Commit 431e6125 authored by Yu Kuai's avatar Yu Kuai Committed by Song Liu
Browse files

md: export md_is_rdwr() and is_md_suspended() 



The two apis will be used later to fix a deadlock in raid456, there are
no functional changes.

Signed-off-by: default avatarYu Kuai <yukuai3@huawei.com>
Signed-off-by: default avatarSong Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20230512015610.821290-4-yukuai1@huaweicloud.com
parent 873f50ec

drivers/md/md.c

+0 −16
Original line number Diff line number Diff line
@@ -93,18 +93,6 @@ static int remove_and_add_spares(struct mddev *mddev, 
				 struct md_rdev *this);

static void mddev_detach(struct mddev *mddev);



enum md_ro_state {

	MD_RDWR,

	MD_RDONLY,

	MD_AUTO_READ,

	MD_MAX_STATE

};



static bool md_is_rdwr(struct mddev *mddev)

{

	return (mddev->ro == MD_RDWR);

}



/*

 * Default number of read corrections we'll attempt on an rdev

 * before ejecting it from the array. We divide the read error
@@ -360,10 +348,6 @@ EXPORT_SYMBOL_GPL(md_new_event); 
static LIST_HEAD(all_mddevs);

static DEFINE_SPINLOCK(all_mddevs_lock);



static bool is_md_suspended(struct mddev *mddev)

{

	return percpu_ref_is_dying(&mddev->active_io);

}

/* Rather than calling directly into the personality make_request function,

 * IO requests come here first so that we can check if the device is

 * being suspended pending a reconfiguration.

drivers/md/md.h

+17 −0
Original line number Diff line number Diff line
@@ -555,6 +555,23 @@ enum recovery_flags { 
	MD_RESYNCING_REMOTE,	/* remote node is running resync thread */

};



enum md_ro_state {

	MD_RDWR,

	MD_RDONLY,

	MD_AUTO_READ,

	MD_MAX_STATE

};



static inline bool md_is_rdwr(struct mddev *mddev)

{

	return (mddev->ro == MD_RDWR);

}



static inline bool is_md_suspended(struct mddev *mddev)

{

	return percpu_ref_is_dying(&mddev->active_io);

}



static inline int __must_check mddev_lock(struct mddev *mddev)

{

	return mutex_lock_interruptible(&mddev->reconfig_mutex);