[CRIU] [PATCH 3/6] fowners: Add file owners dumping

[Cyrill Gorcunov]

Signed-off-by: Cyrill Gorcunov <gorcunov at openvz.org>
---
 cr-dump.c       |   34 ++++++++++++++++++++++++++++++++++
 include/files.h |    1 +
 2 files changed, 35 insertions(+), 0 deletions(-)

diff --git a/cr-dump.c b/cr-dump.c
index 90d828a..2b73e57 100644
--- a/cr-dump.c
+++ b/cr-dump.c
@@ -177,6 +177,7 @@ static int dump_one_reg_file(int lfd, u32 id, const struct fd_parms *p)
 	rfe.flags = p->flags;
 	rfe.pos = p->pos;
 	rfe.id = id;
+	rfe.fown = p->fown;
 
 	rfd = fdset_fd(glob_fdset, CR_FD_REG_FILES);
 
@@ -246,6 +247,7 @@ dump:
 	pe.id = id;
 	pe.pipe_id = p->id;
 	pe.flags = p->flags;
+	pe.fown = p->fown;
 
 	if (write_img(fd_pipes, &pe))
 		goto err_close;
@@ -381,6 +383,11 @@ static int dump_task_special_files(pid_t pid, const struct cr_fdset *cr_fdset)
 
 static int fill_fd_params(pid_t pid, int fd, int lfd, struct fd_parms *p)
 {
+	struct f_owner_ex owner_ex;
+	u32 v[2];
+
+	memzero(p, sizeof(*p));
+
 	if (fstat(lfd, &p->stat) < 0) {
 		pr_perror("Can't stat fd %d\n", lfd);
 		return -1;
@@ -395,6 +402,33 @@ static int fill_fd_params(pid_t pid, int fd, int lfd, struct fd_parms *p)
 	pr_info("%d fdinfo %d: pos: %16lx flags: %16o\n",
 		pid, fd, p->pos, p->flags);
 
+	p->fown.signum = fcntl(lfd, F_GETSIG, 0);
+	if (p->fown.signum < 0) {
+		pr_perror("Can't get owner signum on %d\n", lfd);
+		return -1;
+	}
+
+	if (fcntl(lfd, F_GETOWN_EX, (long)&owner_ex)) {
+		pr_perror("Can't get owners on %d\n", lfd);
+		return -1;
+	}
+
+	/*
+	 * Simple case -- nothing is changed.
+	 */
+	if (owner_ex.pid == 0)
+		return 0;
+
+	if (fcntl(lfd, F_GETOWNER_UIDS, (long)&v)) {
+		pr_perror("Can't get owner uids on %d\n", lfd);
+		return -1;
+	}
+
+	p->fown.uid	= v[0];
+	p->fown.euid	= v[1];
+	p->fown.pid_type= owner_ex.type;
+	p->fown.pid	= owner_ex.pid;
+
 	return 0;
 }
 
diff --git a/include/files.h b/include/files.h
index 5232e14..5d63db6 100644
--- a/include/files.h
+++ b/include/files.h
@@ -15,6 +15,7 @@ struct fd_parms {
 	struct stat	stat;
 	u32		id;
 	pid_t		pid;
+	fown_t		fown;
 };
 
 enum fdinfo_states {
-- 
1.7.7.6