diff options
| -rw-r--r-- | tools/virtiofsd/passthrough_ll.c | 27 |
1 files changed, 25 insertions, 2 deletions
diff --git a/tools/virtiofsd/passthrough_ll.c b/tools/virtiofsd/passthrough_ll.c index f7b9c1d20c..d7a6474b6e 100644 --- a/tools/virtiofsd/passthrough_ll.c +++ b/tools/virtiofsd/passthrough_ll.c @@ -2536,6 +2536,8 @@ static void print_capabilities(void) static void setup_namespaces(struct lo_data *lo, struct fuse_session *se) { pid_t child; + char template[] = "virtiofsd-XXXXXX"; + char *tmpdir; /* * Create a new pid namespace for *child* processes. We'll have to @@ -2597,12 +2599,33 @@ static void setup_namespaces(struct lo_data *lo, struct fuse_session *se) exit(1); } + tmpdir = mkdtemp(template); + if (!tmpdir) { + fuse_log(FUSE_LOG_ERR, "tmpdir(%s): %m\n", template); + exit(1); + } + + if (mount("/proc/self/fd", tmpdir, NULL, MS_BIND, NULL) < 0) { + fuse_log(FUSE_LOG_ERR, "mount(/proc/self/fd, %s, MS_BIND): %m\n", + tmpdir); + exit(1); + } + /* Now we can get our /proc/self/fd directory file descriptor */ - lo->proc_self_fd = open("/proc/self/fd", O_PATH); + lo->proc_self_fd = open(tmpdir, O_PATH); if (lo->proc_self_fd == -1) { - fuse_log(FUSE_LOG_ERR, "open(/proc/self/fd, O_PATH): %m\n"); + fuse_log(FUSE_LOG_ERR, "open(%s, O_PATH): %m\n", tmpdir); exit(1); } + + if (umount2(tmpdir, MNT_DETACH) < 0) { + fuse_log(FUSE_LOG_ERR, "umount2(%s, MNT_DETACH): %m\n", tmpdir); + exit(1); + } + + if (rmdir(tmpdir) < 0) { + fuse_log(FUSE_LOG_ERR, "rmdir(%s): %m\n", tmpdir); + } } /* |