diff options
| -rw-r--r-- | sys/fs/nfsserver/nfs_nfsdserv.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/sys/fs/nfsserver/nfs_nfsdserv.c b/sys/fs/nfsserver/nfs_nfsdserv.c index 85fbbd2..307b1f6 100644 --- a/sys/fs/nfsserver/nfs_nfsdserv.c +++ b/sys/fs/nfsserver/nfs_nfsdserv.c @@ -55,6 +55,11 @@ extern int nfs_rootfhset; extern int nfsrv_enable_crossmntpt; #endif /* !APPLEKEXT */ +static int nfs_async = 0; +SYSCTL_DECL(_vfs_nfsd); +SYSCTL_INT(_vfs_nfsd, OID_AUTO, async, CTLFLAG_RW, &nfs_async, 0, + "Tell client that writes were synced even though they were not"); + /* * This list defines the GSS mechanisms supported. * (Don't ask me how you get these strings from the RFC stuff like @@ -912,7 +917,13 @@ nfsrvd_write(struct nfsrv_descript *nd, __unused int isdgram, goto out; NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED); *tl++ = txdr_unsigned(retlen); - if (stable == NFSWRITE_UNSTABLE) + /* + * If nfs_async is set, then pretend the write was FILESYNC. + * Warning: Doing this violates RFC1813 and runs a risk + * of data written by a client being lost when the server + * crashes/reboots. + */ + if (stable == NFSWRITE_UNSTABLE && nfs_async == 0) *tl++ = txdr_unsigned(stable); else *tl++ = txdr_unsigned(NFSWRITE_FILESYNC); |
