Update Linux to v5.4.2
Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/md/md.h b/drivers/md/md.h
index 8afd6bf..c5e3ff3 100644
--- a/drivers/md/md.h
+++ b/drivers/md/md.h
@@ -1,15 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
md.h : kernel internal structure of the Linux MD driver
Copyright (C) 1996-98 Ingo Molnar, Gadi Oxman
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
-
- You should have received a copy of the GNU General Public License
- (for example /usr/src/linux/COPYING); if not, write to the Free
- Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef _MD_MD_H
@@ -116,6 +109,14 @@
* for reporting to userspace and storing
* in superblock.
*/
+
+ /*
+ * The members for check collision of write behind IOs.
+ */
+ struct list_head wb_list;
+ spinlock_t wb_list_lock;
+ wait_queue_head_t wb_io_wait;
+
struct work_struct del_work; /* used for delayed sysfs removal */
struct kernfs_node *sysfs_state; /* handle for 'state'
@@ -200,6 +201,10 @@
* it didn't fail, so don't use FailFast
* any more for metadata
*/
+ WBCollisionCheck, /*
+ * multiqueue device should check if there
+ * is collision between write behind bios.
+ */
};
static inline int is_badblock(struct md_rdev *rdev, sector_t s, int sectors,
@@ -243,6 +248,12 @@
MD_UPDATING_SB, /* md_check_recovery is updating the metadata
* without explicitly holding reconfig_mutex.
*/
+ MD_NOT_READY, /* do_md_run() is active, so 'array_state'
+ * must not report that array is ready yet
+ */
+ MD_BROKEN, /* This is used in RAID-0/LINEAR only, to stop
+ * I/O in case an array member is gone/failed.
+ */
};
enum mddev_sb_flags {
@@ -252,17 +263,12 @@
MD_SB_NEED_REWRITE, /* metadata write needs to be repeated */
};
-#define NR_FLUSH_INFOS 8
-#define NR_FLUSH_BIOS 64
-struct flush_info {
- struct bio *bio;
- struct mddev *mddev;
- struct work_struct flush_work;
- atomic_t flush_pending;
-};
-struct flush_bio {
- struct flush_info *fi;
- struct md_rdev *rdev;
+#define NR_WB_INFOS 8
+/* record current range of write behind IOs */
+struct wb_info {
+ sector_t lo;
+ sector_t hi;
+ struct list_head list;
};
struct mddev {
@@ -470,14 +476,24 @@
* metadata and bitmap writes
*/
- mempool_t *flush_pool;
- mempool_t *flush_bio_pool;
+ /* Generic flush handling.
+ * The last to finish preflush schedules a worker to submit
+ * the rest of the request (without the REQ_PREFLUSH flag).
+ */
+ struct bio *flush_bio;
+ atomic_t flush_pending;
+ ktime_t start_flush, last_flush; /* last_flush is when the last completed
+ * flush was started.
+ */
+ struct work_struct flush_work;
struct work_struct event_work; /* used by dm to report failure event */
+ mempool_t *wb_info_pool;
void (*sync_super)(struct mddev *mddev, struct md_rdev *rdev);
struct md_cluster_info *cluster_info;
unsigned int good_device_nr; /* good device num within cluster raid */
bool has_superblocks:1;
+ bool fail_last_dev:1;
};
enum recovery_flags {
@@ -557,6 +573,7 @@
int (*check_reshape) (struct mddev *mddev);
int (*start_reshape) (struct mddev *mddev);
void (*finish_reshape) (struct mddev *mddev);
+ void (*update_reshape_pos) (struct mddev *mddev);
/* quiesce suspends or resumes internal processing.
* 1 - stop new actions and wait for action io to complete
* 0 - return to normal behaviour
@@ -720,9 +737,24 @@
extern void md_reload_sb(struct mddev *mddev, int raid_disk);
extern void md_update_sb(struct mddev *mddev, int force);
extern void md_kick_rdev_from_array(struct md_rdev * rdev);
+extern void mddev_create_wb_pool(struct mddev *mddev, struct md_rdev *rdev,
+ bool is_suspend);
struct md_rdev *md_find_rdev_nr_rcu(struct mddev *mddev, int nr);
struct md_rdev *md_find_rdev_rcu(struct mddev *mddev, dev_t dev);
+static inline bool is_mddev_broken(struct md_rdev *rdev, const char *md_type)
+{
+ int flags = rdev->bdev->bd_disk->flags;
+
+ if (!(flags & GENHD_FL_UP)) {
+ if (!test_and_set_bit(MD_BROKEN, &rdev->mddev->flags))
+ pr_warn("md: %s: %s array has a missing/failed member\n",
+ mdname(rdev->mddev), md_type);
+ return true;
+ }
+ return false;
+}
+
static inline void rdev_dec_pending(struct md_rdev *rdev, struct mddev *mddev)
{
int faulty = test_bit(Faulty, &rdev->flags);