2022-05-05 14:53:12 +03:00
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Olga Kornievskaia <kolga@netapp.com>
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Date: Wed, 16 Mar 2022 18:24:26 -0400
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Subject: [PATCH] NFSv4.1 provide mount option to toggle trunking discovery
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Introduce a new mount option -- trunkdiscovery,notrunkdiscovery -- to
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toggle whether or not the client will engage in actively discovery
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of trunking locations.
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v2 make notrunkdiscovery default
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Signed-off-by: Olga Kornievskaia <kolga@netapp.com>
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Fixes: 1976b2b31462 ("NFSv4.1 query for fs_location attr on a new file system")
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Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
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(cherry picked from commit a43bf604446414103b7535f38e739b65601c4fb2)
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Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
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---
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fs/nfs/client.c | 3 ++-
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fs/nfs/fs_context.c | 8 ++++++++
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include/linux/nfs_fs_sb.h | 1 +
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3 files changed, 11 insertions(+), 1 deletion(-)
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diff --git a/fs/nfs/client.c b/fs/nfs/client.c
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index 090b16890e3d..f303e96ce165 100644
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--- a/fs/nfs/client.c
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+++ b/fs/nfs/client.c
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@@ -861,7 +861,8 @@ int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs
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}
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if (clp->rpc_ops->discover_trunking != NULL &&
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- (server->caps & NFS_CAP_FS_LOCATIONS)) {
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+ (server->caps & NFS_CAP_FS_LOCATIONS &&
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+ (server->flags & NFS_MOUNT_TRUNK_DISCOVERY))) {
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error = clp->rpc_ops->discover_trunking(server, mntfh);
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if (error < 0)
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return error;
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diff --git a/fs/nfs/fs_context.c b/fs/nfs/fs_context.c
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2022-08-26 17:53:06 +03:00
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index fb3cad38b149..0166370f088e 100644
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2022-05-05 14:53:12 +03:00
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--- a/fs/nfs/fs_context.c
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+++ b/fs/nfs/fs_context.c
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@@ -79,6 +79,7 @@ enum nfs_param {
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Opt_source,
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Opt_tcp,
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Opt_timeo,
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+ Opt_trunkdiscovery,
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Opt_udp,
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Opt_v,
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Opt_vers,
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@@ -179,6 +180,7 @@ static const struct fs_parameter_spec nfs_fs_parameters[] = {
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fsparam_string("source", Opt_source),
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fsparam_flag ("tcp", Opt_tcp),
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fsparam_u32 ("timeo", Opt_timeo),
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+ fsparam_flag_no("trunkdiscovery", Opt_trunkdiscovery),
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fsparam_flag ("udp", Opt_udp),
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fsparam_flag ("v2", Opt_v),
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fsparam_flag ("v3", Opt_v),
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@@ -528,6 +530,12 @@ static int nfs_fs_context_parse_param(struct fs_context *fc,
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else
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ctx->flags &= ~NFS_MOUNT_NOCTO;
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break;
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+ case Opt_trunkdiscovery:
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+ if (result.negated)
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+ ctx->flags &= ~NFS_MOUNT_TRUNK_DISCOVERY;
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+ else
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+ ctx->flags |= NFS_MOUNT_TRUNK_DISCOVERY;
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+ break;
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case Opt_ac:
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if (result.negated)
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ctx->flags |= NFS_MOUNT_NOAC;
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diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h
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2022-08-26 17:53:06 +03:00
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index da9ef0ab9b4b..5336e494703b 100644
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2022-05-05 14:53:12 +03:00
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--- a/include/linux/nfs_fs_sb.h
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+++ b/include/linux/nfs_fs_sb.h
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@@ -156,6 +156,7 @@ struct nfs_server {
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#define NFS_MOUNT_SOFTREVAL 0x800000
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#define NFS_MOUNT_WRITE_EAGER 0x01000000
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#define NFS_MOUNT_WRITE_WAIT 0x02000000
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+#define NFS_MOUNT_TRUNK_DISCOVERY 0x04000000
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unsigned int fattr_valid; /* Valid attributes */
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unsigned int caps; /* server capabilities */
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