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| author | Olga Kornievskaia <kolga@netapp.com> | 2021-08-27 14:37:17 -0400 |
|---|---|---|
| committer | Anna Schumaker <Anna.Schumaker@Netapp.com> | 2021-08-27 16:37:17 -0400 |
| commit | 7e134205f62955369619021a695cd78fefd32451 (patch) | |
| tree | fedcba5947fb2b06771bf816a42c71971e770f26 /fs/nfs/fs_context.c | |
| parent | df205d0a8ea1b873a29f1333f232f884e9728acc (diff) | |
| download | lwn-7e134205f62955369619021a695cd78fefd32451.tar.gz lwn-7e134205f62955369619021a695cd78fefd32451.zip | |
NFSv4 introduce max_connect mount options
This option will control up to how many xprts can the client
establish to the server with a distinct address (that means
nconnect connections are not counted towards this new limit).
This patch is setting up nfs structures to keeep track of the
max_connect limit (does not enforce it).
The default value is kept at 1 so that no current mounts that
don't want any additional connections would be effected. The
maximum value is set at 16.
Mounts to DS are not limited to default value of 1 but instead
set to the maximum default value of 16 (NFS_MAX_TRANSPORTS).
Signed-off-by: Olga Kornievskaia <kolga@netapp.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'fs/nfs/fs_context.c')
| -rw-r--r-- | fs/nfs/fs_context.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/nfs/fs_context.c b/fs/nfs/fs_context.c index d95c9a39bc70..0d444a90f513 100644 --- a/fs/nfs/fs_context.c +++ b/fs/nfs/fs_context.c @@ -60,6 +60,7 @@ enum nfs_param { Opt_mountvers, Opt_namelen, Opt_nconnect, + Opt_max_connect, Opt_port, Opt_posix, Opt_proto, @@ -158,6 +159,7 @@ static const struct fs_parameter_spec nfs_fs_parameters[] = { fsparam_u32 ("mountvers", Opt_mountvers), fsparam_u32 ("namlen", Opt_namelen), fsparam_u32 ("nconnect", Opt_nconnect), + fsparam_u32 ("max_connect", Opt_max_connect), fsparam_string("nfsvers", Opt_vers), fsparam_u32 ("port", Opt_port), fsparam_flag_no("posix", Opt_posix), @@ -770,6 +772,11 @@ static int nfs_fs_context_parse_param(struct fs_context *fc, goto out_of_bounds; ctx->nfs_server.nconnect = result.uint_32; break; + case Opt_max_connect: + if (result.uint_32 < 1 || result.uint_32 > NFS_MAX_TRANSPORTS) + goto out_of_bounds; + ctx->nfs_server.max_connect = result.uint_32; + break; case Opt_lookupcache: switch (result.uint_32) { case Opt_lookupcache_all: |