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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 <kolga@netapp.com>
Fixes: 1976b2b314 ("NFSv4.1 query for fs_location attr on a new file system")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Olga Kornievskaia 2022-03-16 18:24:26 -04:00 committed by Trond Myklebust
parent 693486d5f8
commit a43bf60444
3 changed files with 11 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
fs/nfs/client.c
View File

@ -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;

8
fs/nfs/fs_context.c
View File

@ -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;

1
include/linux/nfs_fs_sb.h
View File

@ -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 */