From: Ralph Boehme <slow@samba.org>
Date: Sun, 27 May 2018 11:03:25 +0000 (+0200)
Subject: s3:locking: add file_has_open_streams()
X-Git-Tag: samba-4.7.10~56
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=279fa62a634ac7fc0e926a201cb7f547f4a2c1c2;p=thirdparty%2Fsamba.git

s3:locking: add file_has_open_streams()

This can be used to check if a file opened by fsp also has stream opens.

Bug: https://bugzilla.samba.org/show_bug.cgi?id=13451

Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
(cherry picked from commit dd8cf54c79fe8536e34cde15801d60931cd47b8b)
---

diff --git a/source3/locking/locking.c b/source3/locking/locking.c
index 4e9f1bbc681..f71cd176029 100644
--- a/source3/locking/locking.c
+++ b/source3/locking/locking.c
@@ -1318,3 +1318,34 @@ struct timespec get_share_mode_write_time(struct share_mode_lock *lck)
 	}
 	return d->old_write_time;
 }
+
+bool file_has_open_streams(files_struct *fsp)
+{
+	struct share_mode_lock *lock = NULL;
+	struct share_mode_data *d = NULL;
+	uint32_t i;
+
+	lock = get_existing_share_mode_lock(talloc_tos(), fsp->file_id);
+	if (lock == NULL) {
+		return false;
+	}
+	d = lock->data;
+
+	for (i = 0; i < d->num_share_modes; i++) {
+		struct share_mode_entry *e = &d->share_modes[i];
+
+		if (share_mode_stale_pid(d, i)) {
+			continue;
+		}
+
+		if (e->private_options &
+		    NTCREATEX_OPTIONS_PRIVATE_STREAM_BASEOPEN)
+		{
+			TALLOC_FREE(lock);
+			return true;
+		}
+	}
+
+	TALLOC_FREE(lock);
+	return false;
+}
diff --git a/source3/locking/proto.h b/source3/locking/proto.h
index 33184e0fa0a..4cd38091f3c 100644
--- a/source3/locking/proto.h
+++ b/source3/locking/proto.h
@@ -205,6 +205,7 @@ bool is_delete_on_close_set(struct share_mode_lock *lck, uint32_t name_hash);
 bool set_sticky_write_time(struct file_id fileid, struct timespec write_time);
 bool set_write_time(struct file_id fileid, struct timespec write_time);
 struct timespec get_share_mode_write_time(struct share_mode_lock *lck);
+bool file_has_open_streams(files_struct *fsp);
 int share_mode_forall(int (*fn)(struct file_id fid,
 				const struct share_mode_data *data,
 				void *private_data),