From 68ae3e7b9b621603d53fc5ce49e640b1df254a12 Mon Sep 17 00:00:00 2001 From: Olga Kornievskaia Date: Wed, 16 Mar 2022 18:24:26 -0400 Subject: [PATCH 8/9] NFSv4.1 provide mount option to toggle trunking discovery Introduce a new mount option -- trunkdiscovery,notrunkdiscovery -- to toggle whether or not the client will engage in actively discovery of trunking locations. v2 make notrunkdiscovery default Signed-off-by: Olga Kornievskaia Cherry-picked-for: https://bugs.archlinux.org/task/74272 --- fs/nfs/client.c | 3 ++- fs/nfs/fs_context.c | 8 ++++++++ include/linux/nfs_fs_sb.h | 1 + 3 files changed, 11 insertions(+), 1 deletion(-) diff --git a/fs/nfs/client.c b/fs/nfs/client.c index d1f34229e11a..e828504cc396 100644 --- a/fs/nfs/client.c +++ b/fs/nfs/client.c @@ -857,7 +857,8 @@ static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, str } if (clp->rpc_ops->discover_trunking != NULL && - (server->caps & NFS_CAP_FS_LOCATIONS)) { + (server->caps & NFS_CAP_FS_LOCATIONS && + (server->flags & NFS_MOUNT_TRUNK_DISCOVERY))) { error = clp->rpc_ops->discover_trunking(server, mntfh); if (error < 0) return error; diff --git a/fs/nfs/fs_context.c b/fs/nfs/fs_context.c index ea17fa1f31ec..e2d59bb5e6bb 100644 --- a/fs/nfs/fs_context.c +++ b/fs/nfs/fs_context.c @@ -80,6 +80,7 @@ enum nfs_param { Opt_source, Opt_tcp, Opt_timeo, + Opt_trunkdiscovery, Opt_udp, Opt_v, Opt_vers, @@ -180,6 +181,7 @@ static const struct fs_parameter_spec nfs_fs_parameters[] = { fsparam_string("source", Opt_source), fsparam_flag ("tcp", Opt_tcp), fsparam_u32 ("timeo", Opt_timeo), + fsparam_flag_no("trunkdiscovery", Opt_trunkdiscovery), fsparam_flag ("udp", Opt_udp), fsparam_flag ("v2", Opt_v), fsparam_flag ("v3", Opt_v), @@ -529,6 +531,12 @@ static int nfs_fs_context_parse_param(struct fs_context *fc, else ctx->flags &= ~NFS_MOUNT_NOCTO; break; + case Opt_trunkdiscovery: + if (result.negated) + ctx->flags &= ~NFS_MOUNT_TRUNK_DISCOVERY; + else + ctx->flags |= NFS_MOUNT_TRUNK_DISCOVERY; + break; case Opt_ac: if (result.negated) ctx->flags |= NFS_MOUNT_NOAC; diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h index ca0959e51e81..b0e3fd550122 100644 --- a/include/linux/nfs_fs_sb.h +++ b/include/linux/nfs_fs_sb.h @@ -151,6 +151,7 @@ struct nfs_server { #define NFS_MOUNT_SOFTREVAL 0x800000 #define NFS_MOUNT_WRITE_EAGER 0x01000000 #define NFS_MOUNT_WRITE_WAIT 0x02000000 +#define NFS_MOUNT_TRUNK_DISCOVERY 0x04000000 unsigned int fattr_valid; /* Valid attributes */ unsigned int caps; /* server capabilities */ -- 2.36.0