From: Jeremy Allison <jra@samba.org>
Date: Thu, 12 Sep 2019 20:21:41 +0000 (-0700)
Subject: s3: VFS: vfs_snapper. Implement unlinkat().
X-Git-Tag: talloc-2.3.1~634
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=62f92f8b29a4d860ee0062de27edb466f699633d;p=thirdparty%2Fsamba.git

s3: VFS: vfs_snapper. 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_snapper.c b/source3/modules/vfs_snapper.c
index 2a4ebb48ec3..9f3d876317d 100644
--- a/source3/modules/vfs_snapper.c
+++ b/source3/modules/vfs_snapper.c
@@ -2236,6 +2236,28 @@ static int snapper_gmt_unlink(vfs_handle_struct *handle,
 	return SMB_VFS_NEXT_UNLINK(handle, smb_fname);
 }
 
+static int snapper_gmt_unlinkat(vfs_handle_struct *handle,
+			struct files_struct *dirfsp,
+			const struct smb_filename *smb_fname,
+			int flags)
+{
+	time_t timestamp = 0;
+
+	if (!snapper_gmt_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 snapper_gmt_chmod(vfs_handle_struct *handle,
 			const struct smb_filename *smb_fname,
 			mode_t mode)
@@ -2897,6 +2919,7 @@ static struct vfs_fn_pointers snapper_fns = {
 	.lstat_fn = snapper_gmt_lstat,
 	.open_fn = snapper_gmt_open,
 	.unlink_fn = snapper_gmt_unlink,
+	.unlinkat_fn = snapper_gmt_unlinkat,
 	.chmod_fn = snapper_gmt_chmod,
 	.chown_fn = snapper_gmt_chown,
 	.chdir_fn = snapper_gmt_chdir,