[PATCH 00/19] nfs, nfsd: avoid 32-bit time_t

[PATCH 00/19] nfs, nfsd: avoid 32-bit time_t

[Arnd Bergmann]

I have finally found the time to convert all of NFS away from
using time_t derived data structures to (mostly) time64_t,
unifying the behavior between 32-bit and 64-bit architectures
and paving the way to removing the old time_t definition from
the kernel.

Please review and test. This may be a little late for linux-5.5,
but I hope to get it all into linux-5.6 once all review comments
are addressed.

     Arnd

Arnd Bergmann (19):
  sunrpc: convert to time64_t for expiry
  nfs: use time64_t internally
  nfs: use timespec64 in nfs_fattr
  nfs: callback: use timespec64 in cb_getattrres
  nfs: fscache: use timespec64 in inode auxdata
  nfs: remove timespec from xdr_encode_nfstime
  nfs: encode nfsv4 timestamps as 64-bit
  nfsd: use ktime_get_seconds() for timestamps
  nfsd: print 64-bit timestamps in client_info_show
  nfsd: handle nfs3 timestamps as unsigned
  nfsd: use timespec64 in encode_time_delta
  nfsd: make 'boot_time' 64-bit wide
  nfsd: pass a 64-bit guardtime to nfsd_setattr()
  nfsd: use time64_t in nfsd_proc_setattr() check
  nfsd: fix delay timer on 32-bit architectures
  nfsd: fix jiffies/time_t mixup in LRU list
  nfsd: use boottime for lease expiry alculation
  nfsd: use ktime_get_real_seconds() in nfs4_verifier
  nfsd: remove nfs4_reset_lease() declarations

 fs/nfs/callback.h                     |  4 +-
 fs/nfs/callback_proc.c                |  4 +-
 fs/nfs/callback_xdr.c                 |  6 +--
 fs/nfs/fscache-index.c                |  6 ++-
 fs/nfs/fscache.c                      | 18 ++++---
 fs/nfs/fscache.h                      |  8 ++--
 fs/nfs/inode.c                        | 54 ++++++++++-----------
 fs/nfs/internal.h                     |  6 +--
 fs/nfs/nfs2xdr.c                      | 33 ++++++-------
 fs/nfs/nfs3xdr.c                      | 14 ++----
 fs/nfs/nfs4xdr.c                      | 35 +++++++-------
 fs/nfsd/netns.h                       |  6 +--
 fs/nfsd/nfs3xdr.c                     | 20 ++++----
 fs/nfsd/nfs4callback.c                |  7 ++-
 fs/nfsd/nfs4layouts.c                 |  2 +-
 fs/nfsd/nfs4proc.c                    |  2 +-
 fs/nfsd/nfs4recover.c                 |  8 ++--
 fs/nfsd/nfs4state.c                   | 68 +++++++++++++--------------
 fs/nfsd/nfs4xdr.c                     |  4 +-
 fs/nfsd/nfsctl.c                      |  6 +--
 fs/nfsd/nfsd.h                        |  2 -
 fs/nfsd/nfsfh.h                       |  4 +-
 fs/nfsd/nfsproc.c                     |  6 +--
 fs/nfsd/state.h                       | 10 ++--
 fs/nfsd/vfs.c                         |  4 +-
 fs/nfsd/vfs.h                         |  2 +-
 fs/nfsd/xdr3.h                        |  2 +-
 include/linux/nfs_fs_sb.h             |  2 +-
 include/linux/nfs_xdr.h               | 14 +++---
 include/linux/sunrpc/cache.h          | 42 +++++++++--------
 include/linux/sunrpc/gss_api.h        |  4 +-
 include/linux/sunrpc/gss_krb5.h       |  2 +-
 net/sunrpc/auth_gss/gss_krb5_mech.c   | 12 +++--
 net/sunrpc/auth_gss/gss_krb5_seal.c   |  8 ++--
 net/sunrpc/auth_gss/gss_krb5_unseal.c |  6 +--
 net/sunrpc/auth_gss/gss_krb5_wrap.c   | 16 +++----
 net/sunrpc/auth_gss/gss_mech_switch.c |  2 +-
 net/sunrpc/auth_gss/svcauth_gss.c     |  6 +--
 net/sunrpc/cache.c                    | 18 +++----
 net/sunrpc/svcauth_unix.c             | 10 ++--
 40 files changed, 243 insertions(+), 240 deletions(-)

-- 
2.20.0

[PATCH 01/19] sunrpc: convert to time64_t for expiry

[Arnd Bergmann]

Using signed 32-bit types for UTC time leads to the y2038 overflow,
which is what happens in the sunrpc code at the moment.

This changes the sunrpc code over to use time64_t where possible.
The one exception is the gss_import_v{1,2}_context() function for
kerberos5, which uses 32-bit timestamps in the protocol. Here,
we can at least treat the numbers as 'unsigned', which extends the
range from 2038 to 2106.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 include/linux/sunrpc/gss_api.h        |  4 ++--
 include/linux/sunrpc/gss_krb5.h       |  2 +-
 net/sunrpc/auth_gss/gss_krb5_mech.c   | 12 +++++++++---
 net/sunrpc/auth_gss/gss_krb5_seal.c   |  8 ++++----
 net/sunrpc/auth_gss/gss_krb5_unseal.c |  6 +++---
 net/sunrpc/auth_gss/gss_krb5_wrap.c   | 16 ++++++++--------
 net/sunrpc/auth_gss/gss_mech_switch.c |  2 +-
 net/sunrpc/auth_gss/svcauth_gss.c     |  4 ++--
 8 files changed, 30 insertions(+), 24 deletions(-)

diff --git a/include/linux/sunrpc/gss_api.h b/include/linux/sunrpc/gss_api.h
index 5ac5db4d295f..68c871924ebf 100644
--- a/include/linux/sunrpc/gss_api.h
+++ b/include/linux/sunrpc/gss_api.h
@@ -49,7 +49,7 @@ int gss_import_sec_context(
 		size_t			bufsize,
 		struct gss_api_mech	*mech,
 		struct gss_ctx		**ctx_id,
-		time_t			*endtime,
+		time64_t		*endtime,
 		gfp_t			gfp_mask);
 u32 gss_get_mic(
 		struct gss_ctx		*ctx_id,
@@ -109,7 +109,7 @@ struct gss_api_ops {
 			const void		*input_token,
 			size_t			bufsize,
 			struct gss_ctx		*ctx_id,
-			time_t			*endtime,
+			time64_t		*endtime,
 			gfp_t			gfp_mask);
 	u32 (*gss_get_mic)(
 			struct gss_ctx		*ctx_id,
diff --git a/include/linux/sunrpc/gss_krb5.h b/include/linux/sunrpc/gss_krb5.h
index 02c0412e368c..c1d77dd8ed41 100644
--- a/include/linux/sunrpc/gss_krb5.h
+++ b/include/linux/sunrpc/gss_krb5.h
@@ -106,9 +106,9 @@ struct krb5_ctx {
 	struct crypto_sync_skcipher *initiator_enc_aux;
 	u8			Ksess[GSS_KRB5_MAX_KEYLEN]; /* session key */
 	u8			cksum[GSS_KRB5_MAX_KEYLEN];
-	s32			endtime;
 	atomic_t		seq_send;
 	atomic64_t		seq_send64;
+	time64_t		endtime;
 	struct xdr_netobj	mech_used;
 	u8			initiator_sign[GSS_KRB5_MAX_KEYLEN];
 	u8			acceptor_sign[GSS_KRB5_MAX_KEYLEN];
diff --git a/net/sunrpc/auth_gss/gss_krb5_mech.c b/net/sunrpc/auth_gss/gss_krb5_mech.c
index 6e5d6d240215..75b3c2e9e8f8 100644
--- a/net/sunrpc/auth_gss/gss_krb5_mech.c
+++ b/net/sunrpc/auth_gss/gss_krb5_mech.c
@@ -253,6 +253,7 @@ gss_import_v1_context(const void *p, const void *end, struct krb5_ctx *ctx)
 {
 	u32 seq_send;
 	int tmp;
+	u32 time32;
 
 	p = simple_get_bytes(p, end, &ctx->initiate, sizeof(ctx->initiate));
 	if (IS_ERR(p))
@@ -290,9 +291,11 @@ gss_import_v1_context(const void *p, const void *end, struct krb5_ctx *ctx)
 		p = ERR_PTR(-ENOSYS);
 		goto out_err;
 	}
-	p = simple_get_bytes(p, end, &ctx->endtime, sizeof(ctx->endtime));
+	p = simple_get_bytes(p, end, &time32, sizeof(time32));
 	if (IS_ERR(p))
 		goto out_err;
+	/* unsigned 32-bit time overflows in year 2106 */
+	ctx->endtime = (time64_t)time32;
 	p = simple_get_bytes(p, end, &seq_send, sizeof(seq_send));
 	if (IS_ERR(p))
 		goto out_err;
@@ -587,15 +590,18 @@ gss_import_v2_context(const void *p, const void *end, struct krb5_ctx *ctx,
 {
 	u64 seq_send64;
 	int keylen;
+	u32 time32;
 
 	p = simple_get_bytes(p, end, &ctx->flags, sizeof(ctx->flags));
 	if (IS_ERR(p))
 		goto out_err;
 	ctx->initiate = ctx->flags & KRB5_CTX_FLAG_INITIATOR;
 
-	p = simple_get_bytes(p, end, &ctx->endtime, sizeof(ctx->endtime));
+	p = simple_get_bytes(p, end, &time32, sizeof(time32));
 	if (IS_ERR(p))
 		goto out_err;
+	/* unsigned 32-bit time overflows in year 2106 */
+	ctx->endtime = (time64_t)time32;
 	p = simple_get_bytes(p, end, &seq_send64, sizeof(seq_send64));
 	if (IS_ERR(p))
 		goto out_err;
@@ -659,7 +665,7 @@ gss_import_v2_context(const void *p, const void *end, struct krb5_ctx *ctx,
 static int
 gss_import_sec_context_kerberos(const void *p, size_t len,
 				struct gss_ctx *ctx_id,
-				time_t *endtime,
+				time64_t *endtime,
 				gfp_t gfp_mask)
 {
 	const void *end = (const void *)((const char *)p + len);
diff --git a/net/sunrpc/auth_gss/gss_krb5_seal.c b/net/sunrpc/auth_gss/gss_krb5_seal.c
index 48fe4a591b54..f1d280accf43 100644
--- a/net/sunrpc/auth_gss/gss_krb5_seal.c
+++ b/net/sunrpc/auth_gss/gss_krb5_seal.c
@@ -131,14 +131,14 @@ gss_get_mic_v1(struct krb5_ctx *ctx, struct xdr_buf *text,
 	struct xdr_netobj	md5cksum = {.len = sizeof(cksumdata),
 					    .data = cksumdata};
 	void			*ptr;
-	s32			now;
+	time64_t		now;
 	u32			seq_send;
 	u8			*cksumkey;
 
 	dprintk("RPC:       %s\n", __func__);
 	BUG_ON(ctx == NULL);
 
-	now = get_seconds();
+	now = ktime_get_real_seconds();
 
 	ptr = setup_token(ctx, token);
 
@@ -170,7 +170,7 @@ gss_get_mic_v2(struct krb5_ctx *ctx, struct xdr_buf *text,
 	struct xdr_netobj cksumobj = { .len = sizeof(cksumdata),
 				       .data = cksumdata};
 	void *krb5_hdr;
-	s32 now;
+	time64_t now;
 	u8 *cksumkey;
 	unsigned int cksum_usage;
 	__be64 seq_send_be64;
@@ -198,7 +198,7 @@ gss_get_mic_v2(struct krb5_ctx *ctx, struct xdr_buf *text,
 
 	memcpy(krb5_hdr + GSS_KRB5_TOK_HDR_LEN, cksumobj.data, cksumobj.len);
 
-	now = get_seconds();
+	now = ktime_get_real_seconds();
 
 	return (ctx->endtime < now) ? GSS_S_CONTEXT_EXPIRED : GSS_S_COMPLETE;
 }
diff --git a/net/sunrpc/auth_gss/gss_krb5_unseal.c b/net/sunrpc/auth_gss/gss_krb5_unseal.c
index ef2b25b86d2f..aaab91cf24c8 100644
--- a/net/sunrpc/auth_gss/gss_krb5_unseal.c
+++ b/net/sunrpc/auth_gss/gss_krb5_unseal.c
@@ -124,7 +124,7 @@ gss_verify_mic_v1(struct krb5_ctx *ctx,
 
 	/* it got through unscathed.  Make sure the context is unexpired */
 
-	now = get_seconds();
+	now = ktime_get_real_seconds();
 
 	if (now > ctx->endtime)
 		return GSS_S_CONTEXT_EXPIRED;
@@ -149,7 +149,7 @@ gss_verify_mic_v2(struct krb5_ctx *ctx,
 	char cksumdata[GSS_KRB5_MAX_CKSUM_LEN];
 	struct xdr_netobj cksumobj = {.len = sizeof(cksumdata),
 				      .data = cksumdata};
-	s32 now;
+	time64_t now;
 	u8 *ptr = read_token->data;
 	u8 *cksumkey;
 	u8 flags;
@@ -194,7 +194,7 @@ gss_verify_mic_v2(struct krb5_ctx *ctx,
 		return GSS_S_BAD_SIG;
 
 	/* it got through unscathed.  Make sure the context is unexpired */
-	now = get_seconds();
+	now = ktime_get_real_seconds();
 	if (now > ctx->endtime)
 		return GSS_S_CONTEXT_EXPIRED;
 
diff --git a/net/sunrpc/auth_gss/gss_krb5_wrap.c b/net/sunrpc/auth_gss/gss_krb5_wrap.c
index 14a0aff0cd84..6c1920eed771 100644
--- a/net/sunrpc/auth_gss/gss_krb5_wrap.c
+++ b/net/sunrpc/auth_gss/gss_krb5_wrap.c
@@ -163,7 +163,7 @@ gss_wrap_kerberos_v1(struct krb5_ctx *kctx, int offset,
 					    .data = cksumdata};
 	int			blocksize = 0, plainlen;
 	unsigned char		*ptr, *msg_start;
-	s32			now;
+	time64_t		now;
 	int			headlen;
 	struct page		**tmp_pages;
 	u32			seq_send;
@@ -172,7 +172,7 @@ gss_wrap_kerberos_v1(struct krb5_ctx *kctx, int offset,
 
 	dprintk("RPC:       %s\n", __func__);
 
-	now = get_seconds();
+	now = ktime_get_real_seconds();
 
 	blocksize = crypto_sync_skcipher_blocksize(kctx->enc);
 	gss_krb5_add_padding(buf, offset, blocksize);
@@ -268,7 +268,7 @@ gss_unwrap_kerberos_v1(struct krb5_ctx *kctx, int offset, struct xdr_buf *buf)
 	char			cksumdata[GSS_KRB5_MAX_CKSUM_LEN];
 	struct xdr_netobj	md5cksum = {.len = sizeof(cksumdata),
 					    .data = cksumdata};
-	s32			now;
+	time64_t		now;
 	int			direction;
 	s32			seqnum;
 	unsigned char		*ptr;
@@ -359,7 +359,7 @@ gss_unwrap_kerberos_v1(struct krb5_ctx *kctx, int offset, struct xdr_buf *buf)
 
 	/* it got through unscathed.  Make sure the context is unexpired */
 
-	now = get_seconds();
+	now = ktime_get_real_seconds();
 
 	if (now > kctx->endtime)
 		return GSS_S_CONTEXT_EXPIRED;
@@ -439,7 +439,7 @@ gss_wrap_kerberos_v2(struct krb5_ctx *kctx, u32 offset,
 		     struct xdr_buf *buf, struct page **pages)
 {
 	u8		*ptr, *plainhdr;
-	s32		now;
+	time64_t	now;
 	u8		flags = 0x00;
 	__be16		*be16ptr;
 	__be64		*be64ptr;
@@ -481,14 +481,14 @@ gss_wrap_kerberos_v2(struct krb5_ctx *kctx, u32 offset,
 	if (err)
 		return err;
 
-	now = get_seconds();
+	now = ktime_get_real_seconds();
 	return (kctx->endtime < now) ? GSS_S_CONTEXT_EXPIRED : GSS_S_COMPLETE;
 }
 
 static u32
 gss_unwrap_kerberos_v2(struct krb5_ctx *kctx, int offset, struct xdr_buf *buf)
 {
-	s32		now;
+	time64_t	now;
 	u8		*ptr;
 	u8		flags = 0x00;
 	u16		ec, rrc;
@@ -557,7 +557,7 @@ gss_unwrap_kerberos_v2(struct krb5_ctx *kctx, int offset, struct xdr_buf *buf)
 	/* do sequencing checks */
 
 	/* it got through unscathed.  Make sure the context is unexpired */
-	now = get_seconds();
+	now = ktime_get_real_seconds();
 	if (now > kctx->endtime)
 		return GSS_S_CONTEXT_EXPIRED;
 
diff --git a/net/sunrpc/auth_gss/gss_mech_switch.c b/net/sunrpc/auth_gss/gss_mech_switch.c
index 82060099a429..94fddce7f224 100644
--- a/net/sunrpc/auth_gss/gss_mech_switch.c
+++ b/net/sunrpc/auth_gss/gss_mech_switch.c
@@ -374,7 +374,7 @@ int
 gss_import_sec_context(const void *input_token, size_t bufsize,
 		       struct gss_api_mech	*mech,
 		       struct gss_ctx		**ctx_id,
-		       time_t			*endtime,
+		       time64_t			*endtime,
 		       gfp_t gfp_mask)
 {
 	if (!(*ctx_id = kzalloc(sizeof(**ctx_id), gfp_mask)))
diff --git a/net/sunrpc/auth_gss/svcauth_gss.c b/net/sunrpc/auth_gss/svcauth_gss.c
index 8be2f209982b..30ed5585a42a 100644
--- a/net/sunrpc/auth_gss/svcauth_gss.c
+++ b/net/sunrpc/auth_gss/svcauth_gss.c
@@ -433,7 +433,7 @@ static int rsc_parse(struct cache_detail *cd,
 	int id;
 	int len, rv;
 	struct rsc rsci, *rscp = NULL;
-	time_t expiry;
+	time64_t expiry;
 	int status = -EINVAL;
 	struct gss_api_mech *gm = NULL;
 
@@ -1184,7 +1184,7 @@ static int gss_proxy_save_rsc(struct cache_detail *cd,
 	static atomic64_t ctxhctr;
 	long long ctxh;
 	struct gss_api_mech *gm = NULL;
-	time_t expiry;
+	time64_t expiry;
 	int status = -EINVAL;
 
 	memset(&rsci, 0, sizeof(rsci));
-- 
2.20.0

[PATCH 02/19] nfs: use time64_t internally

[Arnd Bergmann]

The timestamps for the cache are all in boottime seconds, so they
don't overflow 32-bit values, but the use of time_t is deprecated
because it generally does overflow when used with wall-clock time.

There are multiple possible ways of avoiding it:

- leave time_t, which is safe here, but forces others to
  look into this code to determine that it is over and over.

- use a more generic type, like 'int' or 'long', which is known
  to be sufficient here but loses the documentation of referring
  to timestamps

- use ktime_t everywhere, and convert into seconds in the few
  places where we want realtime-seconds. The conversion is
  sometimes expensive, but not more so than the conversion we
  do today.

- use time64_t to clarify that this code is safe. Nothing would
  change for 64-bit architectures, but it is slightly less
  efficient on 32-bit architectures.

Without a clear winner of the three approaches above, this picks
the last one, favouring readability over a small performance
loss on 32-bit architectures.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 include/linux/sunrpc/cache.h      | 42 +++++++++++++++++--------------
 net/sunrpc/auth_gss/svcauth_gss.c |  2 +-
 net/sunrpc/cache.c                | 18 ++++++-------
 net/sunrpc/svcauth_unix.c         | 10 ++++----
 4 files changed, 38 insertions(+), 34 deletions(-)

diff --git a/include/linux/sunrpc/cache.h b/include/linux/sunrpc/cache.h
index f8603724fbee..fa46de3a8f2b 100644
--- a/include/linux/sunrpc/cache.h
+++ b/include/linux/sunrpc/cache.h
@@ -45,8 +45,8 @@
  */
 struct cache_head {
 	struct hlist_node	cache_list;
-	time_t		expiry_time;	/* After time time, don't use the data */
-	time_t		last_refresh;   /* If CACHE_PENDING, this is when upcall was
+	time64_t	expiry_time;	/* After time time, don't use the data */
+	time64_t	last_refresh;   /* If CACHE_PENDING, this is when upcall was
 					 * sent, else this is when update was
 					 * received, though it is alway set to
 					 * be *after* ->flush_time.
@@ -95,22 +95,22 @@ struct cache_detail {
 	/* fields below this comment are for internal use
 	 * and should not be touched by cache owners
 	 */
-	time_t			flush_time;		/* flush all cache items with
+	time64_t		flush_time;		/* flush all cache items with
 							 * last_refresh at or earlier
 							 * than this.  last_refresh
 							 * is never set at or earlier
 							 * than this.
 							 */
 	struct list_head	others;
-	time_t			nextcheck;
+	time64_t		nextcheck;
 	int			entries;
 
 	/* fields for communication over channel */
 	struct list_head	queue;
 
 	atomic_t		writers;		/* how many time is /channel open */
-	time_t			last_close;		/* if no writers, when did last close */
-	time_t			last_warn;		/* when we last warned about no writers */
+	time64_t		last_close;		/* if no writers, when did last close */
+	time64_t		last_warn;		/* when we last warned about no writers */
 
 	union {
 		struct proc_dir_entry	*procfs;
@@ -147,18 +147,22 @@ struct cache_deferred_req {
  * timestamps kept in the cache are expressed in seconds
  * since boot.  This is the best for measuring differences in
  * real time.
+ * This reimplemnts ktime_get_boottime_seconds() in a slightly
+ * faster but less accurate way. When we end up converting
+ * back to wallclock (CLOCK_REALTIME), that error often
+ * cancels out during the reverse operation.
  */
-static inline time_t seconds_since_boot(void)
+static inline time64_t seconds_since_boot(void)
 {
-	struct timespec boot;
-	getboottime(&boot);
-	return get_seconds() - boot.tv_sec;
+	struct timespec64 boot;
+	getboottime64(&boot);
+	return ktime_get_seconds() - boot.tv_sec;
 }
 
-static inline time_t convert_to_wallclock(time_t sinceboot)
+static inline time64_t convert_to_wallclock(time64_t sinceboot)
 {
-	struct timespec boot;
-	getboottime(&boot);
+	struct timespec64 boot;
+	getboottime64(&boot);
 	return boot.tv_sec + sinceboot;
 }
 
@@ -273,7 +277,7 @@ static inline int get_uint(char **bpp, unsigned int *anint)
 	return 0;
 }
 
-static inline int get_time(char **bpp, time_t *time)
+static inline int get_time(char **bpp, time64_t *time)
 {
 	char buf[50];
 	long long ll;
@@ -287,20 +291,20 @@ static inline int get_time(char **bpp, time_t *time)
 	if (kstrtoll(buf, 0, &ll))
 		return -EINVAL;
 
-	*time = (time_t)ll;
+	*time = ll;
 	return 0;
 }
 
-static inline time_t get_expiry(char **bpp)
+static inline time64_t get_expiry(char **bpp)
 {
-	time_t rv;
-	struct timespec boot;
+	time64_t rv;
+	struct timespec64 boot;
 
 	if (get_time(bpp, &rv))
 		return 0;
 	if (rv < 0)
 		return 0;
-	getboottime(&boot);
+	getboottime64(&boot);
 	return rv - boot.tv_sec;
 }
 
diff --git a/net/sunrpc/auth_gss/svcauth_gss.c b/net/sunrpc/auth_gss/svcauth_gss.c
index 30ed5585a42a..6268a2c7229d 100644
--- a/net/sunrpc/auth_gss/svcauth_gss.c
+++ b/net/sunrpc/auth_gss/svcauth_gss.c
@@ -200,7 +200,7 @@ static int rsi_parse(struct cache_detail *cd,
 	char *ep;
 	int len;
 	struct rsi rsii, *rsip = NULL;
-	time_t expiry;
+	time64_t expiry;
 	int status = -EINVAL;
 
 	memset(&rsii, 0, sizeof(rsii));
diff --git a/net/sunrpc/cache.c b/net/sunrpc/cache.c
index a349094f6fb7..18d73d1f6734 100644
--- a/net/sunrpc/cache.c
+++ b/net/sunrpc/cache.c
@@ -42,7 +42,7 @@ static bool cache_listeners_exist(struct cache_detail *detail);
 
 static void cache_init(struct cache_head *h, struct cache_detail *detail)
 {
-	time_t now = seconds_since_boot();
+	time64_t now = seconds_since_boot();
 	INIT_HLIST_NODE(&h->cache_list);
 	h->flags = 0;
 	kref_init(&h->ref);
@@ -54,7 +54,7 @@ static void cache_init(struct cache_head *h, struct cache_detail *detail)
 }
 
 static inline int cache_is_valid(struct cache_head *h);
-static void cache_fresh_locked(struct cache_head *head, time_t expiry,
+static void cache_fresh_locked(struct cache_head *head, time64_t expiry,
 				struct cache_detail *detail);
 static void cache_fresh_unlocked(struct cache_head *head,
 				struct cache_detail *detail);
@@ -145,10 +145,10 @@ EXPORT_SYMBOL_GPL(sunrpc_cache_lookup_rcu);
 
 static void cache_dequeue(struct cache_detail *detail, struct cache_head *ch);
 
-static void cache_fresh_locked(struct cache_head *head, time_t expiry,
+static void cache_fresh_locked(struct cache_head *head, time64_t expiry,
 			       struct cache_detail *detail)
 {
-	time_t now = seconds_since_boot();
+	time64_t now = seconds_since_boot();
 	if (now <= detail->flush_time)
 		/* ensure it isn't immediately treated as expired */
 		now = detail->flush_time + 1;
@@ -280,7 +280,7 @@ int cache_check(struct cache_detail *detail,
 		    struct cache_head *h, struct cache_req *rqstp)
 {
 	int rv;
-	long refresh_age, age;
+	time64_t refresh_age, age;
 
 	/* First decide return status as best we can */
 	rv = cache_is_valid(h);
@@ -294,7 +294,7 @@ int cache_check(struct cache_detail *detail,
 			rv = -ENOENT;
 	} else if (rv == -EAGAIN ||
 		   (h->expiry_time != 0 && age > refresh_age/2)) {
-		dprintk("RPC:       Want update, refage=%ld, age=%ld\n",
+		dprintk("RPC:       Want update, refage=%lld, age=%lld\n",
 				refresh_age, age);
 		if (!test_and_set_bit(CACHE_PENDING, &h->flags)) {
 			switch (cache_make_upcall(detail, h)) {
@@ -1410,7 +1410,7 @@ static int c_show(struct seq_file *m, void *p)
 		return cd->cache_show(m, cd, NULL);
 
 	ifdebug(CACHE)
-		seq_printf(m, "# expiry=%ld refcnt=%d flags=%lx\n",
+		seq_printf(m, "# expiry=%lld refcnt=%d flags=%lx\n",
 			   convert_to_wallclock(cp->expiry_time),
 			   kref_read(&cp->ref), cp->flags);
 	cache_get(cp);
@@ -1483,7 +1483,7 @@ static ssize_t read_flush(struct file *file, char __user *buf,
 	char tbuf[22];
 	size_t len;
 
-	len = snprintf(tbuf, sizeof(tbuf), "%lu\n",
+	len = snprintf(tbuf, sizeof(tbuf), "%llu\n",
 			convert_to_wallclock(cd->flush_time));
 	return simple_read_from_buffer(buf, count, ppos, tbuf, len);
 }
@@ -1494,7 +1494,7 @@ static ssize_t write_flush(struct file *file, const char __user *buf,
 {
 	char tbuf[20];
 	char *ep;
-	time_t now;
+	time64_t now;
 
 	if (*ppos || count > sizeof(tbuf)-1)
 		return -EINVAL;
diff --git a/net/sunrpc/svcauth_unix.c b/net/sunrpc/svcauth_unix.c
index 5c04ba7d456b..04aa80a2d752 100644
--- a/net/sunrpc/svcauth_unix.c
+++ b/net/sunrpc/svcauth_unix.c
@@ -166,7 +166,7 @@ static void ip_map_request(struct cache_detail *cd,
 }
 
 static struct ip_map *__ip_map_lookup(struct cache_detail *cd, char *class, struct in6_addr *addr);
-static int __ip_map_update(struct cache_detail *cd, struct ip_map *ipm, struct unix_domain *udom, time_t expiry);
+static int __ip_map_update(struct cache_detail *cd, struct ip_map *ipm, struct unix_domain *udom, time64_t expiry);
 
 static int ip_map_parse(struct cache_detail *cd,
 			  char *mesg, int mlen)
@@ -187,7 +187,7 @@ static int ip_map_parse(struct cache_detail *cd,
 
 	struct ip_map *ipmp;
 	struct auth_domain *dom;
-	time_t expiry;
+	time64_t expiry;
 
 	if (mesg[mlen-1] != '\n')
 		return -EINVAL;
@@ -308,7 +308,7 @@ static inline struct ip_map *ip_map_lookup(struct net *net, char *class,
 }
 
 static int __ip_map_update(struct cache_detail *cd, struct ip_map *ipm,
-		struct unix_domain *udom, time_t expiry)
+		struct unix_domain *udom, time64_t expiry)
 {
 	struct ip_map ip;
 	struct cache_head *ch;
@@ -328,7 +328,7 @@ static int __ip_map_update(struct cache_detail *cd, struct ip_map *ipm,
 }
 
 static inline int ip_map_update(struct net *net, struct ip_map *ipm,
-		struct unix_domain *udom, time_t expiry)
+		struct unix_domain *udom, time64_t expiry)
 {
 	struct sunrpc_net *sn;
 
@@ -491,7 +491,7 @@ static int unix_gid_parse(struct cache_detail *cd,
 	int rv;
 	int i;
 	int err;
-	time_t expiry;
+	time64_t expiry;
 	struct unix_gid ug, *ugp;
 
 	if (mesg[mlen - 1] != '\n')
-- 
2.20.0

[PATCH 03/19] nfs: use timespec64 in nfs_fattr

[Arnd Bergmann]

Push down the use of timespec64 into NFS nfs_fattr, to avoid needless
conversions, and get closer to having 64-bit time_t support on 32-bit
NFSv4 and removing some old interfaces from the kernel.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 fs/nfs/inode.c            | 54 +++++++++++++++++++--------------------
 fs/nfs/internal.h         |  6 ++---
 fs/nfs/nfs2xdr.c          |  2 +-
 fs/nfs/nfs3xdr.c          |  2 +-
 fs/nfs/nfs4xdr.c          | 24 ++++++++---------
 include/linux/nfs_fs_sb.h |  2 +-
 include/linux/nfs_xdr.h   | 12 ++++-----
 7 files changed, 51 insertions(+), 51 deletions(-)

diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 2a03bfeec10a..b0b4b9f303fd 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -504,15 +504,15 @@ nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr, st
 		nfsi->read_cache_jiffies = fattr->time_start;
 		nfsi->attr_gencount = fattr->gencount;
 		if (fattr->valid & NFS_ATTR_FATTR_ATIME)
-			inode->i_atime = timespec_to_timespec64(fattr->atime);
+			inode->i_atime = fattr->atime;
 		else if (nfs_server_capable(inode, NFS_CAP_ATIME))
 			nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME);
 		if (fattr->valid & NFS_ATTR_FATTR_MTIME)
-			inode->i_mtime = timespec_to_timespec64(fattr->mtime);
+			inode->i_mtime = fattr->mtime;
 		else if (nfs_server_capable(inode, NFS_CAP_MTIME))
 			nfs_set_cache_invalid(inode, NFS_INO_INVALID_MTIME);
 		if (fattr->valid & NFS_ATTR_FATTR_CTIME)
-			inode->i_ctime = timespec_to_timespec64(fattr->ctime);
+			inode->i_ctime = fattr->ctime;
 		else if (nfs_server_capable(inode, NFS_CAP_CTIME))
 			nfs_set_cache_invalid(inode, NFS_INO_INVALID_CTIME);
 		if (fattr->valid & NFS_ATTR_FATTR_CHANGE)
@@ -698,7 +698,7 @@ void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr,
 		if ((attr->ia_valid & ATTR_GID) != 0)
 			inode->i_gid = attr->ia_gid;
 		if (fattr->valid & NFS_ATTR_FATTR_CTIME)
-			inode->i_ctime = timespec_to_timespec64(fattr->ctime);
+			inode->i_ctime = fattr->ctime;
 		else
 			nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE
 					| NFS_INO_INVALID_CTIME);
@@ -709,14 +709,14 @@ void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr,
 		NFS_I(inode)->cache_validity &= ~(NFS_INO_INVALID_ATIME
 				| NFS_INO_INVALID_CTIME);
 		if (fattr->valid & NFS_ATTR_FATTR_ATIME)
-			inode->i_atime = timespec_to_timespec64(fattr->atime);
+			inode->i_atime = fattr->atime;
 		else if (attr->ia_valid & ATTR_ATIME_SET)
 			inode->i_atime = attr->ia_atime;
 		else
 			nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME);
 
 		if (fattr->valid & NFS_ATTR_FATTR_CTIME)
-			inode->i_ctime = timespec_to_timespec64(fattr->ctime);
+			inode->i_ctime = fattr->ctime;
 		else
 			nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE
 					| NFS_INO_INVALID_CTIME);
@@ -725,14 +725,14 @@ void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr,
 		NFS_I(inode)->cache_validity &= ~(NFS_INO_INVALID_MTIME
 				| NFS_INO_INVALID_CTIME);
 		if (fattr->valid & NFS_ATTR_FATTR_MTIME)
-			inode->i_mtime = timespec_to_timespec64(fattr->mtime);
+			inode->i_mtime = fattr->mtime;
 		else if (attr->ia_valid & ATTR_MTIME_SET)
 			inode->i_mtime = attr->ia_mtime;
 		else
 			nfs_set_cache_invalid(inode, NFS_INO_INVALID_MTIME);
 
 		if (fattr->valid & NFS_ATTR_FATTR_CTIME)
-			inode->i_ctime = timespec_to_timespec64(fattr->ctime);
+			inode->i_ctime = fattr->ctime;
 		else
 			nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE
 					| NFS_INO_INVALID_CTIME);
@@ -1351,7 +1351,7 @@ static bool nfs_file_has_buffered_writers(struct nfs_inode *nfsi)
 
 static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr)
 {
-	struct timespec ts;
+	struct timespec64 ts;
 
 	if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE)
 			&& (fattr->valid & NFS_ATTR_FATTR_CHANGE)
@@ -1361,18 +1361,18 @@ static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr)
 			nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA);
 	}
 	/* If we have atomic WCC data, we may update some attributes */
-	ts = timespec64_to_timespec(inode->i_ctime);
+	ts = inode->i_ctime;
 	if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME)
 			&& (fattr->valid & NFS_ATTR_FATTR_CTIME)
-			&& timespec_equal(&ts, &fattr->pre_ctime)) {
-		inode->i_ctime = timespec_to_timespec64(fattr->ctime);
+			&& timespec64_equal(&ts, &fattr->pre_ctime)) {
+		inode->i_ctime = fattr->ctime;
 	}
 
-	ts = timespec64_to_timespec(inode->i_mtime);
+	ts = inode->i_mtime;
 	if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME)
 			&& (fattr->valid & NFS_ATTR_FATTR_MTIME)
-			&& timespec_equal(&ts, &fattr->pre_mtime)) {
-		inode->i_mtime = timespec_to_timespec64(fattr->mtime);
+			&& timespec64_equal(&ts, &fattr->pre_mtime)) {
+		inode->i_mtime = fattr->mtime;
 		if (S_ISDIR(inode->i_mode))
 			nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA);
 	}
@@ -1398,7 +1398,7 @@ static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fat
 	struct nfs_inode *nfsi = NFS_I(inode);
 	loff_t cur_size, new_isize;
 	unsigned long invalid = 0;
-	struct timespec ts;
+	struct timespec64 ts;
 
 	if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ))
 		return 0;
@@ -1425,12 +1425,12 @@ static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fat
 			invalid |= NFS_INO_INVALID_CHANGE
 				| NFS_INO_REVAL_PAGECACHE;
 
-		ts = timespec64_to_timespec(inode->i_mtime);
-		if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&ts, &fattr->mtime))
+		ts = inode->i_mtime;
+		if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec64_equal(&ts, &fattr->mtime))
 			invalid |= NFS_INO_INVALID_MTIME;
 
-		ts = timespec64_to_timespec(inode->i_ctime);
-		if ((fattr->valid & NFS_ATTR_FATTR_CTIME) && !timespec_equal(&ts, &fattr->ctime))
+		ts = inode->i_ctime;
+		if ((fattr->valid & NFS_ATTR_FATTR_CTIME) && !timespec64_equal(&ts, &fattr->ctime))
 			invalid |= NFS_INO_INVALID_CTIME;
 
 		if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
@@ -1460,8 +1460,8 @@ static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fat
 	if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink)
 		invalid |= NFS_INO_INVALID_OTHER;
 
-	ts = timespec64_to_timespec(inode->i_atime);
-	if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&ts, &fattr->atime))
+	ts = inode->i_atime;
+	if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec64_equal(&ts, &fattr->atime))
 		invalid |= NFS_INO_INVALID_ATIME;
 
 	if (invalid != 0)
@@ -1733,12 +1733,12 @@ int nfs_post_op_update_inode_force_wcc_locked(struct inode *inode, struct nfs_fa
 	}
 	if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 &&
 			(fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) {
-		fattr->pre_ctime = timespec64_to_timespec(inode->i_ctime);
+		fattr->pre_ctime = inode->i_ctime;
 		fattr->valid |= NFS_ATTR_FATTR_PRECTIME;
 	}
 	if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 &&
 			(fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) {
-		fattr->pre_mtime = timespec64_to_timespec(inode->i_mtime);
+		fattr->pre_mtime = inode->i_mtime;
 		fattr->valid |= NFS_ATTR_FATTR_PREMTIME;
 	}
 	if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 &&
@@ -1899,7 +1899,7 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
 	}
 
 	if (fattr->valid & NFS_ATTR_FATTR_MTIME) {
-		inode->i_mtime = timespec_to_timespec64(fattr->mtime);
+		inode->i_mtime = fattr->mtime;
 	} else if (server->caps & NFS_CAP_MTIME) {
 		nfsi->cache_validity |= save_cache_validity &
 				(NFS_INO_INVALID_MTIME
@@ -1908,7 +1908,7 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
 	}
 
 	if (fattr->valid & NFS_ATTR_FATTR_CTIME) {
-		inode->i_ctime = timespec_to_timespec64(fattr->ctime);
+		inode->i_ctime = fattr->ctime;
 	} else if (server->caps & NFS_CAP_CTIME) {
 		nfsi->cache_validity |= save_cache_validity &
 				(NFS_INO_INVALID_CTIME
@@ -1946,7 +1946,7 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
 
 
 	if (fattr->valid & NFS_ATTR_FATTR_ATIME)
-		inode->i_atime = timespec_to_timespec64(fattr->atime);
+		inode->i_atime = fattr->atime;
 	else if (server->caps & NFS_CAP_ATIME) {
 		nfsi->cache_validity |= save_cache_validity &
 				(NFS_INO_INVALID_ATIME
diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
index 447a3c17fa8e..d3d3a9a0aa72 100644
--- a/fs/nfs/internal.h
+++ b/fs/nfs/internal.h
@@ -706,14 +706,14 @@ unsigned int nfs_page_array_len(unsigned int base, size_t len)
 }
 
 /*
- * Convert a struct timespec into a 64-bit change attribute
+ * Convert a struct timespec64 into a 64-bit change attribute
  *
- * This does approximately the same thing as timespec_to_ns(),
+ * This does approximately the same thing as timespec64_to_ns(),
  * but for calculation efficiency, we multiply the seconds by
  * 1024*1024*1024.
  */
 static inline
-u64 nfs_timespec_to_change_attr(const struct timespec *ts)
+u64 nfs_timespec_to_change_attr(const struct timespec64 *ts)
 {
 	return ((u64)ts->tv_sec << 30) + ts->tv_nsec;
 }
diff --git a/fs/nfs/nfs2xdr.c b/fs/nfs/nfs2xdr.c
index cbc17a203248..d4e144712034 100644
--- a/fs/nfs/nfs2xdr.c
+++ b/fs/nfs/nfs2xdr.c
@@ -234,7 +234,7 @@ static __be32 *xdr_encode_current_server_time(__be32 *p,
 	return p;
 }
 
-static __be32 *xdr_decode_time(__be32 *p, struct timespec *timep)
+static __be32 *xdr_decode_time(__be32 *p, struct timespec64 *timep)
 {
 	timep->tv_sec = be32_to_cpup(p++);
 	timep->tv_nsec = be32_to_cpup(p++) * NSEC_PER_USEC;
diff --git a/fs/nfs/nfs3xdr.c b/fs/nfs/nfs3xdr.c
index 602767850b36..2a16bbda3937 100644
--- a/fs/nfs/nfs3xdr.c
+++ b/fs/nfs/nfs3xdr.c
@@ -463,7 +463,7 @@ static __be32 *xdr_encode_nfstime3(__be32 *p, const struct timespec *timep)
 	return p;
 }
 
-static __be32 *xdr_decode_nfstime3(__be32 *p, struct timespec *timep)
+static __be32 *xdr_decode_nfstime3(__be32 *p, struct timespec64 *timep)
 {
 	timep->tv_sec = be32_to_cpup(p++);
 	timep->tv_nsec = be32_to_cpup(p++);
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index ab07db0f07cd..c917fb24c56f 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -4065,17 +4065,17 @@ static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint
 }
 
 static __be32 *
-xdr_decode_nfstime4(__be32 *p, struct timespec *t)
+xdr_decode_nfstime4(__be32 *p, struct timespec64 *t)
 {
 	__u64 sec;
 
 	p = xdr_decode_hyper(p, &sec);
-	t-> tv_sec = (time_t)sec;
+	t-> tv_sec = sec;
 	t->tv_nsec = be32_to_cpup(p++);
 	return p;
 }
 
-static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
+static int decode_attr_time(struct xdr_stream *xdr, struct timespec64 *time)
 {
 	__be32 *p;
 
@@ -4086,7 +4086,7 @@ static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
 	return 0;
 }
 
-static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
+static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
 {
 	int status = 0;
 
@@ -4100,11 +4100,11 @@ static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, str
 			status = NFS_ATTR_FATTR_ATIME;
 		bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
 	}
-	dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
+	dprintk("%s: atime=%lld\n", __func__, time->tv_sec);
 	return status;
 }
 
-static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
+static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
 {
 	int status = 0;
 
@@ -4118,12 +4118,12 @@ static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, s
 			status = NFS_ATTR_FATTR_CTIME;
 		bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
 	}
-	dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
+	dprintk("%s: ctime=%lld\n", __func__, time->tv_sec);
 	return status;
 }
 
 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
-				  struct timespec *time)
+				  struct timespec64 *time)
 {
 	int status = 0;
 
@@ -4135,8 +4135,8 @@ static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
 		status = decode_attr_time(xdr, time);
 		bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
 	}
-	dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
-		(long)time->tv_nsec);
+	dprintk("%s: time_delta=%lld %ld\n", __func__, time->tv_sec,
+		time->tv_nsec);
 	return status;
 }
 
@@ -4186,7 +4186,7 @@ static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
 	return status;
 }
 
-static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
+static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
 {
 	int status = 0;
 
@@ -4200,7 +4200,7 @@ static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, str
 			status = NFS_ATTR_FATTR_MTIME;
 		bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
 	}
-	dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
+	dprintk("%s: mtime=%lld\n", __func__, time->tv_sec);
 	return status;
 }
 
diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h
index a87fe854f008..47266870a235 100644
--- a/include/linux/nfs_fs_sb.h
+++ b/include/linux/nfs_fs_sb.h
@@ -171,7 +171,7 @@ struct nfs_server {
 
 	struct nfs_fsid		fsid;
 	__u64			maxfilesize;	/* maximum file size */
-	struct timespec		time_delta;	/* smallest time granularity */
+	struct timespec64	time_delta;	/* smallest time granularity */
 	unsigned long		mount_time;	/* when this fs was mounted */
 	struct super_block	*super;		/* VFS super block */
 	dev_t			s_dev;		/* superblock dev numbers */
diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
index 9b8324ec08f3..db5c01001937 100644
--- a/include/linux/nfs_xdr.h
+++ b/include/linux/nfs_xdr.h
@@ -62,14 +62,14 @@ struct nfs_fattr {
 	struct nfs_fsid		fsid;
 	__u64			fileid;
 	__u64			mounted_on_fileid;
-	struct timespec		atime;
-	struct timespec		mtime;
-	struct timespec		ctime;
+	struct timespec64	atime;
+	struct timespec64	mtime;
+	struct timespec64	ctime;
 	__u64			change_attr;	/* NFSv4 change attribute */
 	__u64			pre_change_attr;/* pre-op NFSv4 change attribute */
 	__u64			pre_size;	/* pre_op_attr.size	  */
-	struct timespec		pre_mtime;	/* pre_op_attr.mtime	  */
-	struct timespec		pre_ctime;	/* pre_op_attr.ctime	  */
+	struct timespec64	pre_mtime;	/* pre_op_attr.mtime	  */
+	struct timespec64	pre_ctime;	/* pre_op_attr.ctime	  */
 	unsigned long		time_start;
 	unsigned long		gencount;
 	struct nfs4_string	*owner_name;
@@ -143,7 +143,7 @@ struct nfs_fsinfo {
 	__u32			wtmult;	/* writes should be multiple of this */
 	__u32			dtpref;	/* pref. readdir transfer size */
 	__u64			maxfilesize;
-	struct timespec		time_delta; /* server time granularity */
+	struct timespec64	time_delta; /* server time granularity */
 	__u32			lease_time; /* in seconds */
 	__u32			nlayouttypes; /* number of layouttypes */
 	__u32			layouttype[NFS_MAX_LAYOUT_TYPES]; /* supported pnfs layout driver */
-- 
2.20.0

[PATCH 04/19] nfs: callback: use timespec64 in cb_getattrres

[Arnd Bergmann]

Make this use 64-bit timestamps to not lose information on 32-bit
architectures. As both the input and the ouput are 64-bit wide,
this is the obvious step.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 fs/nfs/callback.h      | 4 ++--
 fs/nfs/callback_proc.c | 4 ++--
 fs/nfs/callback_xdr.c  | 6 +++---
 3 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/fs/nfs/callback.h b/fs/nfs/callback.h
index 8f34daf85f70..549350259840 100644
--- a/fs/nfs/callback.h
+++ b/fs/nfs/callback.h
@@ -72,8 +72,8 @@ struct cb_getattrres {
 	uint32_t bitmap[2];
 	uint64_t size;
 	uint64_t change_attr;
-	struct timespec ctime;
-	struct timespec mtime;
+	struct timespec64 ctime;
+	struct timespec64 mtime;
 };
 
 struct cb_recallargs {
diff --git a/fs/nfs/callback_proc.c b/fs/nfs/callback_proc.c
index f39924ba050b..db3e7771e597 100644
--- a/fs/nfs/callback_proc.c
+++ b/fs/nfs/callback_proc.c
@@ -56,8 +56,8 @@ __be32 nfs4_callback_getattr(void *argp, void *resp,
 	res->change_attr = delegation->change_attr;
 	if (nfs_have_writebacks(inode))
 		res->change_attr++;
-	res->ctime = timespec64_to_timespec(inode->i_ctime);
-	res->mtime = timespec64_to_timespec(inode->i_mtime);
+	res->ctime = inode->i_ctime;
+	res->mtime = inode->i_mtime;
 	res->bitmap[0] = (FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE) &
 		args->bitmap[0];
 	res->bitmap[1] = (FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY) &
diff --git a/fs/nfs/callback_xdr.c b/fs/nfs/callback_xdr.c
index 73a5a5ea2976..03a20f5716c7 100644
--- a/fs/nfs/callback_xdr.c
+++ b/fs/nfs/callback_xdr.c
@@ -627,7 +627,7 @@ static __be32 encode_attr_size(struct xdr_stream *xdr, const uint32_t *bitmap, u
 	return 0;
 }
 
-static __be32 encode_attr_time(struct xdr_stream *xdr, const struct timespec *time)
+static __be32 encode_attr_time(struct xdr_stream *xdr, const struct timespec64 *time)
 {
 	__be32 *p;
 
@@ -639,14 +639,14 @@ static __be32 encode_attr_time(struct xdr_stream *xdr, const struct timespec *ti
 	return 0;
 }
 
-static __be32 encode_attr_ctime(struct xdr_stream *xdr, const uint32_t *bitmap, const struct timespec *time)
+static __be32 encode_attr_ctime(struct xdr_stream *xdr, const uint32_t *bitmap, const struct timespec64 *time)
 {
 	if (!(bitmap[1] & FATTR4_WORD1_TIME_METADATA))
 		return 0;
 	return encode_attr_time(xdr,time);
 }
 
-static __be32 encode_attr_mtime(struct xdr_stream *xdr, const uint32_t *bitmap, const struct timespec *time)
+static __be32 encode_attr_mtime(struct xdr_stream *xdr, const uint32_t *bitmap, const struct timespec64 *time)
 {
 	if (!(bitmap[1] & FATTR4_WORD1_TIME_MODIFY))
 		return 0;
-- 
2.20.0

[PATCH 05/19] nfs: fscache: use timespec64 in inode auxdata

[Arnd Bergmann]

nfs currently behaves differently on 32-bit and 64-bit kernels regarding
the on-disk format of nfs_fscache_inode_auxdata.

That format should really be the same on any kernel, and we should avoid
the 'timespec' type in order to remove that from the kernel later on.

Using plain 'timespec64' would not be good here, since that includes
implied padding and would possibly leak kernel stack data to the on-disk
format on 32-bit architectures.

struct __kernel_timespec would work as a replacement, but open-coding
the two struct members in nfs_fscache_inode_auxdata makes it more
obvious what's going on here, and keeps the current format for 64-bit
architectures.

Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 fs/nfs/fscache-index.c |  6 ++++--
 fs/nfs/fscache.c       | 18 ++++++++++++------
 fs/nfs/fscache.h       |  8 +++++---
 3 files changed, 21 insertions(+), 11 deletions(-)

diff --git a/fs/nfs/fscache-index.c b/fs/nfs/fscache-index.c
index 15f271401dcc..573b1da9342c 100644
--- a/fs/nfs/fscache-index.c
+++ b/fs/nfs/fscache-index.c
@@ -84,8 +84,10 @@ enum fscache_checkaux nfs_fscache_inode_check_aux(void *cookie_netfs_data,
 		return FSCACHE_CHECKAUX_OBSOLETE;
 
 	memset(&auxdata, 0, sizeof(auxdata));
-	auxdata.mtime = timespec64_to_timespec(nfsi->vfs_inode.i_mtime);
-	auxdata.ctime = timespec64_to_timespec(nfsi->vfs_inode.i_ctime);
+	auxdata.mtime_sec  = nfsi->vfs_inode.i_mtime.tv_sec;
+	auxdata.mtime_nsec = nfsi->vfs_inode.i_mtime.tv_nsec;
+	auxdata.ctime_sec  = nfsi->vfs_inode.i_ctime.tv_sec;
+	auxdata.ctime_nsec = nfsi->vfs_inode.i_ctime.tv_nsec;
 
 	if (NFS_SERVER(&nfsi->vfs_inode)->nfs_client->rpc_ops->version == 4)
 		auxdata.change_attr = inode_peek_iversion_raw(&nfsi->vfs_inode);
diff --git a/fs/nfs/fscache.c b/fs/nfs/fscache.c
index 3800ab6f08fa..7def925d3af5 100644
--- a/fs/nfs/fscache.c
+++ b/fs/nfs/fscache.c
@@ -238,8 +238,10 @@ void nfs_fscache_init_inode(struct inode *inode)
 		return;
 
 	memset(&auxdata, 0, sizeof(auxdata));
-	auxdata.mtime = timespec64_to_timespec(nfsi->vfs_inode.i_mtime);
-	auxdata.ctime = timespec64_to_timespec(nfsi->vfs_inode.i_ctime);
+	auxdata.mtime_sec  = nfsi->vfs_inode.i_mtime.tv_sec;
+	auxdata.mtime_nsec = nfsi->vfs_inode.i_mtime.tv_nsec;
+	auxdata.ctime_sec  = nfsi->vfs_inode.i_ctime.tv_sec;
+	auxdata.ctime_nsec = nfsi->vfs_inode.i_ctime.tv_nsec;
 
 	if (NFS_SERVER(&nfsi->vfs_inode)->nfs_client->rpc_ops->version == 4)
 		auxdata.change_attr = inode_peek_iversion_raw(&nfsi->vfs_inode);
@@ -263,8 +265,10 @@ void nfs_fscache_clear_inode(struct inode *inode)
 	dfprintk(FSCACHE, "NFS: clear cookie (0x%p/0x%p)\n", nfsi, cookie);
 
 	memset(&auxdata, 0, sizeof(auxdata));
-	auxdata.mtime = timespec64_to_timespec(nfsi->vfs_inode.i_mtime);
-	auxdata.ctime = timespec64_to_timespec(nfsi->vfs_inode.i_ctime);
+	auxdata.mtime_sec  = nfsi->vfs_inode.i_mtime.tv_sec;
+	auxdata.mtime_nsec = nfsi->vfs_inode.i_mtime.tv_nsec;
+	auxdata.ctime_sec  = nfsi->vfs_inode.i_ctime.tv_sec;
+	auxdata.ctime_nsec = nfsi->vfs_inode.i_ctime.tv_nsec;
 	fscache_relinquish_cookie(cookie, &auxdata, false);
 	nfsi->fscache = NULL;
 }
@@ -305,8 +309,10 @@ void nfs_fscache_open_file(struct inode *inode, struct file *filp)
 		return;
 
 	memset(&auxdata, 0, sizeof(auxdata));
-	auxdata.mtime = timespec64_to_timespec(nfsi->vfs_inode.i_mtime);
-	auxdata.ctime = timespec64_to_timespec(nfsi->vfs_inode.i_ctime);
+	auxdata.mtime_sec  = nfsi->vfs_inode.i_mtime.tv_sec;
+	auxdata.mtime_nsec = nfsi->vfs_inode.i_mtime.tv_nsec;
+	auxdata.ctime_sec  = nfsi->vfs_inode.i_ctime.tv_sec;
+	auxdata.ctime_nsec = nfsi->vfs_inode.i_ctime.tv_nsec;
 
 	if (inode_is_open_for_write(inode)) {
 		dfprintk(FSCACHE, "NFS: nfsi 0x%p disabling cache\n", nfsi);
diff --git a/fs/nfs/fscache.h b/fs/nfs/fscache.h
index ad041cfbf9ec..6754c8607230 100644
--- a/fs/nfs/fscache.h
+++ b/fs/nfs/fscache.h
@@ -62,9 +62,11 @@ struct nfs_fscache_key {
  * cache object.
  */
 struct nfs_fscache_inode_auxdata {
-	struct timespec	mtime;
-	struct timespec	ctime;
-	u64		change_attr;
+	s64	mtime_sec;
+	s64	mtime_nsec;
+	s64	ctime_sec;
+	s64	ctime_nsec;
+	u64	change_attr;
 };
 
 /*
-- 
2.20.0

[PATCH 06/19] nfs: remove timespec from xdr_encode_nfstime

[Arnd Bergmann]

For NFSv2 and NFSv3, timestamps are stored using 32-bit entities
and overflow in y2038. For historic reasons we truncate the
64-bit timestamps by converting from a timespec64 to a timespec
first.

Remove this unnecessary conversion step and do the truncation
in the final functions that take a timestamp.

This is transparent to users, but avoids one of the last uses
of 'timespec' and lets us remove it later.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 fs/nfs/nfs2xdr.c        | 31 +++++++++++++------------------
 fs/nfs/nfs3xdr.c        | 12 ++++--------
 include/linux/nfs_xdr.h |  2 +-
 3 files changed, 18 insertions(+), 27 deletions(-)

diff --git a/fs/nfs/nfs2xdr.c b/fs/nfs/nfs2xdr.c
index d4e144712034..0b8399fee8f7 100644
--- a/fs/nfs/nfs2xdr.c
+++ b/fs/nfs/nfs2xdr.c
@@ -209,9 +209,9 @@ static int decode_fhandle(struct xdr_stream *xdr, struct nfs_fh *fh)
  *		unsigned int useconds;
  *	};
  */
-static __be32 *xdr_encode_time(__be32 *p, const struct timespec *timep)
+static __be32 *xdr_encode_time(__be32 *p, const struct timespec64 *timep)
 {
-	*p++ = cpu_to_be32(timep->tv_sec);
+	*p++ = cpu_to_be32((u32)timep->tv_sec);
 	if (timep->tv_nsec != 0)
 		*p++ = cpu_to_be32(timep->tv_nsec / NSEC_PER_USEC);
 	else
@@ -227,7 +227,7 @@ static __be32 *xdr_encode_time(__be32 *p, const struct timespec *timep)
  * Illustrated" by Brent Callaghan, Addison-Wesley, ISBN 0-201-32750-5.
  */
 static __be32 *xdr_encode_current_server_time(__be32 *p,
-					      const struct timespec *timep)
+					      const struct timespec64 *timep)
 {
 	*p++ = cpu_to_be32(timep->tv_sec);
 	*p++ = cpu_to_be32(1000000);
@@ -339,7 +339,6 @@ static __be32 *xdr_time_not_set(__be32 *p)
 static void encode_sattr(struct xdr_stream *xdr, const struct iattr *attr,
 		struct user_namespace *userns)
 {
-	struct timespec ts;
 	__be32 *p;
 
 	p = xdr_reserve_space(xdr, NFS_sattr_sz << 2);
@@ -361,21 +360,17 @@ static void encode_sattr(struct xdr_stream *xdr, const struct iattr *attr,
 	else
 		*p++ = cpu_to_be32(NFS2_SATTR_NOT_SET);
 
-	if (attr->ia_valid & ATTR_ATIME_SET) {
-		ts = timespec64_to_timespec(attr->ia_atime);
-		p = xdr_encode_time(p, &ts);
-	} else if (attr->ia_valid & ATTR_ATIME) {
-		ts = timespec64_to_timespec(attr->ia_atime);
-		p = xdr_encode_current_server_time(p, &ts);
-	} else
+	if (attr->ia_valid & ATTR_ATIME_SET)
+		p = xdr_encode_time(p, &attr->ia_atime);
+	else if (attr->ia_valid & ATTR_ATIME)
+		p = xdr_encode_current_server_time(p, &attr->ia_atime);
+	else
 		p = xdr_time_not_set(p);
-	if (attr->ia_valid & ATTR_MTIME_SET) {
-		ts = timespec64_to_timespec(attr->ia_atime);
-		xdr_encode_time(p, &ts);
-	} else if (attr->ia_valid & ATTR_MTIME) {
-		ts = timespec64_to_timespec(attr->ia_mtime);
-		xdr_encode_current_server_time(p, &ts);
-	} else
+	if (attr->ia_valid & ATTR_MTIME_SET)
+		xdr_encode_time(p, &attr->ia_atime);
+	else if (attr->ia_valid & ATTR_MTIME)
+		xdr_encode_current_server_time(p, &attr->ia_mtime);
+	else
 		xdr_time_not_set(p);
 }
 
diff --git a/fs/nfs/nfs3xdr.c b/fs/nfs/nfs3xdr.c
index 2a16bbda3937..927eb680f161 100644
--- a/fs/nfs/nfs3xdr.c
+++ b/fs/nfs/nfs3xdr.c
@@ -456,9 +456,9 @@ static void zero_nfs_fh3(struct nfs_fh *fh)
  *		uint32	nseconds;
  *	};
  */
-static __be32 *xdr_encode_nfstime3(__be32 *p, const struct timespec *timep)
+static __be32 *xdr_encode_nfstime3(__be32 *p, const struct timespec64 *timep)
 {
-	*p++ = cpu_to_be32(timep->tv_sec);
+	*p++ = cpu_to_be32((u32)timep->tv_sec);
 	*p++ = cpu_to_be32(timep->tv_nsec);
 	return p;
 }
@@ -533,7 +533,6 @@ static __be32 *xdr_decode_nfstime3(__be32 *p, struct timespec64 *timep)
 static void encode_sattr3(struct xdr_stream *xdr, const struct iattr *attr,
 		struct user_namespace *userns)
 {
-	struct timespec ts;
 	u32 nbytes;
 	__be32 *p;
 
@@ -583,10 +582,8 @@ static void encode_sattr3(struct xdr_stream *xdr, const struct iattr *attr,
 		*p++ = xdr_zero;
 
 	if (attr->ia_valid & ATTR_ATIME_SET) {
-		struct timespec ts;
 		*p++ = xdr_two;
-		ts = timespec64_to_timespec(attr->ia_atime);
-		p = xdr_encode_nfstime3(p, &ts);
+		p = xdr_encode_nfstime3(p, &attr->ia_atime);
 	} else if (attr->ia_valid & ATTR_ATIME) {
 		*p++ = xdr_one;
 	} else
@@ -594,8 +591,7 @@ static void encode_sattr3(struct xdr_stream *xdr, const struct iattr *attr,
 
 	if (attr->ia_valid & ATTR_MTIME_SET) {
 		*p++ = xdr_two;
-		ts = timespec64_to_timespec(attr->ia_mtime);
-		xdr_encode_nfstime3(p, &ts);
+		xdr_encode_nfstime3(p, &attr->ia_mtime);
 	} else if (attr->ia_valid & ATTR_MTIME) {
 		*p = xdr_one;
 	} else
diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
index db5c01001937..22bc6613474e 100644
--- a/include/linux/nfs_xdr.h
+++ b/include/linux/nfs_xdr.h
@@ -869,7 +869,7 @@ struct nfs3_sattrargs {
 	struct nfs_fh *		fh;
 	struct iattr *		sattr;
 	unsigned int		guard;
-	struct timespec		guardtime;
+	struct timespec64	guardtime;
 };
 
 struct nfs3_diropargs {
-- 
2.20.0

[PATCH 07/19] nfs: encode nfsv4 timestamps as 64-bit

[Arnd Bergmann]

On 32-bit architectures, xdr_encode_nfstime4() needlessly
truncates timestamps to a 32-bit value in the range between
year 1902 and 2038.

Change it to use 'struct timespec64' to allow the entire range
of values supported by the server.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 fs/nfs/nfs4xdr.c | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index c917fb24c56f..a5737f0bac4d 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -1059,9 +1059,9 @@ static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *ve
 }
 
 static __be32 *
-xdr_encode_nfstime4(__be32 *p, const struct timespec *t)
+xdr_encode_nfstime4(__be32 *p, const struct timespec64 *t)
 {
-	p = xdr_encode_hyper(p, (__s64)t->tv_sec);
+	p = xdr_encode_hyper(p, t->tv_sec);
 	*p++ = cpu_to_be32(t->tv_nsec);
 	return p;
 }
@@ -1072,7 +1072,6 @@ static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
 				const struct nfs_server *server,
 				const uint32_t attrmask[])
 {
-	struct timespec ts;
 	char owner_name[IDMAP_NAMESZ];
 	char owner_group[IDMAP_NAMESZ];
 	int owner_namelen = 0;
@@ -1161,16 +1160,14 @@ static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
 	if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
 		if (iap->ia_valid & ATTR_ATIME_SET) {
 			*p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
-			ts = timespec64_to_timespec(iap->ia_atime);
-			p = xdr_encode_nfstime4(p, &ts);
+			p = xdr_encode_nfstime4(p, &iap->ia_atime);
 		} else
 			*p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
 	}
 	if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
 		if (iap->ia_valid & ATTR_MTIME_SET) {
 			*p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
-			ts = timespec64_to_timespec(iap->ia_mtime);
-			p = xdr_encode_nfstime4(p, &ts);
+			p = xdr_encode_nfstime4(p, &iap->ia_mtime);
 		} else
 			*p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
 	}
-- 
2.20.0

[PATCH 08/19] nfsd: use ktime_get_seconds() for timestamps

[Arnd Bergmann]

The delegation logic in nfsd uses the somewhat inefficient
seconds_since_boot() function to record time intervals.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 fs/nfsd/nfs4state.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index c65aeaa812d4..a20795b5053c 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -806,7 +806,7 @@ static void nfs4_free_deleg(struct nfs4_stid *stid)
 static DEFINE_SPINLOCK(blocked_delegations_lock);
 static struct bloom_pair {
 	int	entries, old_entries;
-	time_t	swap_time;
+	time64_t swap_time;
 	int	new; /* index into 'set' */
 	DECLARE_BITMAP(set[2], 256);
 } blocked_delegations;
@@ -818,15 +818,15 @@ static int delegation_blocked(struct knfsd_fh *fh)
 
 	if (bd->entries == 0)
 		return 0;
-	if (seconds_since_boot() - bd->swap_time > 30) {
+	if (ktime_get_seconds() - bd->swap_time > 30) {
 		spin_lock(&blocked_delegations_lock);
-		if (seconds_since_boot() - bd->swap_time > 30) {
+		if (ktime_get_seconds() - bd->swap_time > 30) {
 			bd->entries -= bd->old_entries;
 			bd->old_entries = bd->entries;
 			memset(bd->set[bd->new], 0,
 			       sizeof(bd->set[0]));
 			bd->new = 1-bd->new;
-			bd->swap_time = seconds_since_boot();
+			bd->swap_time = ktime_get_seconds();
 		}
 		spin_unlock(&blocked_delegations_lock);
 	}
@@ -856,7 +856,7 @@ static void block_delegations(struct knfsd_fh *fh)
 	__set_bit((hash>>8)&255, bd->set[bd->new]);
 	__set_bit((hash>>16)&255, bd->set[bd->new]);
 	if (bd->entries == 0)
-		bd->swap_time = seconds_since_boot();
+		bd->swap_time = ktime_get_seconds();
 	bd->entries += 1;
 	spin_unlock(&blocked_delegations_lock);
 }
-- 
2.20.0

[PATCH 09/19] nfsd: print 64-bit timestamps in client_info_show

[Arnd Bergmann]

The nii_time field gets truncated to 'time_t' on 32-bit architectures
before printing.

Remove the use of 'struct timespec' to product the correct output
beyond 2038.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 fs/nfsd/nfs4state.c | 5 ++---
 fs/nfsd/state.h     | 2 +-
 2 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index a20795b5053c..2333924d7c6b 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -2292,7 +2292,7 @@ static int client_info_show(struct seq_file *m, void *v)
 					clp->cl_nii_domain.len);
 		seq_printf(m, "\nImplementation name: ");
 		seq_quote_mem(m, clp->cl_nii_name.data, clp->cl_nii_name.len);
-		seq_printf(m, "\nImplementation time: [%ld, %ld]\n",
+		seq_printf(m, "\nImplementation time: [%lld, %ld]\n",
 			clp->cl_nii_time.tv_sec, clp->cl_nii_time.tv_nsec);
 	}
 	drop_client(clp);
@@ -2946,8 +2946,7 @@ static __be32 copy_impl_id(struct nfs4_client *clp,
 	xdr_netobj_dup(&clp->cl_nii_name, &exid->nii_name, GFP_KERNEL);
 	if (!clp->cl_nii_name.data)
 		return nfserr_jukebox;
-	clp->cl_nii_time.tv_sec = exid->nii_time.tv_sec;
-	clp->cl_nii_time.tv_nsec = exid->nii_time.tv_nsec;
+	clp->cl_nii_time = exid->nii_time;
 	return 0;
 }
 
diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h
index 46f56afb6cb8..ce32ba445343 100644
--- a/fs/nfsd/state.h
+++ b/fs/nfsd/state.h
@@ -320,7 +320,7 @@ struct nfs4_client {
 	/* NFSv4.1 client implementation id: */
 	struct xdr_netobj	cl_nii_domain;
 	struct xdr_netobj	cl_nii_name;
-	struct timespec		cl_nii_time;
+	struct timespec64	cl_nii_time;
 
 	/* for v4.0 and v4.1 callbacks: */
 	struct nfs4_cb_conn	cl_cb_conn;
-- 
2.20.0

[PATCH 10/19] nfsd: handle nfs3 timestamps as unsigned

[Arnd Bergmann]

The decode_time3 function behaves differently on 32-bit
and 64-bit architectures: on the former, a 32-bit timestamp
gets converted into an signed number and then into a timestamp
between 1902 and 2038, while on the latter it is interpreted
as unsigned in the range 1970-2106.

Change all the remaining 'timespec' in nfsd to 'timespec64'
to make the behavior the same, and use the current interpretation
of the dominant 64-bit architectures.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 fs/nfsd/nfs3xdr.c | 20 ++++++++------------
 fs/nfsd/nfsfh.h   |  4 ++--
 2 files changed, 10 insertions(+), 14 deletions(-)

diff --git a/fs/nfsd/nfs3xdr.c b/fs/nfsd/nfs3xdr.c
index 86e5658651f1..0ace5ae0775c 100644
--- a/fs/nfsd/nfs3xdr.c
+++ b/fs/nfsd/nfs3xdr.c
@@ -32,14 +32,14 @@ static u32	nfs3_ftypes[] = {
  * XDR functions for basic NFS types
  */
 static __be32 *
-encode_time3(__be32 *p, struct timespec *time)
+encode_time3(__be32 *p, struct timespec64 *time)
 {
 	*p++ = htonl((u32) time->tv_sec); *p++ = htonl(time->tv_nsec);
 	return p;
 }
 
 static __be32 *
-decode_time3(__be32 *p, struct timespec *time)
+decode_time3(__be32 *p, struct timespec64 *time)
 {
 	time->tv_sec = ntohl(*p++);
 	time->tv_nsec = ntohl(*p++);
@@ -167,7 +167,6 @@ encode_fattr3(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp,
 	      struct kstat *stat)
 {
 	struct user_namespace *userns = nfsd_user_namespace(rqstp);
-	struct timespec ts;
 	*p++ = htonl(nfs3_ftypes[(stat->mode & S_IFMT) >> 12]);
 	*p++ = htonl((u32) (stat->mode & S_IALLUGO));
 	*p++ = htonl((u32) stat->nlink);
@@ -183,12 +182,9 @@ encode_fattr3(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp,
 	*p++ = htonl((u32) MINOR(stat->rdev));
 	p = encode_fsid(p, fhp);
 	p = xdr_encode_hyper(p, stat->ino);
-	ts = timespec64_to_timespec(stat->atime);
-	p = encode_time3(p, &ts);
-	ts = timespec64_to_timespec(stat->mtime);
-	p = encode_time3(p, &ts);
-	ts = timespec64_to_timespec(stat->ctime);
-	p = encode_time3(p, &ts);
+	p = encode_time3(p, &stat->atime);
+	p = encode_time3(p, &stat->mtime);
+	p = encode_time3(p, &stat->ctime);
 
 	return p;
 }
@@ -277,8 +273,8 @@ void fill_pre_wcc(struct svc_fh *fhp)
 		stat.size  = inode->i_size;
 	}
 
-	fhp->fh_pre_mtime = timespec64_to_timespec(stat.mtime);
-	fhp->fh_pre_ctime = timespec64_to_timespec(stat.ctime);
+	fhp->fh_pre_mtime = stat.mtime;
+	fhp->fh_pre_ctime = stat.ctime;
 	fhp->fh_pre_size  = stat.size;
 	fhp->fh_pre_change = nfsd4_change_attribute(&stat, inode);
 	fhp->fh_pre_saved = true;
@@ -330,7 +326,7 @@ nfs3svc_decode_sattrargs(struct svc_rqst *rqstp, __be32 *p)
 	p = decode_sattr3(p, &args->attrs, nfsd_user_namespace(rqstp));
 
 	if ((args->check_guard = ntohl(*p++)) != 0) { 
-		struct timespec time; 
+		struct timespec64 time;
 		p = decode_time3(p, &time);
 		args->guardtime = time.tv_sec;
 	}
diff --git a/fs/nfsd/nfsfh.h b/fs/nfsd/nfsfh.h
index 755e256a9103..495540a248a1 100644
--- a/fs/nfsd/nfsfh.h
+++ b/fs/nfsd/nfsfh.h
@@ -42,8 +42,8 @@ typedef struct svc_fh {
 
 	/* Pre-op attributes saved during fh_lock */
 	__u64			fh_pre_size;	/* size before operation */
-	struct timespec		fh_pre_mtime;	/* mtime before oper */
-	struct timespec		fh_pre_ctime;	/* ctime before oper */
+	struct timespec64	fh_pre_mtime;	/* mtime before oper */
+	struct timespec64	fh_pre_ctime;	/* ctime before oper */
 	/*
 	 * pre-op nfsv4 change attr: note must check IS_I_VERSION(inode)
 	 *  to find out if it is valid.
-- 
2.20.0

[PATCH 11/19] nfsd: use timespec64 in encode_time_delta

[Arnd Bergmann]

The values in encode_time_delta are always small and don't
overflow the range of 'struct timespec', so changing it has
no effect.

Change it to timespec64 as a prerequisite for removing the
timespec definition later.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 fs/nfsd/nfs4xdr.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 533d0fc3c96b..d8234d9e89fe 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -2024,11 +2024,11 @@ static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode,
  */
 static __be32 *encode_time_delta(__be32 *p, struct inode *inode)
 {
-	struct timespec ts;
+	struct timespec64 ts;
 	u32 ns;
 
 	ns = max_t(u32, NSEC_PER_SEC/HZ, inode->i_sb->s_time_gran);
-	ts = ns_to_timespec(ns);
+	ts = ns_to_timespec64(ns);
 
 	p = xdr_encode_hyper(p, ts.tv_sec);
 	*p++ = cpu_to_be32(ts.tv_nsec);
-- 
2.20.0

[PATCH 12/19] nfsd: make 'boot_time' 64-bit wide

[Arnd Bergmann]

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>
---
 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

[PATCH 13/19] nfsd: pass a 64-bit guardtime to nfsd_setattr()

[Arnd Bergmann]

Guardtime handling in nfs3 differs between 32-bit and 64-bit
architectures, and uses the deprecated time_t type.

Change it to using time64_t, which behaves the same way on
64-bit and 32-bit architectures, treating the number as an
unsigned 32-bit entity with a range of year 1970 to 2106
consistently, and avoiding the y2038 overflow.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 fs/nfsd/nfs4proc.c  | 2 +-
 fs/nfsd/nfs4state.c | 2 +-
 fs/nfsd/nfsproc.c   | 4 ++--
 fs/nfsd/vfs.c       | 4 ++--
 fs/nfsd/vfs.h       | 2 +-
 fs/nfsd/xdr3.h      | 2 +-
 6 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index 4e3e77b76411..b595f6d6d0d9 100644
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -975,7 +975,7 @@ nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 	if (status)
 		goto out;
 	status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
-				0, (time_t)0);
+				0, (time64_t)0);
 out:
 	fh_drop_write(&cstate->current_fh);
 	return status;
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 70a953b03be4..1ea7a40f8d4e 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -4666,7 +4666,7 @@ nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh,
 		return 0;
 	if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
 		return nfserr_inval;
-	return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0);
+	return nfsd_setattr(rqstp, fh, &iattr, 0, (time64_t)0);
 }
 
 static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp,
diff --git a/fs/nfsd/nfsproc.c b/fs/nfsd/nfsproc.c
index c83ddac22f38..aa013b736073 100644
--- a/fs/nfsd/nfsproc.c
+++ b/fs/nfsd/nfsproc.c
@@ -113,7 +113,7 @@ nfsd_proc_setattr(struct svc_rqst *rqstp)
 		}
 	}
 
-	nfserr = nfsd_setattr(rqstp, fhp, iap, 0, (time_t)0);
+	nfserr = nfsd_setattr(rqstp, fhp, iap, 0, (time64_t)0);
 done:
 	return nfsd_return_attrs(nfserr, resp);
 }
@@ -380,7 +380,7 @@ nfsd_proc_create(struct svc_rqst *rqstp)
 		 */
 		attr->ia_valid &= ATTR_SIZE;
 		if (attr->ia_valid)
-			nfserr = nfsd_setattr(rqstp, newfhp, attr, 0, (time_t)0);
+			nfserr = nfsd_setattr(rqstp, newfhp, attr, 0, (time64_t)0);
 	}
 
 out_unlock:
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index bd0a385df3fc..c0d8fdfd3b90 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -358,7 +358,7 @@ nfsd_get_write_access(struct svc_rqst *rqstp, struct svc_fh *fhp,
  */
 __be32
 nfsd_setattr(struct svc_rqst *rqstp, struct svc_fh *fhp, struct iattr *iap,
-	     int check_guard, time_t guardtime)
+	     int check_guard, time64_t guardtime)
 {
 	struct dentry	*dentry;
 	struct inode	*inode;
@@ -1117,7 +1117,7 @@ nfsd_create_setattr(struct svc_rqst *rqstp, struct svc_fh *resfhp,
 	if (!uid_eq(current_fsuid(), GLOBAL_ROOT_UID))
 		iap->ia_valid &= ~(ATTR_UID|ATTR_GID);
 	if (iap->ia_valid)
-		return nfsd_setattr(rqstp, resfhp, iap, 0, (time_t)0);
+		return nfsd_setattr(rqstp, resfhp, iap, 0, (time64_t)0);
 	/* Callers expect file metadata to be committed here */
 	return nfserrno(commit_metadata(resfhp));
 }
diff --git a/fs/nfsd/vfs.h b/fs/nfsd/vfs.h
index a13fd9d7e1f5..07e612b90757 100644
--- a/fs/nfsd/vfs.h
+++ b/fs/nfsd/vfs.h
@@ -48,7 +48,7 @@ __be32		 nfsd_lookup_dentry(struct svc_rqst *, struct svc_fh *,
 				const char *, unsigned int,
 				struct svc_export **, struct dentry **);
 __be32		nfsd_setattr(struct svc_rqst *, struct svc_fh *,
-				struct iattr *, int, time_t);
+				struct iattr *, int, time64_t);
 int nfsd_mountpoint(struct dentry *, struct svc_export *);
 #ifdef CONFIG_NFSD_V4
 __be32          nfsd4_set_nfs4_label(struct svc_rqst *, struct svc_fh *,
diff --git a/fs/nfsd/xdr3.h b/fs/nfsd/xdr3.h
index 99ff9f403ff1..0fa12988fb6a 100644
--- a/fs/nfsd/xdr3.h
+++ b/fs/nfsd/xdr3.h
@@ -14,7 +14,7 @@ struct nfsd3_sattrargs {
 	struct svc_fh		fh;
 	struct iattr		attrs;
 	int			check_guard;
-	time_t			guardtime;
+	time64_t		guardtime;
 };
 
 struct nfsd3_diropargs {
-- 
2.20.0

[PATCH 14/19] nfsd: use time64_t in nfsd_proc_setattr() check

[Arnd Bergmann]

Change to time64_t and ktime_get_real_seconds() to make the
logic work correctly on 32-bit architectures beyond 2038.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 fs/nfsd/nfsproc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/nfsd/nfsproc.c b/fs/nfsd/nfsproc.c
index aa013b736073..b25c90be29fb 100644
--- a/fs/nfsd/nfsproc.c
+++ b/fs/nfsd/nfsproc.c
@@ -94,7 +94,7 @@ nfsd_proc_setattr(struct svc_rqst *rqstp)
 		 * Solaris, at least, doesn't seem to care what the time
 		 * request is.  We require it be within 30 minutes of now.
 		 */
-		time_t delta = iap->ia_atime.tv_sec - get_seconds();
+		time64_t delta = iap->ia_atime.tv_sec - ktime_get_real_seconds();
 
 		nfserr = fh_verify(rqstp, fhp, 0, NFSD_MAY_NOP);
 		if (nfserr)
-- 
2.20.0

[PATCH 15/19] nfsd: fix delay timer on 32-bit architectures

[Arnd Bergmann]

The nfsd4_cb_layout_done() function takes a 'time_t' value,
multiplied by NSEC_PER_SEC*2 to get a nanosecond value.

This works fine on 64-bit architectures, but on 32-bit, any
value over 1 second results in a signed integer overflow
with unexpected results.

Cast one input to a 64-bit type in order to produce the
same result that we have on 64-bit architectures, regarless
of the type of nfsd4_lease.

Fixes: 6b9b21073d3b ("nfsd: give up on CB_LAYOUTRECALLs after two lease periods")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 fs/nfsd/nfs4layouts.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/nfsd/nfs4layouts.c b/fs/nfsd/nfs4layouts.c
index 2681c70283ce..e12409eca7cc 100644
--- a/fs/nfsd/nfs4layouts.c
+++ b/fs/nfsd/nfs4layouts.c
@@ -675,7 +675,7 @@ nfsd4_cb_layout_done(struct nfsd4_callback *cb, struct rpc_task *task)
 
 		/* Client gets 2 lease periods to return it */
 		cutoff = ktime_add_ns(task->tk_start,
-					 nn->nfsd4_lease * NSEC_PER_SEC * 2);
+					 (u64)nn->nfsd4_lease * NSEC_PER_SEC * 2);
 
 		if (ktime_before(now, cutoff)) {
 			rpc_delay(task, HZ/100); /* 10 mili-seconds */
-- 
2.20.0

[PATCH 16/19] nfsd: fix jiffies/time_t mixup in LRU list

[Arnd Bergmann]

The nfsd4_blocked_lock->nbl_time timestamp is recorded in jiffies,
but then compared to a CLOCK_REALTIME timestamp later on, which makes
no sense.

For consistency with the other timestamps, change this to use a time_t.

This is a change in behavior, which may cause regressions, but the
current code is not sensible. On a system with CONFIG_HZ=1000,
the 'time_after((unsigned long)nbl->nbl_time, (unsigned long)cutoff))'
check is false for roughly the first 18 days of uptime and then true
for the next 49 days.

Fixes: 7919d0a27f1e ("nfsd: add a LRU list for blocked locks")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 fs/nfsd/nfs4state.c | 2 +-
 fs/nfsd/state.h     | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 1ea7a40f8d4e..551068f4b836 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -6544,7 +6544,7 @@ nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 	}
 
 	if (fl_flags & FL_SLEEP) {
-		nbl->nbl_time = jiffies;
+		nbl->nbl_time = get_seconds();
 		spin_lock(&nn->blocked_locks_lock);
 		list_add_tail(&nbl->nbl_list, &lock_sop->lo_blocked);
 		list_add_tail(&nbl->nbl_lru, &nn->blocked_locks_lru);
diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h
index ce32ba445343..c1bb6a5ecf57 100644
--- a/fs/nfsd/state.h
+++ b/fs/nfsd/state.h
@@ -605,7 +605,7 @@ static inline bool nfsd4_stateid_generation_after(stateid_t *a, stateid_t *b)
 struct nfsd4_blocked_lock {
 	struct list_head	nbl_list;
 	struct list_head	nbl_lru;
-	unsigned long		nbl_time;
+	time_t			nbl_time;
 	struct file_lock	nbl_lock;
 	struct knfsd_fh		nbl_fh;
 	struct nfsd4_callback	nbl_cb;
-- 
2.20.0

[PATCH 17/19] nfsd: use boottime for lease expiry alculation

[Arnd Bergmann]

A couple of time_t variables are only used to track the state of the
lease time and its expiration. The code correctly uses the 'time_after()'
macro to make this work on 32-bit architectures even beyond year 2038,
but the get_seconds() function and the time_t type itself are deprecated
as they behave inconsistently between 32-bit and 64-bit architectures
and often lead to code that is not y2038 safe.

As a minor issue, using get_seconds() leads to problems with concurrent
settimeofday() or clock_settime() calls, in the worst case timeout never
triggering after the time has been set backwards.

Change nfsd to use time64_t and ktime_get_boottime_seconds() here. This
is clearly excessive, as boottime by itself means we never go beyond 32
bits, but it does mean we handle this correctly and consistently without
having to worry about corner cases and should be no more expensive than
the previous implementation on 64-bit architectures.

The max_cb_time() function gets changed in order to avoid an expensive
64-bit division operation, but as the lease time is at most one hour,
there is no change in behavior.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 fs/nfsd/netns.h        |  4 ++--
 fs/nfsd/nfs4callback.c |  7 ++++++-
 fs/nfsd/nfs4state.c    | 41 +++++++++++++++++++----------------------
 fs/nfsd/nfsctl.c       |  6 +++---
 fs/nfsd/state.h        |  8 ++++----
 5 files changed, 34 insertions(+), 32 deletions(-)

diff --git a/fs/nfsd/netns.h b/fs/nfsd/netns.h
index 29bbe28eda53..2baf32311e00 100644
--- a/fs/nfsd/netns.h
+++ b/fs/nfsd/netns.h
@@ -92,8 +92,8 @@ struct nfsd_net {
 	bool in_grace;
 	const struct nfsd4_client_tracking_ops *client_tracking_ops;
 
-	time_t nfsd4_lease;
-	time_t nfsd4_grace;
+	time64_t nfsd4_lease;
+	time64_t nfsd4_grace;
 	bool somebody_reclaimed;
 
 	bool track_reclaim_completes;
diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
index 524111420b48..b03d6bf1b1bc 100644
--- a/fs/nfsd/nfs4callback.c
+++ b/fs/nfsd/nfs4callback.c
@@ -823,7 +823,12 @@ static const struct rpc_program cb_program = {
 static int max_cb_time(struct net *net)
 {
 	struct nfsd_net *nn = net_generic(net, nfsd_net_id);
-	return max(nn->nfsd4_lease/10, (time_t)1) * HZ;
+
+	/* nfsd4_lease is set to at most one hour */
+	if (WARN_ON_ONCE(nn->nfsd4_lease > 3600))
+		return 360 * HZ;
+
+	return max(((u32)nn->nfsd4_lease)/10, 1u) * HZ;
 }
 
 static const struct cred *get_backchannel_cred(struct nfs4_client *clp, struct rpc_clnt *client, struct nfsd4_session *ses)
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 551068f4b836..885a09b3a2c0 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -170,7 +170,7 @@ renew_client_locked(struct nfs4_client *clp)
 			clp->cl_clientid.cl_boot,
 			clp->cl_clientid.cl_id);
 	list_move_tail(&clp->cl_lru, &nn->client_lru);
-	clp->cl_time = get_seconds();
+	clp->cl_time = ktime_get_boottime_seconds();
 }
 
 static void put_client_renew_locked(struct nfs4_client *clp)
@@ -2612,7 +2612,7 @@ static struct nfs4_client *create_client(struct xdr_netobj name,
 	gen_clid(clp, nn);
 	kref_init(&clp->cl_nfsdfs.cl_ref);
 	nfsd4_init_cb(&clp->cl_cb_null, clp, NULL, NFSPROC4_CLNT_CB_NULL);
-	clp->cl_time = get_seconds();
+	clp->cl_time = ktime_get_boottime_seconds();
 	clear_bit(0, &clp->cl_cb_slot_busy);
 	copy_verf(clp, verf);
 	memcpy(&clp->cl_addr, sa, sizeof(struct sockaddr_storage));
@@ -4277,7 +4277,7 @@ move_to_close_lru(struct nfs4_ol_stateid *s, struct net *net)
 	last = oo->oo_last_closed_stid;
 	oo->oo_last_closed_stid = s;
 	list_move_tail(&oo->oo_close_lru, &nn->close_lru);
-	oo->oo_time = get_seconds();
+	oo->oo_time = ktime_get_boottime_seconds();
 	spin_unlock(&nn->client_lock);
 	if (last)
 		nfs4_put_stid(&last->st_stid);
@@ -4372,7 +4372,7 @@ static void nfsd4_cb_recall_prepare(struct nfsd4_callback *cb)
 	 */
 	spin_lock(&state_lock);
 	if (dp->dl_time == 0) {
-		dp->dl_time = get_seconds();
+		dp->dl_time = ktime_get_boottime_seconds();
 		list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru);
 	}
 	spin_unlock(&state_lock);
@@ -5178,9 +5178,8 @@ nfsd4_end_grace(struct nfsd_net *nn)
  */
 static bool clients_still_reclaiming(struct nfsd_net *nn)
 {
-	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;
+	time64_t double_grace_period_end = nn->boot_time +
+					   2 * nn->nfsd4_lease;
 
 	if (nn->track_reclaim_completes &&
 			atomic_read(&nn->nr_reclaim_complete) ==
@@ -5193,12 +5192,12 @@ static bool clients_still_reclaiming(struct nfsd_net *nn)
 	 * If we've given them *two* lease times to reclaim, and they're
 	 * still not done, give up:
 	 */
-	if (time_after(now, double_grace_period_end))
+	if (ktime_get_boottime_seconds() > double_grace_period_end)
 		return false;
 	return true;
 }
 
-static time_t
+static time64_t
 nfs4_laundromat(struct nfsd_net *nn)
 {
 	struct nfs4_client *clp;
@@ -5207,8 +5206,8 @@ nfs4_laundromat(struct nfsd_net *nn)
 	struct nfs4_ol_stateid *stp;
 	struct nfsd4_blocked_lock *nbl;
 	struct list_head *pos, *next, reaplist;
-	time_t cutoff = get_seconds() - nn->nfsd4_lease;
-	time_t t, new_timeo = nn->nfsd4_lease;
+	time64_t cutoff = ktime_get_boottime_seconds() - nn->nfsd4_lease;
+	time64_t t, new_timeo = nn->nfsd4_lease;
 
 	dprintk("NFSD: laundromat service - starting\n");
 
@@ -5222,7 +5221,7 @@ nfs4_laundromat(struct nfsd_net *nn)
 	spin_lock(&nn->client_lock);
 	list_for_each_safe(pos, next, &nn->client_lru) {
 		clp = list_entry(pos, struct nfs4_client, cl_lru);
-		if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) {
+		if (clp->cl_time > cutoff) {
 			t = clp->cl_time - cutoff;
 			new_timeo = min(new_timeo, t);
 			break;
@@ -5245,7 +5244,7 @@ nfs4_laundromat(struct nfsd_net *nn)
 	spin_lock(&state_lock);
 	list_for_each_safe(pos, next, &nn->del_recall_lru) {
 		dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
-		if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) {
+		if (dp->dl_time > cutoff) {
 			t = dp->dl_time - cutoff;
 			new_timeo = min(new_timeo, t);
 			break;
@@ -5265,8 +5264,7 @@ nfs4_laundromat(struct nfsd_net *nn)
 	while (!list_empty(&nn->close_lru)) {
 		oo = list_first_entry(&nn->close_lru, struct nfs4_openowner,
 					oo_close_lru);
-		if (time_after((unsigned long)oo->oo_time,
-			       (unsigned long)cutoff)) {
+		if (oo->oo_time > cutoff) {
 			t = oo->oo_time - cutoff;
 			new_timeo = min(new_timeo, t);
 			break;
@@ -5296,8 +5294,7 @@ nfs4_laundromat(struct nfsd_net *nn)
 	while (!list_empty(&nn->blocked_locks_lru)) {
 		nbl = list_first_entry(&nn->blocked_locks_lru,
 					struct nfsd4_blocked_lock, nbl_lru);
-		if (time_after((unsigned long)nbl->nbl_time,
-			       (unsigned long)cutoff)) {
+		if (nbl->nbl_time > cutoff) {
 			t = nbl->nbl_time - cutoff;
 			new_timeo = min(new_timeo, t);
 			break;
@@ -5314,7 +5311,7 @@ nfs4_laundromat(struct nfsd_net *nn)
 		free_blocked_lock(nbl);
 	}
 out:
-	new_timeo = max_t(time_t, new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT);
+	new_timeo = max_t(time64_t, new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT);
 	return new_timeo;
 }
 
@@ -5324,13 +5321,13 @@ static void laundromat_main(struct work_struct *);
 static void
 laundromat_main(struct work_struct *laundry)
 {
-	time_t t;
+	time64_t t;
 	struct delayed_work *dwork = to_delayed_work(laundry);
 	struct nfsd_net *nn = container_of(dwork, struct nfsd_net,
 					   laundromat_work);
 
 	t = nfs4_laundromat(nn);
-	dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t);
+	dprintk("NFSD: laundromat_main - sleeping for %lld seconds\n", t);
 	queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ);
 }
 
@@ -6544,7 +6541,7 @@ nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 	}
 
 	if (fl_flags & FL_SLEEP) {
-		nbl->nbl_time = get_seconds();
+		nbl->nbl_time = ktime_get_boottime_seconds();
 		spin_lock(&nn->blocked_locks_lock);
 		list_add_tail(&nbl->nbl_list, &lock_sop->lo_blocked);
 		list_add_tail(&nbl->nbl_lru, &nn->blocked_locks_lru);
@@ -7704,7 +7701,7 @@ nfs4_state_start_net(struct net *net)
 	nfsd4_client_tracking_init(net);
 	if (nn->track_reclaim_completes && nn->reclaim_str_hashtbl_size == 0)
 		goto skip_grace;
-	printk(KERN_INFO "NFSD: starting %ld-second grace period (net %x)\n",
+	printk(KERN_INFO "NFSD: starting %lld-second grace period (net %x)\n",
 	       nn->nfsd4_grace, net->ns.inum);
 	queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ);
 	return 0;
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index 11b42c523f04..aace740d5a92 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -956,7 +956,7 @@ static ssize_t write_maxconn(struct file *file, char *buf, size_t size)
 
 #ifdef CONFIG_NFSD_V4
 static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size,
-				  time_t *time, struct nfsd_net *nn)
+				  time64_t *time, struct nfsd_net *nn)
 {
 	char *mesg = buf;
 	int rv, i;
@@ -984,11 +984,11 @@ static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size,
 		*time = i;
 	}
 
-	return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%ld\n", *time);
+	return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%lld\n", *time);
 }
 
 static ssize_t nfsd4_write_time(struct file *file, char *buf, size_t size,
-				time_t *time, struct nfsd_net *nn)
+				time64_t *time, struct nfsd_net *nn)
 {
 	ssize_t rv;
 
diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h
index c1bb6a5ecf57..e5795aad0404 100644
--- a/fs/nfsd/state.h
+++ b/fs/nfsd/state.h
@@ -132,7 +132,7 @@ struct nfs4_delegation {
 	struct list_head	dl_recall_lru;  /* delegation recalled */
 	struct nfs4_clnt_odstate *dl_clnt_odstate;
 	u32			dl_type;
-	time_t			dl_time;
+	time64_t		dl_time;
 /* For recall: */
 	int			dl_retries;
 	struct nfsd4_callback	dl_recall;
@@ -310,7 +310,7 @@ struct nfs4_client {
 #endif
 	struct xdr_netobj	cl_name; 	/* id generated by client */
 	nfs4_verifier		cl_verifier; 	/* generated by client */
-	time_t                  cl_time;        /* time of last lease renewal */
+	time64_t		cl_time;	/* time of last lease renewal */
 	struct sockaddr_storage	cl_addr; 	/* client ipaddress */
 	bool			cl_mach_cred;	/* SP4_MACH_CRED in force */
 	struct svc_cred		cl_cred; 	/* setclientid principal */
@@ -448,7 +448,7 @@ struct nfs4_openowner {
 	 */
 	struct list_head	oo_close_lru;
 	struct nfs4_ol_stateid *oo_last_closed_stid;
-	time_t			oo_time; /* time of placement on so_close_lru */
+	time64_t		oo_time; /* time of placement on so_close_lru */
 #define NFS4_OO_CONFIRMED   1
 	unsigned char		oo_flags;
 };
@@ -605,7 +605,7 @@ static inline bool nfsd4_stateid_generation_after(stateid_t *a, stateid_t *b)
 struct nfsd4_blocked_lock {
 	struct list_head	nbl_list;
 	struct list_head	nbl_lru;
-	time_t			nbl_time;
+	time64_t		nbl_time;
 	struct file_lock	nbl_lock;
 	struct knfsd_fh		nbl_fh;
 	struct nfsd4_callback	nbl_cb;
-- 
2.20.0

[PATCH 18/19] nfsd: use ktime_get_real_seconds() in nfs4_verifier

[Arnd Bergmann]

gen_confirm() generates a unique identifier based on the current
time. This overflows in year 2038, but that is harmless since it
generally does not lead to duplicates, as long as the time has
been initialized by a real-time clock or NTP.

Using ktime_get_boottime_seconds() or ktime_get_seconds() would
avoid the overflow, but it would be more likely to result in
non-unique numbers.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 fs/nfsd/nfs4state.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 885a09b3a2c0..cb416b9f6536 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -2215,7 +2215,7 @@ static void gen_confirm(struct nfs4_client *clp, struct nfsd_net *nn)
 	 * This is opaque to client, so no need to byte-swap. Use
 	 * __force to keep sparse happy
 	 */
-	verf[0] = (__force __be32)get_seconds();
+	verf[0] = (__force __be32)(u32)ktime_get_real_seconds();
 	verf[1] = (__force __be32)nn->clverifier_counter++;
 	memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data));
 }
-- 
2.20.0

[PATCH 19/19] nfsd: remove nfs4_reset_lease() declarations

[Arnd Bergmann]

The function was removed a long time ago, but the declaration
and a dummy implementation are still there, referencing the
deprecated time_t type.

Remove both.

Fixes: f958a1320ff7 ("nfsd4: remove unnecessary lease-setting function")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 fs/nfsd/nfsd.h | 2 --
 1 file changed, 2 deletions(-)

diff --git a/fs/nfsd/nfsd.h b/fs/nfsd/nfsd.h
index af2947551e9c..e74979b5849e 100644
--- a/fs/nfsd/nfsd.h
+++ b/fs/nfsd/nfsd.h
@@ -142,7 +142,6 @@ int nfs4_state_start(void);
 int nfs4_state_start_net(struct net *net);
 void nfs4_state_shutdown(void);
 void nfs4_state_shutdown_net(struct net *net);
-void nfs4_reset_lease(time_t leasetime);
 int nfs4_reset_recoverydir(char *recdir);
 char * nfs4_recoverydir(void);
 bool nfsd4_spo_must_allow(struct svc_rqst *rqstp);
@@ -153,7 +152,6 @@ static inline int nfs4_state_start(void) { return 0; }
 static inline int nfs4_state_start_net(struct net *net) { return 0; }
 static inline void nfs4_state_shutdown(void) { }
 static inline void nfs4_state_shutdown_net(struct net *net) { }
-static inline void nfs4_reset_lease(time_t leasetime) { }
 static inline int nfs4_reset_recoverydir(char *recdir) { return 0; }
 static inline char * nfs4_recoverydir(void) {return NULL; }
 static inline bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
-- 
2.20.0

Re: [PATCH 01/19] sunrpc: convert to time64_t for expiry

[J. Bruce Fields]

On Mon, Nov 11, 2019 at 09:16:21PM +0100, Arnd Bergmann wrote:
> Using signed 32-bit types for UTC time leads to the y2038 overflow,
> which is what happens in the sunrpc code at the moment.
> 
> This changes the sunrpc code over to use time64_t where possible.
> The one exception is the gss_import_v{1,2}_context() function for
> kerberos5, which uses 32-bit timestamps in the protocol. Here,
> we can at least treat the numbers as 'unsigned', which extends the
> range from 2038 to 2106.

Looking at nfs-utils.... looks like this number is opaque to nfs-utils
code, generated by gss_inquire_context, which actually defines it as
uint32_t, so this makes sense.

--b.

> 
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> ---
>  include/linux/sunrpc/gss_api.h        |  4 ++--
>  include/linux/sunrpc/gss_krb5.h       |  2 +-
>  net/sunrpc/auth_gss/gss_krb5_mech.c   | 12 +++++++++---
>  net/sunrpc/auth_gss/gss_krb5_seal.c   |  8 ++++----
>  net/sunrpc/auth_gss/gss_krb5_unseal.c |  6 +++---
>  net/sunrpc/auth_gss/gss_krb5_wrap.c   | 16 ++++++++--------
>  net/sunrpc/auth_gss/gss_mech_switch.c |  2 +-
>  net/sunrpc/auth_gss/svcauth_gss.c     |  4 ++--
>  8 files changed, 30 insertions(+), 24 deletions(-)
> 
> diff --git a/include/linux/sunrpc/gss_api.h b/include/linux/sunrpc/gss_api.h
> index 5ac5db4d295f..68c871924ebf 100644
> --- a/include/linux/sunrpc/gss_api.h
> +++ b/include/linux/sunrpc/gss_api.h
> @@ -49,7 +49,7 @@ int gss_import_sec_context(
>  		size_t			bufsize,
>  		struct gss_api_mech	*mech,
>  		struct gss_ctx		**ctx_id,
> -		time_t			*endtime,
> +		time64_t		*endtime,
>  		gfp_t			gfp_mask);
>  u32 gss_get_mic(
>  		struct gss_ctx		*ctx_id,
> @@ -109,7 +109,7 @@ struct gss_api_ops {
>  			const void		*input_token,
>  			size_t			bufsize,
>  			struct gss_ctx		*ctx_id,
> -			time_t			*endtime,
> +			time64_t		*endtime,
>  			gfp_t			gfp_mask);
>  	u32 (*gss_get_mic)(
>  			struct gss_ctx		*ctx_id,
> diff --git a/include/linux/sunrpc/gss_krb5.h b/include/linux/sunrpc/gss_krb5.h
> index 02c0412e368c..c1d77dd8ed41 100644
> --- a/include/linux/sunrpc/gss_krb5.h
> +++ b/include/linux/sunrpc/gss_krb5.h
> @@ -106,9 +106,9 @@ struct krb5_ctx {
>  	struct crypto_sync_skcipher *initiator_enc_aux;
>  	u8			Ksess[GSS_KRB5_MAX_KEYLEN]; /* session key */
>  	u8			cksum[GSS_KRB5_MAX_KEYLEN];
> -	s32			endtime;
>  	atomic_t		seq_send;
>  	atomic64_t		seq_send64;
> +	time64_t		endtime;
>  	struct xdr_netobj	mech_used;
>  	u8			initiator_sign[GSS_KRB5_MAX_KEYLEN];
>  	u8			acceptor_sign[GSS_KRB5_MAX_KEYLEN];
> diff --git a/net/sunrpc/auth_gss/gss_krb5_mech.c b/net/sunrpc/auth_gss/gss_krb5_mech.c
> index 6e5d6d240215..75b3c2e9e8f8 100644
> --- a/net/sunrpc/auth_gss/gss_krb5_mech.c
> +++ b/net/sunrpc/auth_gss/gss_krb5_mech.c
> @@ -253,6 +253,7 @@ gss_import_v1_context(const void *p, const void *end, struct krb5_ctx *ctx)
>  {
>  	u32 seq_send;
>  	int tmp;
> +	u32 time32;
>  
>  	p = simple_get_bytes(p, end, &ctx->initiate, sizeof(ctx->initiate));
>  	if (IS_ERR(p))
> @@ -290,9 +291,11 @@ gss_import_v1_context(const void *p, const void *end, struct krb5_ctx *ctx)
>  		p = ERR_PTR(-ENOSYS);
>  		goto out_err;
>  	}
> -	p = simple_get_bytes(p, end, &ctx->endtime, sizeof(ctx->endtime));
> +	p = simple_get_bytes(p, end, &time32, sizeof(time32));
>  	if (IS_ERR(p))
>  		goto out_err;
> +	/* unsigned 32-bit time overflows in year 2106 */
> +	ctx->endtime = (time64_t)time32;
>  	p = simple_get_bytes(p, end, &seq_send, sizeof(seq_send));
>  	if (IS_ERR(p))
>  		goto out_err;
> @@ -587,15 +590,18 @@ gss_import_v2_context(const void *p, const void *end, struct krb5_ctx *ctx,
>  {
>  	u64 seq_send64;
>  	int keylen;
> +	u32 time32;
>  
>  	p = simple_get_bytes(p, end, &ctx->flags, sizeof(ctx->flags));
>  	if (IS_ERR(p))
>  		goto out_err;
>  	ctx->initiate = ctx->flags & KRB5_CTX_FLAG_INITIATOR;
>  
> -	p = simple_get_bytes(p, end, &ctx->endtime, sizeof(ctx->endtime));
> +	p = simple_get_bytes(p, end, &time32, sizeof(time32));
>  	if (IS_ERR(p))
>  		goto out_err;
> +	/* unsigned 32-bit time overflows in year 2106 */
> +	ctx->endtime = (time64_t)time32;
>  	p = simple_get_bytes(p, end, &seq_send64, sizeof(seq_send64));
>  	if (IS_ERR(p))
>  		goto out_err;
> @@ -659,7 +665,7 @@ gss_import_v2_context(const void *p, const void *end, struct krb5_ctx *ctx,
>  static int
>  gss_import_sec_context_kerberos(const void *p, size_t len,
>  				struct gss_ctx *ctx_id,
> -				time_t *endtime,
> +				time64_t *endtime,
>  				gfp_t gfp_mask)
>  {
>  	const void *end = (const void *)((const char *)p + len);
> diff --git a/net/sunrpc/auth_gss/gss_krb5_seal.c b/net/sunrpc/auth_gss/gss_krb5_seal.c
> index 48fe4a591b54..f1d280accf43 100644
> --- a/net/sunrpc/auth_gss/gss_krb5_seal.c
> +++ b/net/sunrpc/auth_gss/gss_krb5_seal.c
> @@ -131,14 +131,14 @@ gss_get_mic_v1(struct krb5_ctx *ctx, struct xdr_buf *text,
>  	struct xdr_netobj	md5cksum = {.len = sizeof(cksumdata),
>  					    .data = cksumdata};
>  	void			*ptr;
> -	s32			now;
> +	time64_t		now;
>  	u32			seq_send;
>  	u8			*cksumkey;
>  
>  	dprintk("RPC:       %s\n", __func__);
>  	BUG_ON(ctx == NULL);
>  
> -	now = get_seconds();
> +	now = ktime_get_real_seconds();
>  
>  	ptr = setup_token(ctx, token);
>  
> @@ -170,7 +170,7 @@ gss_get_mic_v2(struct krb5_ctx *ctx, struct xdr_buf *text,
>  	struct xdr_netobj cksumobj = { .len = sizeof(cksumdata),
>  				       .data = cksumdata};
>  	void *krb5_hdr;
> -	s32 now;
> +	time64_t now;
>  	u8 *cksumkey;
>  	unsigned int cksum_usage;
>  	__be64 seq_send_be64;
> @@ -198,7 +198,7 @@ gss_get_mic_v2(struct krb5_ctx *ctx, struct xdr_buf *text,
>  
>  	memcpy(krb5_hdr + GSS_KRB5_TOK_HDR_LEN, cksumobj.data, cksumobj.len);
>  
> -	now = get_seconds();
> +	now = ktime_get_real_seconds();
>  
>  	return (ctx->endtime < now) ? GSS_S_CONTEXT_EXPIRED : GSS_S_COMPLETE;
>  }
> diff --git a/net/sunrpc/auth_gss/gss_krb5_unseal.c b/net/sunrpc/auth_gss/gss_krb5_unseal.c
> index ef2b25b86d2f..aaab91cf24c8 100644
> --- a/net/sunrpc/auth_gss/gss_krb5_unseal.c
> +++ b/net/sunrpc/auth_gss/gss_krb5_unseal.c
> @@ -124,7 +124,7 @@ gss_verify_mic_v1(struct krb5_ctx *ctx,
>  
>  	/* it got through unscathed.  Make sure the context is unexpired */
>  
> -	now = get_seconds();
> +	now = ktime_get_real_seconds();
>  
>  	if (now > ctx->endtime)
>  		return GSS_S_CONTEXT_EXPIRED;
> @@ -149,7 +149,7 @@ gss_verify_mic_v2(struct krb5_ctx *ctx,
>  	char cksumdata[GSS_KRB5_MAX_CKSUM_LEN];
>  	struct xdr_netobj cksumobj = {.len = sizeof(cksumdata),
>  				      .data = cksumdata};
> -	s32 now;
> +	time64_t now;
>  	u8 *ptr = read_token->data;
>  	u8 *cksumkey;
>  	u8 flags;
> @@ -194,7 +194,7 @@ gss_verify_mic_v2(struct krb5_ctx *ctx,
>  		return GSS_S_BAD_SIG;
>  
>  	/* it got through unscathed.  Make sure the context is unexpired */
> -	now = get_seconds();
> +	now = ktime_get_real_seconds();
>  	if (now > ctx->endtime)
>  		return GSS_S_CONTEXT_EXPIRED;
>  
> diff --git a/net/sunrpc/auth_gss/gss_krb5_wrap.c b/net/sunrpc/auth_gss/gss_krb5_wrap.c
> index 14a0aff0cd84..6c1920eed771 100644
> --- a/net/sunrpc/auth_gss/gss_krb5_wrap.c
> +++ b/net/sunrpc/auth_gss/gss_krb5_wrap.c
> @@ -163,7 +163,7 @@ gss_wrap_kerberos_v1(struct krb5_ctx *kctx, int offset,
>  					    .data = cksumdata};
>  	int			blocksize = 0, plainlen;
>  	unsigned char		*ptr, *msg_start;
> -	s32			now;
> +	time64_t		now;
>  	int			headlen;
>  	struct page		**tmp_pages;
>  	u32			seq_send;
> @@ -172,7 +172,7 @@ gss_wrap_kerberos_v1(struct krb5_ctx *kctx, int offset,
>  
>  	dprintk("RPC:       %s\n", __func__);
>  
> -	now = get_seconds();
> +	now = ktime_get_real_seconds();
>  
>  	blocksize = crypto_sync_skcipher_blocksize(kctx->enc);
>  	gss_krb5_add_padding(buf, offset, blocksize);
> @@ -268,7 +268,7 @@ gss_unwrap_kerberos_v1(struct krb5_ctx *kctx, int offset, struct xdr_buf *buf)
>  	char			cksumdata[GSS_KRB5_MAX_CKSUM_LEN];
>  	struct xdr_netobj	md5cksum = {.len = sizeof(cksumdata),
>  					    .data = cksumdata};
> -	s32			now;
> +	time64_t		now;
>  	int			direction;
>  	s32			seqnum;
>  	unsigned char		*ptr;
> @@ -359,7 +359,7 @@ gss_unwrap_kerberos_v1(struct krb5_ctx *kctx, int offset, struct xdr_buf *buf)
>  
>  	/* it got through unscathed.  Make sure the context is unexpired */
>  
> -	now = get_seconds();
> +	now = ktime_get_real_seconds();
>  
>  	if (now > kctx->endtime)
>  		return GSS_S_CONTEXT_EXPIRED;
> @@ -439,7 +439,7 @@ gss_wrap_kerberos_v2(struct krb5_ctx *kctx, u32 offset,
>  		     struct xdr_buf *buf, struct page **pages)
>  {
>  	u8		*ptr, *plainhdr;
> -	s32		now;
> +	time64_t	now;
>  	u8		flags = 0x00;
>  	__be16		*be16ptr;
>  	__be64		*be64ptr;
> @@ -481,14 +481,14 @@ gss_wrap_kerberos_v2(struct krb5_ctx *kctx, u32 offset,
>  	if (err)
>  		return err;
>  
> -	now = get_seconds();
> +	now = ktime_get_real_seconds();
>  	return (kctx->endtime < now) ? GSS_S_CONTEXT_EXPIRED : GSS_S_COMPLETE;
>  }
>  
>  static u32
>  gss_unwrap_kerberos_v2(struct krb5_ctx *kctx, int offset, struct xdr_buf *buf)
>  {
> -	s32		now;
> +	time64_t	now;
>  	u8		*ptr;
>  	u8		flags = 0x00;
>  	u16		ec, rrc;
> @@ -557,7 +557,7 @@ gss_unwrap_kerberos_v2(struct krb5_ctx *kctx, int offset, struct xdr_buf *buf)
>  	/* do sequencing checks */
>  
>  	/* it got through unscathed.  Make sure the context is unexpired */
> -	now = get_seconds();
> +	now = ktime_get_real_seconds();
>  	if (now > kctx->endtime)
>  		return GSS_S_CONTEXT_EXPIRED;
>  
> diff --git a/net/sunrpc/auth_gss/gss_mech_switch.c b/net/sunrpc/auth_gss/gss_mech_switch.c
> index 82060099a429..94fddce7f224 100644
> --- a/net/sunrpc/auth_gss/gss_mech_switch.c
> +++ b/net/sunrpc/auth_gss/gss_mech_switch.c
> @@ -374,7 +374,7 @@ int
>  gss_import_sec_context(const void *input_token, size_t bufsize,
>  		       struct gss_api_mech	*mech,
>  		       struct gss_ctx		**ctx_id,
> -		       time_t			*endtime,
> +		       time64_t			*endtime,
>  		       gfp_t gfp_mask)
>  {
>  	if (!(*ctx_id = kzalloc(sizeof(**ctx_id), gfp_mask)))
> diff --git a/net/sunrpc/auth_gss/svcauth_gss.c b/net/sunrpc/auth_gss/svcauth_gss.c
> index 8be2f209982b..30ed5585a42a 100644
> --- a/net/sunrpc/auth_gss/svcauth_gss.c
> +++ b/net/sunrpc/auth_gss/svcauth_gss.c
> @@ -433,7 +433,7 @@ static int rsc_parse(struct cache_detail *cd,
>  	int id;
>  	int len, rv;
>  	struct rsc rsci, *rscp = NULL;
> -	time_t expiry;
> +	time64_t expiry;
>  	int status = -EINVAL;
>  	struct gss_api_mech *gm = NULL;
>  
> @@ -1184,7 +1184,7 @@ static int gss_proxy_save_rsc(struct cache_detail *cd,
>  	static atomic64_t ctxhctr;
>  	long long ctxh;
>  	struct gss_api_mech *gm = NULL;
> -	time_t expiry;
> +	time64_t expiry;
>  	int status = -EINVAL;
>  
>  	memset(&rsci, 0, sizeof(rsci));
> -- 
> 2.20.0