Commit a0492339 authored by Trond Myklebust's avatar Trond Myklebust Committed by Anna Schumaker
Browse files

NFS: Add mount options supporting eager writes 



Signed-off-by: default avatarTrond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: default avatarAnna Schumaker <Anna.Schumaker@Netapp.com>
parent ed7bcdb3

fs/nfs/fs_context.c

+33 −0
Original line number Diff line number Diff line
@@ -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