Re: [PATCH] md: generate CHANGE uevents for md device
From: Song Liu <song@kernel.org>
Date: 2022-09-09 14:49:56
On Wed, Sep 7, 2022 at 2:38 PM Mateusz Grzonka [off-list ref] wrote:
Due to changes in mdadm event handling and moving to udev based approach [1], more CHANGE uevents need to be added. Generate CHANGE uevents to give a udev based software (e.g. mdmonitor) chance to see changes in case of any array reconfiguration. Add emitting a new CHANGE uevent into md_new_event() to keep consistency with currently used mdstat based approach. [1] https://lore.kernel.org/linux-raid/20220907125657.12192-1-mateusz.grzonka@intel.com/ (local) Signed-off-by: Mateusz Grzonka <redacted>
This doesn't apply cleanly on top of md-next. Could you please rebase and resend? Thanks, Song
quoted hunk ↗ jump to hunk
--- drivers/md/md.c | 31 ++++++++++++++++--------------- drivers/md/md.h | 2 +- drivers/md/raid10.c | 2 +- drivers/md/raid5.c | 2 +- 4 files changed, 19 insertions(+), 18 deletions(-)diff --git a/drivers/md/md.c b/drivers/md/md.c index 8273ac5eef06..50587938fddd 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c@@ -354,10 +354,11 @@ static bool create_on_open = true; */ static DECLARE_WAIT_QUEUE_HEAD(md_event_waiters); static atomic_t md_event_count; -void md_new_event(void) +void md_new_event(struct mddev *mddev) { atomic_inc(&md_event_count); wake_up(&md_event_waiters); + kobject_uevent(&disk_to_dev(mddev->gendisk)->kobj, KOBJ_CHANGE); } EXPORT_SYMBOL_GPL(md_new_event);@@ -2878,7 +2879,7 @@ static int add_bound_rdev(struct md_rdev *rdev) if (mddev->degraded) set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); - md_new_event(); + md_new_event(mddev); md_wakeup_thread(mddev->thread); return 0; }@@ -2998,7 +2999,7 @@ state_store(struct md_rdev *rdev, const char *buf, size_t len) set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); md_wakeup_thread(mddev->thread); } - md_new_event(); + md_new_event(mddev); } } } else if (cmd_match(buf, "writemostly")) {@@ -4100,7 +4101,7 @@ level_store(struct mddev *mddev, const char *buf, size_t len) if (!mddev->thread) md_update_sb(mddev, 1); sysfs_notify_dirent_safe(mddev->sysfs_level); - md_new_event(); + md_new_event(mddev); rv = len; out_unlock: mddev_unlock(mddev);@@ -4620,7 +4621,7 @@ new_dev_store(struct mddev *mddev, const char *buf, size_t len) export_rdev(rdev); mddev_unlock(mddev); if (!err) - md_new_event(); + md_new_event(mddev); return err ? err : len; }@@ -6031,7 +6032,7 @@ int md_run(struct mddev *mddev) if (mddev->sb_flags) md_update_sb(mddev, 0); - md_new_event(); + md_new_event(mddev); return 0; bitmap_abort:@@ -6417,7 +6418,7 @@ static int do_md_stop(struct mddev *mddev, int mode, if (mddev->hold_active == UNTIL_STOP) mddev->hold_active = 0; } - md_new_event(); + md_new_event(mddev); sysfs_notify_dirent_safe(mddev->sysfs_state); return 0; }@@ -6917,7 +6918,7 @@ static int hot_remove_disk(struct mddev *mddev, dev_t dev) md_wakeup_thread(mddev->thread); else md_update_sb(mddev, 1); - md_new_event(); + md_new_event(mddev); return 0; busy:@@ -6998,7 +6999,7 @@ static int hot_add_disk(struct mddev *mddev, dev_t dev) */ set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); md_wakeup_thread(mddev->thread); - md_new_event(); + md_new_event(mddev); return 0; abort_export:@@ -7980,7 +7981,7 @@ void md_error(struct mddev *mddev, struct md_rdev *rdev) } if (mddev->event_work.func) queue_work(md_misc_wq, &mddev->event_work); - md_new_event(); + md_new_event(mddev); } EXPORT_SYMBOL(md_error);@@ -8879,7 +8880,7 @@ void md_do_sync(struct md_thread *thread) mddev->curr_resync = 3; /* no longer delayed */ mddev->curr_resync_completed = j; sysfs_notify_dirent_safe(mddev->sysfs_completed); - md_new_event(); + md_new_event(mddev); update_time = jiffies; blk_start_plug(&plug);@@ -8950,7 +8951,7 @@ void md_do_sync(struct md_thread *thread) /* this is the earliest that rebuild will be * visible in /proc/mdstat */ - md_new_event(); + md_new_event(mddev); if (last_check + window > io_sectors || j == max_sectors) continue;@@ -9174,7 +9175,7 @@ static int remove_and_add_spares(struct mddev *mddev, sysfs_link_rdev(mddev, rdev); if (!test_bit(Journal, &rdev->flags)) spares++; - md_new_event(); + md_new_event(mddev); set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); } }@@ -9208,7 +9209,7 @@ static void md_start_sync(struct work_struct *ws) } else md_wakeup_thread(mddev->sync_thread); sysfs_notify_dirent_safe(mddev->sysfs_action); - md_new_event(); + md_new_event(mddev); } /*@@ -9471,7 +9472,7 @@ void md_reap_sync_thread(struct mddev *mddev, bool reconfig_mutex_held) /* flag recovery needed just to double check */ set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); sysfs_notify_dirent_safe(mddev->sysfs_action); - md_new_event(); + md_new_event(mddev); if (mddev->event_work.func) queue_work(md_misc_wq, &mddev->event_work); }diff --git a/drivers/md/md.h b/drivers/md/md.h index 5f62c46ac2d3..eb401835d29c 100644 --- a/drivers/md/md.h +++ b/drivers/md/md.h@@ -741,7 +741,7 @@ extern int sync_page_io(struct md_rdev *rdev, sector_t sector, int size, struct page *page, int op, int op_flags, bool metadata_op); extern void md_do_sync(struct md_thread *thread); -extern void md_new_event(void); +extern void md_new_event(struct mddev *mddev); extern void md_allow_write(struct mddev *mddev); extern void md_wait_for_blocked_rdev(struct md_rdev *rdev, struct mddev *mddev); extern void md_set_array_sectors(struct mddev *mddev, sector_t array_sectors);diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c index d589f823feb1..4dbf1fff8852 100644 --- a/drivers/md/raid10.c +++ b/drivers/md/raid10.c@@ -4653,7 +4653,7 @@ static int raid10_start_reshape(struct mddev *mddev) } conf->reshape_checkpoint = jiffies; md_wakeup_thread(mddev->sync_thread); - md_new_event(); + md_new_event(mddev); return 0; abort:diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index 5d09256d7f81..7fafb5bcf3db 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c@@ -8335,7 +8335,7 @@ static int raid5_start_reshape(struct mddev *mddev) } conf->reshape_checkpoint = jiffies; md_wakeup_thread(mddev->sync_thread); - md_new_event(); + md_new_event(mddev); return 0; } --2.26.2