From: Jeremy Allison <jra@samba.org>
Date: Thu, 12 Sep 2019 20:19:39 +0000 (-0700)
Subject: s3: VFS: vfs_shadow_copy2. Implement unlinkat().
X-Git-Tag: talloc-2.3.1~635
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=43b9d9adfe3ac5135bee4918e2769cf912e12b7d;p=thirdparty%2Fsamba.git

s3: VFS: vfs_shadow_copy2. Implement unlinkat().

This is identical to unlink(), as there
are no special cases needed for rmdir().

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

diff --git a/source3/modules/vfs_shadow_copy2.c b/source3/modules/vfs_shadow_copy2.c
index 5417c9f3b82..da8097ca58f 100644
--- a/source3/modules/vfs_shadow_copy2.c
+++ b/source3/modules/vfs_shadow_copy2.c
@@ -1511,6 +1511,28 @@ static int shadow_copy2_unlink(vfs_handle_struct *handle,
 	return SMB_VFS_NEXT_UNLINK(handle, smb_fname);
 }
 
+static int shadow_copy2_unlinkat(vfs_handle_struct *handle,
+			struct files_struct *dirfsp,
+			const struct smb_filename *smb_fname,
+			int flags)
+{
+	time_t timestamp = 0;
+
+	if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
+					 smb_fname->base_name,
+					 &timestamp, NULL)) {
+		return -1;
+	}
+	if (timestamp != 0) {
+		errno = EROFS;
+		return -1;
+	}
+	return SMB_VFS_NEXT_UNLINKAT(handle,
+			dirfsp,
+			smb_fname,
+			flags);
+}
+
 static int shadow_copy2_chmod(vfs_handle_struct *handle,
 			const struct smb_filename *smb_fname,
 			mode_t mode)
@@ -3166,6 +3188,7 @@ static struct vfs_fn_pointers vfs_shadow_copy2_fns = {
 	.fstat_fn = shadow_copy2_fstat,
 	.open_fn = shadow_copy2_open,
 	.unlink_fn = shadow_copy2_unlink,
+	.unlinkat_fn = shadow_copy2_unlinkat,
 	.chmod_fn = shadow_copy2_chmod,
 	.chown_fn = shadow_copy2_chown,
 	.chdir_fn = shadow_copy2_chdir,