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Diffstat (limited to 'fs/nfs/fs_context.c')
-rw-r--r--fs/nfs/fs_context.c35
1 files changed, 35 insertions, 0 deletions
diff --git a/fs/nfs/fs_context.c b/fs/nfs/fs_context.c
index 06894bcdea2d..971a9251c1d9 100644
--- a/fs/nfs/fs_context.c
+++ b/fs/nfs/fs_context.c
@@ -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
@@ -1479,6 +1512,8 @@ static int nfs_init_fs_context(struct fs_context *fc)
ctx->selected_flavor = RPC_AUTH_MAXFLAVOR;
ctx->minorversion = 0;
ctx->need_mount = true;
+
+ fc->s_iflags |= SB_I_STABLE_WRITES;
}
fc->fs_private = ctx;
fc->ops = &nfs_fs_context_ops;