s3: VFS: vfs_snapper. Implement linkat().

Currently identical to link().

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 4975cdf6fb4c05a7cea24e7e9d61deb23a6d857a..910591b1219cf773b6aa6d0ca62cb687d3e692c8 100644 (file)
--- a/source3/modules/vfs_snapper.c
+++ b/source3/modules/vfs_snapper.c
@@ -2099,6 +2099,42 @@ static int snapper_gmt_link(vfs_handle_struct *handle,
        return SMB_VFS_NEXT_LINK(handle, old_smb_fname, new_smb_fname);
 }
 
+static int snapper_gmt_linkat(vfs_handle_struct *handle,
+                               files_struct *srcfsp,
+                               const struct smb_filename *old_smb_fname,
+                               files_struct *dstfsp,
+                               const struct smb_filename *new_smb_fname,
+                               int flags)
+{
+       time_t timestamp_old = 0;
+       time_t timestamp_new = 0;
+
+       if (!snapper_gmt_strip_snapshot(talloc_tos(),
+                               handle,
+                               old_smb_fname->base_name,
+                               &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_LINKAT(handle,
+                               srcfsp,
+                               old_smb_fname,
+                               dstfsp,
+                               new_smb_fname,
+                               flags);
+}
+
 static int snapper_gmt_stat(vfs_handle_struct *handle,
                            struct smb_filename *smb_fname)
 {
@@ -2863,6 +2899,7 @@ static struct vfs_fn_pointers snapper_fns = {
        .get_quota_fn = snapper_gmt_get_quota,
        .renameat_fn = snapper_gmt_renameat,
        .link_fn = snapper_gmt_link,
+       .linkat_fn = snapper_gmt_linkat,
        .symlink_fn = snapper_gmt_symlink,
        .stat_fn = snapper_gmt_stat,
        .lstat_fn = snapper_gmt_lstat,