From: Ralph Boehme <slow@samba.org>
Date: Wed, 20 May 2020 20:02:48 +0000 (+0200)
Subject: vfs_snapper: implement SMB_VFS_OPENAT()
X-Git-Tag: ldb-2.2.0~381
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6bd623771ed5517952df84214f9f2aa908f24cbd;p=thirdparty%2Fsamba.git

vfs_snapper: implement SMB_VFS_OPENAT()

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

diff --git a/source3/modules/vfs_snapper.c b/source3/modules/vfs_snapper.c
index 9108422df49..20d2dd6d369 100644
--- a/source3/modules/vfs_snapper.c
+++ b/source3/modules/vfs_snapper.c
@@ -2110,6 +2110,60 @@ static int snapper_gmt_open(vfs_handle_struct *handle,
 	return ret;
 }
 
+static int snapper_gmt_openat(struct vfs_handle_struct *handle,
+			      const struct files_struct *dirfsp,
+			      const struct smb_filename *smb_fname_in,
+			      struct files_struct *fsp,
+			      int flags,
+			      mode_t mode)
+{
+	struct smb_filename *smb_fname = NULL;
+	time_t timestamp;
+	char *stripped = NULL;
+	int ret;
+	int saved_errno = 0;
+
+	if (!snapper_gmt_strip_snapshot(talloc_tos(), handle,
+					smb_fname_in,
+					&timestamp, &stripped)) {
+		return -1;
+	}
+	if (timestamp == 0) {
+		return SMB_VFS_NEXT_OPENAT(handle,
+					   dirfsp,
+					   smb_fname_in,
+					   fsp,
+					   flags,
+					   mode);
+	}
+
+	smb_fname = cp_smb_filename(talloc_tos(), smb_fname_in);
+	if (smb_fname == NULL) {
+		TALLOC_FREE(stripped);
+		return -1;
+	}
+
+	smb_fname->base_name = snapper_gmt_convert(smb_fname, handle,
+						   stripped, timestamp);
+	TALLOC_FREE(stripped);
+
+	if (smb_fname->base_name == NULL) {
+		TALLOC_FREE(smb_fname);
+		errno = ENOMEM;
+		return -1;
+	}
+
+	ret = SMB_VFS_NEXT_OPENAT(handle, dirfsp, smb_fname, fsp, flags, mode);
+	if (ret == -1) {
+		saved_errno = errno;
+	}
+	TALLOC_FREE(smb_fname);
+	if (saved_errno != 0) {
+		errno = saved_errno;
+	}
+	return ret;
+}
+
 static int snapper_gmt_unlinkat(vfs_handle_struct *handle,
 			struct files_struct *dirfsp,
 			const struct smb_filename *smb_fname,
@@ -2764,6 +2818,7 @@ static struct vfs_fn_pointers snapper_fns = {
 	.stat_fn = snapper_gmt_stat,
 	.lstat_fn = snapper_gmt_lstat,
 	.open_fn = snapper_gmt_open,
+	.openat_fn = snapper_gmt_openat,
 	.unlinkat_fn = snapper_gmt_unlinkat,
 	.chmod_fn = snapper_gmt_chmod,
 	.chdir_fn = snapper_gmt_chdir,