[PATCH RFC] refuse checkpoint of file with f_owner

["Serge E. Hallyn" <serue-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>]

... because we don't yet support its restore.

Signed-off-by: Serge E. Hallyn <serue-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
---
 checkpoint/files.c |   12 ++++++++++++
 1 files changed, 12 insertions(+), 0 deletions(-)

diff --git a/checkpoint/files.c b/checkpoint/files.c
index c8e8d7f..cac5236 100644
--- a/checkpoint/files.c
+++ b/checkpoint/files.c
@@ -261,6 +261,7 @@ static int checkpoint_file_desc(struct ckpt_ctx *ctx,
 	struct fdtable *fdt;
 	int objref, ret;
 	int coe = 0;	/* avoid gcc warning */
+	pid_t pid;
 
 	h = ckpt_hdr_get_type(ctx, sizeof(*h), CKPT_HDR_FILE_DESC);
 	if (!h)
@@ -283,6 +284,17 @@ static int checkpoint_file_desc(struct ckpt_ctx *ctx,
 	}
 
 	/*
+	 * TODO: Implement c/r of fowner and f_sigio.  Should be
+	 * trivial, but for now we just refuse its checkpoint
+	 */
+	pid = f_getown(file);
+	if (pid) {
+		ret = -EBUSY;
+		ckpt_err(ctx, ret, "%(T)fd %d has an owner (%d)\n", fd);
+		goto out;
+	}
+
+	/*
 	 * if seen first time, this will add 'file' to the objhash, keep
 	 * a reference to it, dump its state while at it.
 	 */
-- 
1.6.0.4