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authorArnd Bergmann <arnd@arndb.de>2019-10-31 17:53:13 +0300
committerJ. Bruce Fields <bfields@redhat.com>2019-12-20 01:46:08 +0300
commit9cc7680149b238223bbb8bcf3272f6bd47f1fbfb (patch)
treeef10cbb50010ca6cf0ab07332b95fe88391c07e3 /fs/nfsd
parente4598e38ee7e708d751081799f27d3f11a3e687d (diff)
downloadlinux-9cc7680149b238223bbb8bcf3272f6bd47f1fbfb.tar.xz
nfsd: make 'boot_time' 64-bit wide
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@arndb.de> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'fs/nfsd')
-rw-r--r--fs/nfsd/netns.h2
-rw-r--r--fs/nfsd/nfs4recover.c8
-rw-r--r--fs/nfsd/nfs4state.c14
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 2481e7662128..a8fb18609146 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;
@@ -1782,7 +1782,7 @@ 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;
@@ -1795,7 +1795,7 @@ 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 */
@@ -2004,7 +2004,7 @@ 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 27e1c12618b8..a178374bacd5 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -748,7 +748,7 @@ static int nfs4_init_cp_state(struct nfsd_net *nn, copy_stateid_t *stid,
{
int new_id;
- stid->stid.si_opaque.so_clid.cl_boot = nn->boot_time;
+ stid->stid.si_opaque.so_clid.cl_boot = (u32)nn->boot_time;
stid->stid.si_opaque.so_clid.cl_id = nn->s2s_cp_cl_id;
stid->sc_type = sc_type;
@@ -1911,7 +1911,7 @@ 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;
}
@@ -2271,7 +2271,7 @@ 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);
}
@@ -5233,9 +5233,9 @@ 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) ==
@@ -7792,7 +7792,7 @@ 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);