git: 5830e7391d9f - stable/13 - nfscl: Allow "nolockd" to work for NFSv4 mounts

The branch stable/13 has been updated by rmacklem:

URL: https://cgit.FreeBSD.org/src/commit/?id=5830e7391d9f33e4b63ea9bfcc130a1547683bf2

commit 5830e7391d9f33e4b63ea9bfcc130a1547683bf2
Author:     Rick Macklem <rmacklem@FreeBSD.org>
AuthorDate: 2022-09-04 20:09:33 +0000
Commit:     Rick Macklem <rmacklem@FreeBSD.org>
CommitDate: 2022-09-18 22:13:07 +0000

    nfscl: Allow "nolockd" to work for NFSv4 mounts
    
    Commit 40ada74ee1da modified the NFSv4.1/4.2 client so
    that it would issue a DestroySession to the server when
    all session slots are marked bad.  This handles the
    case where session slots get broken when "intr" or "soft"
    NFSv4 fairly well.1/4.2 mounts are done.
    
    There are two other cases where having an NFSv4.1/4.2
    RPC attempt terminate without completion can leave
    state in a non-determinate condition.
    
    One is file locking RPCs.  If the "nolockd" option is
    used, this avoids file locking RPCs by doing locking
    locally within the client.
    
    The other is Open locks, but since all FreeBSD Open
    locks are done with OPEN_SHARE_DENY_NONE, the locking
    state for these should not be critical.
    
    This patch enables use of "nolockd" for NFSv4 mounts,
    so that it can be combined with "intr" and/or "soft",
    making the latter more usable.
    
    Use of "intr" or "soft" NFSv4 mounts are still not
    recommended, but when combined with "nolockd" should
    now work fairly well.
    
    A man page update will be done as a separate commit.
    
    (cherry picked from commit 33721eb991d868dbcad4726872d95ddd8f04ec27)
---
 sys/fs/nfsclient/nfs_clvfsops.c |  4 ++--
 sys/fs/nfsclient/nfs_clvnops.c  | 52 ++++++++++++++++++++---------------------
 2 files changed, 28 insertions(+), 28 deletions(-)

diff --git a/sys/fs/nfsclient/nfs_clvfsops.c b/sys/fs/nfsclient/nfs_clvfsops.c
index 55941170fc69..be863cc9d70a 100644
--- a/sys/fs/nfsclient/nfs_clvfsops.c
+++ b/sys/fs/nfsclient/nfs_clvfsops.c
@@ -2130,8 +2130,8 @@ void nfscl_retopts(struct nfsmount *nmp, char *buffer, size_t buflen)
 	    ",noncontigwr", &buf, &blen);
 	nfscl_printopt(nmp, (nmp->nm_flag & (NFSMNT_NOLOCKD | NFSMNT_NFSV4)) ==
 	    0, ",lockd", &buf, &blen);
-	nfscl_printopt(nmp, (nmp->nm_flag & (NFSMNT_NOLOCKD | NFSMNT_NFSV4)) ==
-	    NFSMNT_NOLOCKD, ",nolockd", &buf, &blen);
+	nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_NOLOCKD) != 0, ",nolockd",
+	    &buf, &blen);
 	nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_RDIRPLUS) != 0, ",rdirplus",
 	    &buf, &blen);
 	nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_KERB) == 0, ",sec=sys",
diff --git a/sys/fs/nfsclient/nfs_clvnops.c b/sys/fs/nfsclient/nfs_clvnops.c
index a6040ce58290..a92875aae6ed 100644
--- a/sys/fs/nfsclient/nfs_clvnops.c
+++ b/sys/fs/nfsclient/nfs_clvnops.c
@@ -3283,7 +3283,32 @@ nfs_advlock(struct vop_advlock_args *ap)
 	error = NFSVOPLOCK(vp, LK_SHARED);
 	if (error != 0)
 		return (EBADF);
-	if (NFS_ISV4(vp) && (ap->a_flags & (F_POSIX | F_FLOCK)) != 0) {
+	nmp = VFSTONFS(vp->v_mount);
+	if (!NFS_ISV4(vp) || (nmp->nm_flag & NFSMNT_NOLOCKD) != 0) {
+		if ((nmp->nm_flag & NFSMNT_NOLOCKD) != 0) {
+			size = np->n_size;
+			NFSVOPUNLOCK(vp);
+			error = lf_advlock(ap, &(vp->v_lockf), size);
+		} else {
+			if (nfs_advlock_p != NULL)
+				error = nfs_advlock_p(ap);
+			else {
+				NFSVOPUNLOCK(vp);
+				error = ENOLCK;
+			}
+		}
+		if (error == 0 && ap->a_op == F_SETLK) {
+			error = NFSVOPLOCK(vp, LK_SHARED);
+			if (error == 0) {
+				/* Mark that a file lock has been acquired. */
+				NFSLOCKNODE(np);
+				np->n_flag |= NHASBEENLOCKED;
+				NFSUNLOCKNODE(np);
+				NFSVOPUNLOCK(vp);
+			}
+		}
+		return (error);
+	} else if ((ap->a_flags & (F_POSIX | F_FLOCK)) != 0) {
 		if (vp->v_type != VREG) {
 			error = EINVAL;
 			goto out;
@@ -3317,7 +3342,6 @@ nfs_advlock(struct vop_advlock_args *ap)
 		 * state structure cannot exist for the file.
 		 * Only done for "oneopenown" NFSv4.1/4.2 mounts.
 		 */
-		nmp = VFSTONFS(vp->v_mount);
 		if (NFSHASNFSV4N(nmp) && NFSHASONEOPENOWN(nmp)) {
 			NFSLOCKNODE(np);
 			np->n_flag |= NMIGHTBELOCKED;
@@ -3384,30 +3408,6 @@ nfs_advlock(struct vop_advlock_args *ap)
 			np->n_flag |= NHASBEENLOCKED;
 			NFSUNLOCKNODE(np);
 		}
-	} else if (!NFS_ISV4(vp)) {
-		if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NOLOCKD) != 0) {
-			size = VTONFS(vp)->n_size;
-			NFSVOPUNLOCK(vp);
-			error = lf_advlock(ap, &(vp->v_lockf), size);
-		} else {
-			if (nfs_advlock_p != NULL)
-				error = nfs_advlock_p(ap);
-			else {
-				NFSVOPUNLOCK(vp);
-				error = ENOLCK;
-			}
-		}
-		if (error == 0 && ap->a_op == F_SETLK) {
-			error = NFSVOPLOCK(vp, LK_SHARED);
-			if (error == 0) {
-				/* Mark that a file lock has been acquired. */
-				NFSLOCKNODE(np);
-				np->n_flag |= NHASBEENLOCKED;
-				NFSUNLOCKNODE(np);
-				NFSVOPUNLOCK(vp);
-			}
-		}
-		return (error);
 	} else
 		error = EOPNOTSUPP;
 out: