The local boot time variable gets truncated to time_t at the moment,
which can lead to slightly odd behavior on 32-bit architectures.
Use ktime_get_real_seconds() instead of get_seconds() to always
get a 64-bit result, and keep it that way wherever possible.
It still gets truncated in a few places:
- When assigning to cl_clientid.cl_boot, this is already documented
and is only used as a unique identifier.
- In clients_still_reclaiming(), the truncation is to 'unsigned long'
in order to use the 'time_before() helper.
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
---
fs/nfsd/netns.h | 2 +-
fs/nfsd/nfs4recover.c | 8 ++++----
fs/nfsd/nfs4state.c | 14 +++++++-------
3 files changed, 12 insertions(+), 12 deletions(-)
diff --git a/fs/nfsd/netns.h b/fs/nfsd/netns.h
index 9a4ef815fb8c..29bbe28eda53 100644
--- a/fs/nfsd/netns.h
+++ b/fs/nfsd/netns.h
@@ -40,7 +40,7 @@ struct nfsd_net {
struct lock_manager nfsd4_manager;
bool grace_ended;
- time_t boot_time;
+ time64_t boot_time;
/* internal mount of the "nfsd" pseudofilesystem: */
struct vfsmount *nfsd_mnt;
diff --git a/fs/nfsd/nfs4recover.c b/fs/nfsd/nfs4recover.c
index cdc75ad4438b..d51334f38e3b 100644
--- a/fs/nfsd/nfs4recover.c
+++ b/fs/nfsd/nfs4recover.c
@@ -1445,7 +1445,7 @@ nfsd4_cld_grace_done_v0(struct nfsd_net *nn)
}
cup->cu_u.cu_msg.cm_cmd = Cld_GraceDone;
- cup->cu_u.cu_msg.cm_u.cm_gracetime = (int64_t)nn->boot_time;
+ cup->cu_u.cu_msg.cm_u.cm_gracetime = nn->boot_time;
ret = cld_pipe_upcall(cn->cn_pipe, &cup->cu_u.cu_msg);
if (!ret)
ret = cup->cu_u.cu_msg.cm_status;
@@ -1780,7 +1780,7 @@ nfsd4_cltrack_client_has_session(struct nfs4_client *clp)
}
static char *
-nfsd4_cltrack_grace_start(time_t grace_start)
+nfsd4_cltrack_grace_start(time64_t grace_start)
{
int copied;
size_t len;
@@ -1793,7 +1793,7 @@ nfsd4_cltrack_grace_start(time_t grace_start)
if (!result)
return result;
- copied = snprintf(result, len, GRACE_START_ENV_PREFIX "%ld",
+ copied = snprintf(result, len, GRACE_START_ENV_PREFIX "%lld",
grace_start);
if (copied >= len) {
/* just return nothing if output was truncated */
@@ -2007,7 +2007,7 @@ nfsd4_umh_cltrack_grace_done(struct nfsd_net *nn)
char *legacy;
char timestr[22]; /* FIXME: better way to determine max size? */
- sprintf(timestr, "%ld", nn->boot_time);
+ sprintf(timestr, "%lld", nn->boot_time);
legacy = nfsd4_cltrack_legacy_topdir();
nfsd4_umh_cltrack_upcall("gracedone", timestr, legacy, NULL);
kfree(legacy);
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 2333924d7c6b..70a953b03be4 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -753,7 +753,7 @@ int nfs4_init_cp_state(struct nfsd_net *nn, struct nfsd4_copy *copy)
if (new_id < 0)
return 0;
copy->cp_stateid.si_opaque.so_id = new_id;
- copy->cp_stateid.si_opaque.so_clid.cl_boot = nn->boot_time;
+ copy->cp_stateid.si_opaque.so_clid.cl_boot = (u32)nn->boot_time;
copy->cp_stateid.si_opaque.so_clid.cl_id = nn->s2s_cp_cl_id;
return 1;
}
@@ -1862,7 +1862,7 @@ STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn)
*/
if (clid->cl_boot == (u32)nn->boot_time)
return 0;
- dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
+ dprintk("NFSD stale clientid (%08x/%08x) boot_time %08llx\n",
clid->cl_boot, clid->cl_id, nn->boot_time);
return 1;
}
@@ -2222,7 +2222,7 @@ static void gen_confirm(struct nfs4_client *clp, struct nfsd_net *nn)
static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn)
{
- clp->cl_clientid.cl_boot = nn->boot_time;
+ clp->cl_clientid.cl_boot = (u32)nn->boot_time;
clp->cl_clientid.cl_id = nn->clientid_counter++;
gen_confirm(clp, nn);
}
@@ -5178,9 +5178,9 @@ nfsd4_end_grace(struct nfsd_net *nn)
*/
static bool clients_still_reclaiming(struct nfsd_net *nn)
{
- unsigned long now = get_seconds();
- unsigned long double_grace_period_end = nn->boot_time +
- 2 * nn->nfsd4_lease;
+ unsigned long now = (unsigned long) ktime_get_real_seconds();
+ unsigned long double_grace_period_end = (unsigned long)nn->boot_time +
+ 2 * (unsigned long)nn->nfsd4_lease;
if (nn->track_reclaim_completes &&
atomic_read(&nn->nr_reclaim_complete) ==
@@ -7635,7 +7635,7 @@ static int nfs4_state_create_net(struct net *net)
INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]);
nn->conf_name_tree = RB_ROOT;
nn->unconf_name_tree = RB_ROOT;
- nn->boot_time = get_seconds();
+ nn->boot_time = ktime_get_real_seconds();
nn->grace_ended = false;
nn->nfsd4_manager.block_opens = true;
INIT_LIST_HEAD(&nn->nfsd4_manager.list);
--
2.20.0
