git: 99187c3a44c2 - main - prison_check_nfsd: Add check for enforce_statfs != 0

The branch main has been updated by rmacklem:

URL: https://cgit.FreeBSD.org/src/commit/?id=99187c3a44c2c3e168e462a30d45af075748195f

commit 99187c3a44c2c3e168e462a30d45af075748195f
Author:     Rick Macklem <rmacklem@FreeBSD.org>
AuthorDate: 2023-02-02 00:02:20 +0000
Commit:     Rick Macklem <rmacklem@FreeBSD.org>
CommitDate: 2023-02-02 00:02:20 +0000

    prison_check_nfsd: Add check for enforce_statfs != 0
    
    Since mountd(8) will not be able to do exports
    when running in a vnet prison if enforce_statfs is
    set to 0, add a check for this to prison_check_nfsd().
    
    Reviewed by:    jamie, markj
    MFC after:      2 months
    Differential Revision:  https://reviews.freebsd.org/D38189
---
 sys/kern/kern_jail.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/sys/kern/kern_jail.c b/sys/kern/kern_jail.c
index 0820de9d5ac0..4c1e3ff40c58 100644
--- a/sys/kern/kern_jail.c
+++ b/sys/kern/kern_jail.c
@@ -3491,6 +3491,8 @@ prison_check(struct ucred *cred1, struct ucred *cred2)
  * - The root directory (pr_root) of the prison must be
  *   a file system mount point, so the mountd can hang
  *   export information on it.
+ * - The prison's enforce_statfs cannot be 0, so that
+ *   mountd(8) can do exports.
  */
 bool
 prison_check_nfsd(struct ucred *cred)
@@ -3502,6 +3504,8 @@ prison_check_nfsd(struct ucred *cred)
 		return (false);
 	if ((cred->cr_prison->pr_root->v_vflag & VV_ROOT) == 0)
 		return (false);
+	if (cred->cr_prison->pr_enforce_statfs == 0)
+		return (false);
 	return (true);
 }