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From 8d166597076d87aae9d5f98144103386c79d6446 Mon Sep 17 00:00:00 2001
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From: Jan Synacek <jsynacek@redhat.com>
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Date: Fri, 31 Mar 2017 09:47:46 +0200
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Subject: [PATCH] namespace: don't fail on masked mounts
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Before this patch, a service file with ReadWriteDirectories=/file...
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could fail if the file exists but is not a mountpoint, despite being
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listed in /proc/self/mountinfo. It could happen with masked mounts.
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(cherry picked from commit 98df8089bea1b2407c46495b6c2eb76dda46c658)
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Resolves: #1433687
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---
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src/shared/util.c | 23 +++++++++++------------
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1 file changed, 11 insertions(+), 12 deletions(-)
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diff --git a/src/shared/util.c b/src/shared/util.c
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index 1070e32c4..3e13cc1fd 100644
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--- a/src/shared/util.c
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+++ b/src/shared/util.c
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@@ -7332,22 +7332,21 @@ int bind_remount_recursive(const char *prefix, bool ro) {
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if (r < 0)
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return r;
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- /* Try to reuse the original flag set, but
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- * don't care for errors, in case of
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- * obstructed mounts */
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+ /* Deal with mount points that are obstructed by a
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+ * later mount */
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+ r = path_is_mount_point(x, 0);
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+ if (r == -ENOENT || r == 0)
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+ continue;
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+ if (r < 0)
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+ return r;
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+
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+ /* Try to reuse the original flag set */
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orig_flags = 0;
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(void) get_mount_flags(x, &orig_flags);
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orig_flags &= ~MS_RDONLY;
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- if (mount(NULL, x, NULL, orig_flags|MS_BIND|MS_REMOUNT|(ro ? MS_RDONLY : 0), NULL) < 0) {
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-
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- /* Deal with mount points that are
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- * obstructed by a later mount */
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-
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- if (errno != ENOENT)
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- return -errno;
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- }
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-
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+ if (mount(NULL, x, NULL, orig_flags|MS_BIND|MS_REMOUNT|(ro ? MS_RDONLY : 0), NULL) < 0)
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+ return -errno;
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}
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}
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}
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