From: Jeremy Allison <jra@samba.org>
Date: Fri, 30 Aug 2019 20:54:52 +0000 (-0700)
Subject: s3: VFS: vfs_snapper. Implement symlinkat().
X-Git-Tag: tevent-0.10.1~19
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=787487ae3ee7adcd68931d5834dbfc5e3ba1dce3;p=thirdparty%2Fsamba.git

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 bf631ff25bc..60b78f5e394 100644
--- 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,