shadow_copy2.c
@@ -1226,6 +1226,51 @@ static int shadow_copy2_symlink(vfs_handle_struct *handle,
        return SMB_VFS_NEXT_SYMLINK(handle, link_contents, new_smb_fname);
 }
 
+static int shadow_copy2_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;
+       char *snappath_old = NULL;
+       char *snappath_new = NULL;
+
+       if (!shadow_copy2_strip_snapshot_internal(talloc_tos(),
+                               handle,
+                               link_contents,
+                               &timestamp_old,
+                               NULL,
+                               &snappath_old,
+                               NULL)) {
+               return -1;
+       }
+       if (!shadow_copy2_strip_snapshot_internal(talloc_tos(),
+                               handle,
+                               new_smb_fname->base_name,
+                               &timestamp_new,
+                               NULL,
+                               &snappath_new,
+                               NULL)) {
+               return -1;
+       }
+       if ((timestamp_old != 0) || (timestamp_new != 0)) {
+               errno = EROFS;
+               return -1;
+       }
+       /*
+        * Don't allow symlinks on already converted paths.
+        */
+       if ((snappath_old != NULL) || (snappath_new != NULL)) {
+               errno = EROFS;
+               return -1;
+       }
+       return SMB_VFS_NEXT_SYMLINKAT(handle,
+                               link_contents,
+                               dirfsp,
+                               new_smb_fname);
+}
+
 static int shadow_copy2_linkat(vfs_handle_struct *handle,
                        files_struct *srcfsp,
                        const struct smb_filename *old_smb_fname,
@@ -3154,6 +3199,7 @@ static struct vfs_fn_pointers vfs_shadow_copy2_fns = {
        .renameat_fn = shadow_copy2_renameat,
        .linkat_fn = shadow_copy2_linkat,
        .symlink_fn = shadow_copy2_symlink,
+       .symlinkat_fn = shadow_copy2_symlinkat,
        .stat_fn = shadow_copy2_stat,
        .lstat_fn = shadow_copy2_lstat,
        .fstat_fn = shadow_copy2_fstat,