Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
nfsd: add a runtime switch for disabling delegated timestamps
The delegated timestamp code seems to be working well enough now that we
want to make it always be built in. In the event that there are problems
though, we still want to be able to disable them for debugging purposes.
Add a switch to debugfs to enable them at runtime.
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
authored by
Jeff Layton
and committed by
Chuck Lever
6237a17f
ed7f4d32
+13
+4
fs/nfsd/debugfs.c
+4
fs/nfsd/debugfs.c
+8
fs/nfsd/nfs4state.c
+8
fs/nfsd/nfs4state.c
···
76
76
77
77
static u64 current_sessionid = 1;
78
78
79
+
bool nfsd_delegts_enabled __read_mostly = true;
80
+
79
81
#define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t)))
80
82
#define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t)))
81
83
#define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t)))
···
6047
6045
}
6048
6046
6049
6047
#ifdef CONFIG_NFSD_V4_DELEG_TIMESTAMPS
6048
+
/*
6049
+
* Timestamp delegation was introduced in RFC7862. Runtime switch for disabling
6050
+
* this feature is /sys/kernel/debug/nfsd/delegated_timestamps.
6051
+
*/
6050
6052
static bool nfsd4_want_deleg_timestamps(const struct nfsd4_open *open)
6051
6053
{
6054
+
if (!nfsd_delegts_enabled)
6055
+
return false;
6052
6056
return open->op_deleg_want & OPEN4_SHARE_ACCESS_WANT_DELEG_TIMESTAMPS;
6053
6057
}
6054
6058
#else /* CONFIG_NFSD_V4_DELEG_TIMESTAMPS */