!96 backport patch from community

From: @wguanghao 
Reviewed-by: @swf504 
Signed-off-by: @swf504

0008-export-fix-handling-of-error-from-match_fsid.patch

@@ -0,0 +1,40 @@
+From 92a0f7d3cc7fc1206e0a763ab737f797b8946ca7 Mon Sep 17 00:00:00 2001
+From: NeilBrown <neilb@suse.de>
+Date: Wed, 25 Oct 2023 12:34:45 -0400
+Subject: [PATCH] export: fix handling of error from match_fsid()
+
+If match_fsid() returns -1 we shouldn't assume that the path definitely
+doesn't match the fsid, though it might not.
+This is a similar situation to where an export is expected to be a mount
+point, but is found not to be one.  So it can be handled the same way,
+by setting 'dev_missing'.
+This will only have an effect if no other path matched the fsid, which
+is what we want.
+
+The current code results in nothing being exported if any export point,
+or any mount point beneath a crossmnt export point, fails a 'stat'
+request, which is too harsh.
+
+Signed-off-by: NeilBrown <neilb@suse.de>
+Signed-off-by: Steve Dickson <steved@redhat.com>
+---
+ support/export/cache.c | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/support/export/cache.c b/support/export/cache.c
+index 19bbba5..e459502 100644
+--- a/support/export/cache.c
++++ b/support/export/cache.c
+@@ -858,7 +858,8 @@ static void nfsd_fh(int f)
+ 			case 0:
+ 				continue;
+ 			case -1:
+-				goto out;
++				dev_missing ++;
++				continue;
+ 			}
+ 			if (is_ipaddr_client(dom)
+ 					&& !ipaddr_client_matches(exp, ai))
+-- 
+1.8.3.1
+

0009-export-move-cache_open-before-workers-are-forked.patch

@@ -0,0 +1,76 @@
+From e115a6edfaa07203c6d6d40eba9e4f097efe0cf2 Mon Sep 17 00:00:00 2001
+From: NeilBrown <neilb@suse.de>
+Date: Wed, 25 Oct 2023 12:40:24 -0400
+Subject: [PATCH] export: move cache_open() before workers are forked.
+
+If each worker has a separate open on a cache channel, then each worker
+will potentially receive every upcall request resulting in duplicated
+work.
+
+A worker will only not see a request that another worker sees if that
+other worker answers the request before this worker gets a chance to
+read it.
+
+To avoid duplicate effort between threads and so get maximum benefit
+from multiple threads, open the cache channels before forking.
+
+Note that the kernel provides locking so that only one thread can be
+reading to writing to any channel at any given moment.
+
+Fixes: 5fc3bac9e0c3 ("mountd: Ensure we don't share cache file descriptors among processes.")
+Signed-off-by: NeilBrown <neilb@suse.de>
+Signed-off-by: Steve Dickson <steved@redhat.com>
+---
+ utils/exportd/exportd.c | 8 ++++++--
+ utils/mountd/mountd.c   | 8 ++++++--
+ 2 files changed, 12 insertions(+), 4 deletions(-)
+
+diff --git a/utils/exportd/exportd.c b/utils/exportd/exportd.c
+index 2dd12cb..6f86644 100644
+--- a/utils/exportd/exportd.c
++++ b/utils/exportd/exportd.c
+@@ -289,12 +289,16 @@ main(int argc, char **argv)
+ 	else if (num_threads > MAX_THREADS)
+ 		num_threads = MAX_THREADS;
+ 
++	/* Open cache channel files BEFORE forking so each upcall is
++	 * only handled by one thread.  Kernel provides locking for both
++	 * read and write.
++	 */
++	cache_open();
++
+ 	if (num_threads > 1)
+ 		fork_workers();
+ 
+ 
+-	/* Open files now to avoid sharing descriptors among forked processes */
+-	cache_open();
+ 	v4clients_init();
+ 
+ 	/* Process incoming upcalls */
+diff --git a/utils/mountd/mountd.c b/utils/mountd/mountd.c
+index bcf749f..f9c62cd 100644
+--- a/utils/mountd/mountd.c
++++ b/utils/mountd/mountd.c
+@@ -916,12 +916,16 @@ main(int argc, char **argv)
+ 	else if (num_threads > MAX_THREADS)
+ 		num_threads = MAX_THREADS;
+ 
++	/* Open cache channel files BEFORE forking so each upcall is
++	 * only handled by one thread.  Kernel provides locking for both
++	 * read and write.
++	 */
++	cache_open();
++
+ 	if (num_threads > 1)
+ 		fork_workers();
+ 
+ 	nfsd_path_init();
+-	/* Open files now to avoid sharing descriptors among forked processes */
+-	cache_open();
+ 	v4clients_init();
+ 
+ 	xlog(L_NOTICE, "Version " VERSION " starting");
+-- 
+1.8.3.1
+

0010-gssd-fix-handling-DNS-lookup-failure.patch

@@ -0,0 +1,116 @@
+From 75b04a9bff709a49f55326b439851822dd630be6 Mon Sep 17 00:00:00 2001
+From: Olga Kornievskaia <kolga@netapp.com>
+Date: Mon, 16 Oct 2023 11:45:54 -0400
+Subject: [PATCH] gssd: fix handling DNS lookup failure
+
+When the kernel does its first ever lookup for a given server ip it
+sends down info for server, protocol, etc. On the gssd side as it
+scans the pipefs structure and sees a new entry it reads that info
+and creates a clp_info structure. At that time it also does
+a DNS lookup of the provided ip to name using getnameinfo(),
+this is saved in clp->servername for all other upcalls that is
+down under that directory.
+
+If this 1st getnameinfo() results in a failed resolution for
+whatever reason (a temporary DNS resolution problem), this cause
+of all other future upcalls to fail.
+
+As a fix, this patch proposed to (1) save the server info that's
+passed only in the initial pipefs new entry creation in the
+clp_info structure, then (2) for the upcalls, if clp->servername
+is NULL, then do the DNS lookup again and set all the needed
+clp_info fields upon successful resolution.
+
+Signed-off-by: Olga Kornievskaia <kolga@netapp.com>
+Signed-off-by: Steve Dickson <steved@redhat.com>
+---
+ utils/gssd/gssd.c | 41 +++++++++++++++++++++++++++++++++++++++++
+ utils/gssd/gssd.h |  6 ++++++
+ 2 files changed, 47 insertions(+)
+
+diff --git a/utils/gssd/gssd.c b/utils/gssd/gssd.c
+index 833d8e0..ca9b326 100644
+--- a/utils/gssd/gssd.c
++++ b/utils/gssd/gssd.c
+@@ -365,6 +365,12 @@ gssd_read_service_info(int dirfd, struct clnt_info *clp)
+ 
+ fail:
+ 	printerr(0, "ERROR: failed to parse %s/info\n", clp->relpath);
++	clp->upcall_address = strdup(address);
++	clp->upcall_port = strdup(port);
++	clp->upcall_program = program;
++	clp->upcall_vers = version;
++	clp->upcall_protoname = strdup(protoname);
++	clp->upcall_service = strdup(service);
+ 	free(servername);
+ 	free(protoname);
+ 	clp->servicename = NULL;
+@@ -408,6 +414,16 @@ gssd_free_client(struct clnt_info *clp)
+ 	free(clp->servicename);
+ 	free(clp->servername);
+ 	free(clp->protocol);
++	if (!clp->servername) {
++		if (clp->upcall_address)
++			free(clp->upcall_address);
++		if (clp->upcall_port)
++			free(clp->upcall_port);
++		if (clp->upcall_protoname)
++			free(clp->upcall_protoname);
++		if (clp->upcall_service)
++			free(clp->upcall_service);
++	}
+ 	free(clp);
+ }
+ 
+@@ -446,6 +462,31 @@ gssd_clnt_gssd_cb(int UNUSED(fd), short UNUSED(which), void *data)
+ {
+ 	struct clnt_info *clp = data;
+ 
++	/* if there was a failure to translate IP to name for this server,
++	 * try again
++	 */
++	if (!clp->servername) {
++	        if (!gssd_addrstr_to_sockaddr((struct sockaddr *)&clp->addr,
++                                 clp->upcall_address, clp->upcall_port ?
++				 clp->upcall_port : "")) {
++			goto do_upcall;
++		}
++		clp->servername = gssd_get_servername(clp->upcall_address,
++				(struct sockaddr *)&clp->addr, clp->upcall_address);
++		if (!clp->servername)
++			goto do_upcall;
++
++		if (asprintf(&clp->servicename, "%s@%s", clp->upcall_service,
++					clp->servername) < 0) {
++			free(clp->servername);
++			clp->servername = NULL;
++			goto do_upcall;
++		}
++		clp->prog = clp->upcall_program;
++		clp->vers = clp->upcall_vers;
++		clp->protocol = strdup(clp->upcall_protoname);
++	}
++do_upcall:
+ 	handle_gssd_upcall(clp);
+ }
+ 
+diff --git a/utils/gssd/gssd.h b/utils/gssd/gssd.h
+index 519dc43..4e070ed 100644
+--- a/utils/gssd/gssd.h
++++ b/utils/gssd/gssd.h
+@@ -86,6 +86,12 @@ struct clnt_info {
+ 	int			gssd_fd;
+ 	struct event		*gssd_ev;
+ 	struct			sockaddr_storage addr;
++	char			*upcall_address;
++	char			*upcall_port;
++	int			upcall_program;
++	int			upcall_vers;
++	char			*upcall_protoname;
++	char			*upcall_service;
+ };
+ 
+ struct clnt_upcall_info {
+-- 
+1.8.3.1
+

nfs-utils.spec

@@ -4,7 +4,7 @@
 
 Name:    nfs-utils
 Version: 2.6.2
-Release: 4
+Release: 5
 Epoch:   2
 Summary: The Linux NFS userland utility package
 License: MIT and GPLv2 and GPLv2+ and BSD
@@ -20,6 +20,9 @@ Patch4:  0004-nfs-blkmaped-Fix-the-error-status-when-nfs_blkmapd-s.patch
 Patch5:  0005-nfs-blkmapd-PID-file-read-by-systemd-failed.patch
 Patch6:  0006-nfs-utils-Don-t-allow-junction-tests-to-trigger-auto.patch
 Patch7:  0007-Covscan-Scan-Wrong-Check-of-Return-Value.patch
+Patch8:  0008-export-fix-handling-of-error-from-match_fsid.patch
+Patch9:  0009-export-move-cache_open-before-workers-are-forked.patch
+Patch10: 0010-gssd-fix-handling-DNS-lookup-failure.patch
 
 BuildRequires: libevent-devel,libcap-devel, libtirpc-devel libblkid-devel
 BuildRequires: krb5-libs >= 1.4 autoconf >= 2.57 openldap-devel >= 2.2
@@ -292,6 +295,9 @@ fi
 %{_mandir}/*/*
 
 %changelog
+* Tue Dec 19 2023 wuguanghao <wuguanghao3@huawei.com> - 2:2.6.2-5
+- backport bugfix patches from community
+
 * Wed Mar 22 2023 wuguanghao <wuguanghao3@huawei.com> - 2:2.6.2-4
 - backport patches from community