Merge branch 'vfs_timespec64' of https://github.com/deepa-hub/vfs into vfs-timespec64

Pull the timespec64 conversion from Deepa Dinamani:
 "The series aims to switch vfs timestamps to use
  struct timespec64. Currently vfs uses struct timespec,
  which is not y2038 safe.

  The flag patch applies cleanly. I've not seen the timestamps
  update logic change often. The series applies cleanly on 4.17-rc6
  and linux-next tip (top commit: next-20180517).

  I'm not sure how to merge this kind of a series with a flag patch.
  We are targeting 4.18 for this.
  Let me know if you have other suggestions.

  The series involves the following:
  1. Add vfs helper functions for supporting struct timepec64 timestamps.
  2. Cast prints of vfs timestamps to avoid warnings after the switch.
  3. Simplify code using vfs timestamps so that the actual
     replacement becomes easy.
  4. Convert vfs timestamps to use struct timespec64 using a script.
     This is a flag day patch.

  I've tried to keep the conversions with the script simple, to
  aid in the reviews. I've kept all the internal filesystem data
  structures and function signatures the same.

  Next steps:
  1. Convert APIs that can handle timespec64, instead of converting
     timestamps at the boundaries.
  2. Update internal data structures to avoid timestamp conversions."

I've pulled it into a branch based on top of the NFS changes that
are now in mainline, so I could resolve the non-obvious conflict
between the two while merging.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

8 files changed, 47 insertions, 33 deletions

diff --git a/drivers/firmware/efi/efi-pstore.c b/drivers/firmware/efi/efi-pstore.c
index 5a0fa939d70f..cfe87b465819 100644
--- a/drivers/firmware/efi/efi-pstore.c
+++ b/drivers/firmware/efi/efi-pstore.c
@@ -28,10 +28,9 @@ static int efi_pstore_close(struct pstore_info *psi)
 	return 0;
 }
 
-static inline u64 generic_id(unsigned long timestamp,
-			     unsigned int part, int count)
+static inline u64 generic_id(u64 timestamp, unsigned int part, int count)
 {
-	return ((u64) timestamp * 100 + part) * 1000 + count;
+	return (timestamp * 100 + part) * 1000 + count;
 }
 
 static int efi_pstore_read_func(struct efivar_entry *entry,
@@ -42,7 +41,8 @@ static int efi_pstore_read_func(struct efivar_entry *entry,
 	int i;
 	int cnt;
 	unsigned int part;
-	unsigned long time, size;
+	unsigned long size;
+	u64 time;
 
 	if (efi_guidcmp(entry->var.VendorGuid, vendor))
 		return 0;
@@ -50,7 +50,7 @@ static int efi_pstore_read_func(struct efivar_entry *entry,
 	for (i = 0; i < DUMP_NAME_LEN; i++)
 		name[i] = entry->var.VariableName[i];
 
-	if (sscanf(name, "dump-type%u-%u-%d-%lu-%c",
+	if (sscanf(name, "dump-type%u-%u-%d-%llu-%c",
 		   &record->type, &part, &cnt, &time, &data_type) == 5) {
 		record->id = generic_id(time, part, cnt);
 		record->part = part;
@@ -62,7 +62,7 @@ static int efi_pstore_read_func(struct efivar_entry *entry,
 		else
 			record->compressed = false;
 		record->ecc_notice_size = 0;
-	} else if (sscanf(name, "dump-type%u-%u-%d-%lu",
+	} else if (sscanf(name, "dump-type%u-%u-%d-%llu",
 		   &record->type, &part, &cnt, &time) == 4) {
 		record->id = generic_id(time, part, cnt);
 		record->part = part;
@@ -71,7 +71,7 @@ static int efi_pstore_read_func(struct efivar_entry *entry,
 		record->time.tv_nsec = 0;
 		record->compressed = false;
 		record->ecc_notice_size = 0;
-	} else if (sscanf(name, "dump-type%u-%u-%lu",
+	} else if (sscanf(name, "dump-type%u-%u-%llu",
 			  &record->type, &part, &time) == 3) {
 		/*
 		 * Check if an old format,
@@ -250,9 +250,10 @@ static int efi_pstore_write(struct pstore_record *record)
 	/* Since we copy the entire length of name, make sure it is wiped. */
 	memset(name, 0, sizeof(name));
 
-	snprintf(name, sizeof(name), "dump-type%u-%u-%d-%lu-%c",
+	snprintf(name, sizeof(name), "dump-type%u-%u-%d-%lld-%c",
 		 record->type, record->part, record->count,
-		 record->time.tv_sec, record->compressed ? 'C' : 'D');
+		 (long long)record->time.tv_sec,
+		 record->compressed ? 'C' : 'D');
 
 	for (i = 0; i < DUMP_NAME_LEN; i++)
 		efi_name[i] = name[i];
@@ -327,15 +328,15 @@ static int efi_pstore_erase(struct pstore_record *record)
 	char name[DUMP_NAME_LEN];
 	int ret;
 
-	snprintf(name, sizeof(name), "dump-type%u-%u-%d-%lu",
+	snprintf(name, sizeof(name), "dump-type%u-%u-%d-%lld",
 		 record->type, record->part, record->count,
-		 record->time.tv_sec);
+		 (long long)record->time.tv_sec);
 	ret = efi_pstore_erase_name(name);
 	if (ret != -ENOENT)
 		return ret;
 
-	snprintf(name, sizeof(name), "dump-type%u-%u-%lu",
-		record->type, record->part, record->time.tv_sec);
+	snprintf(name, sizeof(name), "dump-type%u-%u-%lld",
+		record->type, record->part, (long long)record->time.tv_sec);
 	ret = efi_pstore_erase_name(name);
 
 	return ret;
diff --git a/drivers/staging/lustre/lustre/llite/llite_lib.c b/drivers/staging/lustre/lustre/llite/llite_lib.c
index e7500c53fafc..9162c557591c 100644
--- a/drivers/staging/lustre/lustre/llite/llite_lib.c
+++ b/drivers/staging/lustre/lustre/llite/llite_lib.c
@@ -1482,8 +1482,9 @@ int ll_setattr_raw(struct dentry *dentry, struct iattr *attr, bool hsm_import)
 	}
 
 	if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
-		CDEBUG(D_INODE, "setting mtime %lu, ctime %lu, now = %llu\n",
-		       LTIME_S(attr->ia_mtime), LTIME_S(attr->ia_ctime),
+		CDEBUG(D_INODE, "setting mtime %llu, ctime %llu, now = %llu\n",
+		       (unsigned long long)LTIME_S(attr->ia_mtime),
+		       (unsigned long long)LTIME_S(attr->ia_ctime),
 		       (s64)ktime_get_real_seconds());
 
 	if (S_ISREG(inode->i_mode))
@@ -1760,9 +1761,10 @@ int ll_update_inode(struct inode *inode, struct lustre_md *md)
 	if (body->mbo_valid & OBD_MD_FLMTIME) {
 		if (body->mbo_mtime > LTIME_S(inode->i_mtime)) {
 			CDEBUG(D_INODE,
-			       "setting ino %lu mtime from %lu to %llu\n",
-			       inode->i_ino, LTIME_S(inode->i_mtime),
-			       body->mbo_mtime);
+			       "setting ino %lu mtime from %llu to %llu\n",
+			       inode->i_ino,
+			       (unsigned long long)LTIME_S(inode->i_mtime),
+			       (unsigned long long)body->mbo_mtime);
 			LTIME_S(inode->i_mtime) = body->mbo_mtime;
 		}
 		lli->lli_mtime = body->mbo_mtime;
diff --git a/drivers/staging/lustre/lustre/llite/namei.c b/drivers/staging/lustre/lustre/llite/namei.c
index 6c9ec462eb41..c5380c770788 100644
--- a/drivers/staging/lustre/lustre/llite/namei.c
+++ b/drivers/staging/lustre/lustre/llite/namei.c
@@ -844,8 +844,9 @@ void ll_update_times(struct ptlrpc_request *request, struct inode *inode)
 	LASSERT(body);
 	if (body->mbo_valid & OBD_MD_FLMTIME &&
 	    body->mbo_mtime > LTIME_S(inode->i_mtime)) {
-		CDEBUG(D_INODE, "setting fid " DFID " mtime from %lu to %llu\n",
-		       PFID(ll_inode2fid(inode)), LTIME_S(inode->i_mtime),
+		CDEBUG(D_INODE, "setting fid " DFID " mtime from %llu to %llu\n",
+		       PFID(ll_inode2fid(inode)),
+		       (unsigned long long)LTIME_S(inode->i_mtime),
 		       body->mbo_mtime);
 		LTIME_S(inode->i_mtime) = body->mbo_mtime;
 	}
diff --git a/drivers/staging/lustre/lustre/lmv/lmv_obd.c b/drivers/staging/lustre/lustre/lmv/lmv_obd.c
index e8a9b9902c37..57003be8f4d2 100644
--- a/drivers/staging/lustre/lustre/lmv/lmv_obd.c
+++ b/drivers/staging/lustre/lustre/lmv/lmv_obd.c
@@ -3031,11 +3031,12 @@ static int lmv_merge_attr(struct obd_export *exp,
 	for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
 		struct inode *inode = lsm->lsm_md_oinfo[i].lmo_root;
 
-		CDEBUG(D_INFO, "" DFID " size %llu, blocks %llu nlink %u, atime %lu ctime %lu, mtime %lu.\n",
+		CDEBUG(D_INFO, "" DFID " size %llu, blocks %llu nlink %u, atime %llu ctime %llu, mtime %llu.\n",
 		       PFID(&lsm->lsm_md_oinfo[i].lmo_fid),
 		       i_size_read(inode), (unsigned long long)inode->i_blocks,
-		       inode->i_nlink, LTIME_S(inode->i_atime),
-		       LTIME_S(inode->i_ctime), LTIME_S(inode->i_mtime));
+		       inode->i_nlink, (unsigned long long)LTIME_S(inode->i_atime),
+		       (unsigned long long)LTIME_S(inode->i_ctime),
+		       (unsigned long long)LTIME_S(inode->i_mtime));
 
 		/* for slave stripe, it needs to subtract nlink for . and .. */
 		if (i)
diff --git a/drivers/staging/lustre/lustre/mdc/mdc_reint.c b/drivers/staging/lustre/lustre/mdc/mdc_reint.c
index 488b98007558..f1ccf8d26ddc 100644
--- a/drivers/staging/lustre/lustre/mdc/mdc_reint.c
+++ b/drivers/staging/lustre/lustre/mdc/mdc_reint.c
@@ -129,9 +129,9 @@ int mdc_setattr(struct obd_export *exp, struct md_op_data *op_data,
 	}
 
 	if (op_data->op_attr.ia_valid & (ATTR_MTIME | ATTR_CTIME))
-		CDEBUG(D_INODE, "setting mtime %ld, ctime %ld\n",
-		       LTIME_S(op_data->op_attr.ia_mtime),
-		       LTIME_S(op_data->op_attr.ia_ctime));
+		CDEBUG(D_INODE, "setting mtime %lld, ctime %lld\n",
+		       (long long)LTIME_S(op_data->op_attr.ia_mtime),
+		       (long long)LTIME_S(op_data->op_attr.ia_ctime));
 	mdc_setattr_pack(req, op_data, ea, ealen);
 
 	ptlrpc_request_set_replen(req);
diff --git a/drivers/staging/lustre/lustre/obdclass/obdo.c b/drivers/staging/lustre/lustre/obdclass/obdo.c
index c4503bc36591..8f4054aa970b 100644
--- a/drivers/staging/lustre/lustre/obdclass/obdo.c
+++ b/drivers/staging/lustre/lustre/obdclass/obdo.c
@@ -60,9 +60,9 @@ void obdo_from_inode(struct obdo *dst, struct inode *src, u32 valid)
 	u32 newvalid = 0;
 
 	if (valid & (OBD_MD_FLCTIME | OBD_MD_FLMTIME))
-		CDEBUG(D_INODE, "valid %x, new time %lu/%lu\n",
-		       valid, LTIME_S(src->i_mtime),
-		       LTIME_S(src->i_ctime));
+		CDEBUG(D_INODE, "valid %x, new time %llu/%llu\n",
+		       valid, (long long)LTIME_S(src->i_mtime),
+		       (long long)LTIME_S(src->i_ctime));
 
 	if (valid & OBD_MD_FLATIME) {
 		dst->o_atime = LTIME_S(src->i_atime);
diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index 7c838b90a31d..aba59521ad48 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -867,8 +867,13 @@ static ssize_t tty_read(struct file *file, char __user *buf, size_t count,
 		i = -EIO;
 	tty_ldisc_deref(ld);
 
-	if (i > 0)
-		tty_update_time(&inode->i_atime);
+	if (i > 0) {
+		struct timespec ts;
+
+		ts = timespec64_to_timespec(inode->i_atime);
+		tty_update_time(&ts);
+		inode->i_atime = timespec_to_timespec64(ts);
+	}
 
 	return i;
 }
@@ -969,7 +974,11 @@ static inline ssize_t do_tty_write(
 		cond_resched();
 	}
 	if (written) {
-		tty_update_time(&file_inode(file)->i_mtime);
+		struct timespec ts;
+
+		ts = timespec64_to_timespec(file_inode(file)->i_mtime);
+		tty_update_time(&ts);
+		file_inode(file)->i_mtime = timespec_to_timespec64(ts);
 		ret = written;
 	}
 out:
diff --git a/drivers/usb/gadget/function/f_fs.c b/drivers/usb/gadget/function/f_fs.c
index 0294e4f18873..d8a532fb935d 100644
--- a/drivers/usb/gadget/function/f_fs.c
+++ b/drivers/usb/gadget/function/f_fs.c
@@ -1297,7 +1297,7 @@ ffs_sb_make_inode(struct super_block *sb, void *data,
 	inode = new_inode(sb);
 
 	if (likely(inode)) {
-		struct timespec ts = current_time(inode);
+		struct timespec64 ts = current_time(inode);
 
 		inode->i_ino	 = get_next_ino();
 		inode->i_mode    = perms->mode;