git: 357492c99597 - main - nfscl: Add NFSD_CURVNET macros to nfsclient syscall

The branch main has been updated by rmacklem:

URL: https://cgit.FreeBSD.org/src/commit/?id=357492c99597d13bc966441f30bb44f6ef659f08

commit 357492c99597d13bc966441f30bb44f6ef659f08
Author:     Rick Macklem <rmacklem@FreeBSD.org>
AuthorDate: 2023-02-21 00:40:07 +0000
Commit:     Rick Macklem <rmacklem@FreeBSD.org>
CommitDate: 2023-02-21 00:40:07 +0000

    nfscl: Add NFSD_CURVNET macros to nfsclient syscall
    
    Although the nfsclient syscall is used for client side,
    it does set up server side krpc for callbacks.  As such,
    it needs to have the vnet set.  This patch does this.
    Without this patch, the system would crash when the
    nfscbd(8) daemon was killed.
    
    Reported by:    freebsd@walstatt-de.de
    MFC after:      3 months
---
 sys/fs/nfsclient/nfs_clport.c | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/sys/fs/nfsclient/nfs_clport.c b/sys/fs/nfsclient/nfs_clport.c
index 7f9b18e9970a..7a47da3c07bf 100644
--- a/sys/fs/nfsclient/nfs_clport.c
+++ b/sys/fs/nfsclient/nfs_clport.c
@@ -1276,10 +1276,11 @@ nfssvc_nfscl(struct thread *td, struct nfssvc_args *uap)
 	struct mount *mp;
 	struct nfsmount *nmp;
 
+	NFSD_CURVNET_SET(NFSD_TD_TO_VNET(td));
 	if (uap->flag & NFSSVC_CBADDSOCK) {
 		error = copyin(uap->argp, (caddr_t)&nfscbdarg, sizeof(nfscbdarg));
 		if (error)
-			return (error);
+			goto out;
 		/*
 		 * Since we don't know what rights might be required,
 		 * pretend that we need them all. It is better to be too
@@ -1288,10 +1289,11 @@ nfssvc_nfscl(struct thread *td, struct nfssvc_args *uap)
 		error = fget(td, nfscbdarg.sock,
 		    cap_rights_init_one(&rights, CAP_SOCK_CLIENT), &fp);
 		if (error)
-			return (error);
+			goto out;
 		if (fp->f_type != DTYPE_SOCKET) {
 			fdrop(fp, td);
-			return (EPERM);
+			error = EPERM;
+			goto out;
 		}
 		error = nfscbd_addsock(fp);
 		fdrop(fp, td);
@@ -1300,12 +1302,14 @@ nfssvc_nfscl(struct thread *td, struct nfssvc_args *uap)
 			nfscl_enablecallb = 1;
 		}
 	} else if (uap->flag & NFSSVC_NFSCBD) {
-		if (uap->argp == NULL) 
-			return (EINVAL);
+		if (uap->argp == NULL) {
+			error = EINVAL;
+			goto out;
+		}
 		error = copyin(uap->argp, (caddr_t)&nfscbdarg2,
 		    sizeof(nfscbdarg2));
 		if (error)
-			return (error);
+			goto out;
 		error = nfscbd_nfsd(td, &nfscbdarg2);
 	} else if (uap->flag & NFSSVC_DUMPMNTOPTS) {
 		error = copyin(uap->argp, &dumpmntopts, sizeof(dumpmntopts));
@@ -1391,6 +1395,8 @@ nfssvc_nfscl(struct thread *td, struct nfssvc_args *uap)
 	} else {
 		error = EINVAL;
 	}
+out:
+	NFSD_CURVNET_RESTORE();
 	return (error);
 }