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NFS: Add mount options supporting eager writes

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Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Trond Myklebust 2021-02-12 16:49:49 -05:00 committed by Anna Schumaker
parent ed7bcdb374
commit a0492339fc
1 changed files with 33 additions and 0 deletions
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33
fs/nfs/fs_context.c
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@ -82,6 +82,7 @@ enum nfs_param {
Opt_v,
Opt_vers,
Opt_wsize,
Opt_write,
};
enum {
@ -113,6 +114,19 @@ static const struct constant_table nfs_param_enums_lookupcache[] = {
{}
};
enum {
Opt_write_lazy,
Opt_write_eager,
Opt_write_wait,
};
static const struct constant_table nfs_param_enums_write[] = {
{ "lazy", Opt_write_lazy },
{ "eager", Opt_write_eager },
{ "wait", Opt_write_wait },
{}
};
static const struct fs_parameter_spec nfs_fs_parameters[] = {
fsparam_flag_no("ac", Opt_ac),
fsparam_u32 ("acdirmax", Opt_acdirmax),
@ -171,6 +185,7 @@ static const struct fs_parameter_spec nfs_fs_parameters[] = {
fsparam_flag ("v4.1", Opt_v),
fsparam_flag ("v4.2", Opt_v),
fsparam_string("vers", Opt_vers),
fsparam_enum ("write", Opt_write, nfs_param_enums_write),
fsparam_u32 ("wsize", Opt_wsize),
{}
};
@ -770,6 +785,24 @@ static int nfs_fs_context_parse_param(struct fs_context *fc,
goto out_invalid_value;
}
break;
case Opt_write:
switch (result.uint_32) {
case Opt_write_lazy:
ctx->flags &=
~(NFS_MOUNT_WRITE_EAGER | NFS_MOUNT_WRITE_WAIT);
break;
case Opt_write_eager:
ctx->flags |= NFS_MOUNT_WRITE_EAGER;
ctx->flags &= ~NFS_MOUNT_WRITE_WAIT;
break;
case Opt_write_wait:
ctx->flags |=
NFS_MOUNT_WRITE_EAGER | NFS_MOUNT_WRITE_WAIT;
break;
default:
goto out_invalid_value;
}
break;
/*
* Special options