autofs/SOURCES/autofs-5.1.8-fix-kernel-mount-status-notification.patch

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2022-02-01 18:15:44 +00:00
autofs-5.1.8 - fix kernel mount status notification
From: Ian Kent <raven@themaw.net>
The status return for attempted mount notification is not done
correctly in some cases leading to a status being sent to the
kernel multiple times or the send causing an error.
We must send a status to the kernel but it needs to be the correct
one. It definitely shouldn't be sent twice for the same mount attempt
and shouldn't be failing.
Signed-off-by: Ian Kent <raven@themaw.net>
---
CHANGELOG | 1 +
daemon/direct.c | 19 +++++++++++--------
daemon/indirect.c | 19 +++++++++++--------
3 files changed, 23 insertions(+), 16 deletions(-)
--- autofs-5.1.7.orig/CHANGELOG
+++ autofs-5.1.7/CHANGELOG
@@ -80,6 +80,7 @@
- fix concat_options() error handling.
- eliminate some more alloca usage.
- use default stack size for threads.
+- fix kernel mount status notification.
25/01/2021 autofs-5.1.7
- make bind mounts propagation slave by default.
--- autofs-5.1.7.orig/daemon/direct.c
+++ autofs-5.1.7/daemon/direct.c
@@ -1143,12 +1143,18 @@ int handle_packet_expire_direct(struct a
return 0;
}
-static void mount_send_fail(void *arg)
+static void mount_send_status(void *arg)
{
struct ioctl_ops *ops = get_ioctl_ops();
struct pending_args *mt = arg;
struct autofs_point *ap = mt->ap;
- ops->send_fail(ap->logopt, mt->ioctlfd, mt->wait_queue_token, -ENOENT);
+
+ if (mt->status)
+ ops->send_fail(ap->logopt, mt->ioctlfd,
+ mt->wait_queue_token, mt->status);
+ else
+ ops->send_ready(ap->logopt,
+ mt->ioctlfd, mt->wait_queue_token);
ops->close(ap->logopt, mt->ioctlfd);
}
@@ -1177,7 +1183,8 @@ static void *do_mount_direct(void *arg)
pending_mutex_unlock(args);
- pthread_cleanup_push(mount_send_fail, &mt);
+ mt.status = 0;
+ pthread_cleanup_push(mount_send_status, &mt);
pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &state);
@@ -1191,9 +1198,7 @@ static void *do_mount_direct(void *arg)
if (status == -1) {
error(ap->logopt,
"can't stat direct mount trigger %s", mt.name);
- ops->send_fail(ap->logopt,
- mt.ioctlfd, mt.wait_queue_token, -ENOENT);
- ops->close(ap->logopt, mt.ioctlfd);
+ mt.status = -ENOENT;
pthread_setcancelstate(state, NULL);
pthread_exit(NULL);
}
@@ -1203,8 +1208,6 @@ static void *do_mount_direct(void *arg)
error(ap->logopt,
"direct trigger not valid or already mounted %s",
mt.name);
- ops->send_ready(ap->logopt, mt.ioctlfd, mt.wait_queue_token);
- ops->close(ap->logopt, mt.ioctlfd);
pthread_setcancelstate(state, NULL);
pthread_exit(NULL);
}
--- autofs-5.1.7.orig/daemon/indirect.c
+++ autofs-5.1.7/daemon/indirect.c
@@ -674,13 +674,18 @@ int handle_packet_expire_indirect(struct
return 0;
}
-static void mount_send_fail(void *arg)
+static void mount_send_status(void *arg)
{
struct ioctl_ops *ops = get_ioctl_ops();
struct pending_args *mt = arg;
struct autofs_point *ap = mt->ap;
- ops->send_fail(ap->logopt,
- ap->ioctlfd, mt->wait_queue_token, -ENOENT);
+
+ if (mt->status)
+ ops->send_fail(ap->logopt, ap->ioctlfd,
+ mt->wait_queue_token, mt->status);
+ else
+ ops->send_ready(ap->logopt,
+ ap->ioctlfd, mt->wait_queue_token);
}
static void *do_mount_indirect(void *arg)
@@ -709,7 +714,8 @@ static void *do_mount_indirect(void *arg
pending_mutex_unlock(args);
- pthread_cleanup_push(mount_send_fail, &mt);
+ mt.status = 0;
+ pthread_cleanup_push(mount_send_status, &mt);
pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &state);
@@ -722,9 +728,7 @@ static void *do_mount_indirect(void *arg
len = ncat_path(buf, sizeof(buf), ap->path, mt.name, mt.len);
if (!len) {
crit(ap->logopt, "path to be mounted is to long");
- ops->send_fail(ap->logopt,
- ap->ioctlfd, mt.wait_queue_token,
- -ENAMETOOLONG);
+ mt.status = -ENAMETOOLONG;
pthread_setcancelstate(state, NULL);
pthread_exit(NULL);
}
@@ -733,7 +737,6 @@ static void *do_mount_indirect(void *arg
if (status != -1 && !(S_ISDIR(st.st_mode) && st.st_dev == mt.dev)) {
error(ap->logopt,
"indirect trigger not valid or already mounted %s", buf);
- ops->send_ready(ap->logopt, ap->ioctlfd, mt.wait_queue_token);
pthread_setcancelstate(state, NULL);
pthread_exit(NULL);
}