[PATCH 8/8] block: remove GENHD_FL_UP
From: Christoph Hellwig <hch@lst.de>
Date: 2021-08-09 06:49:57
Also in:
linux-bcache, linux-mmc, linux-nvme, linux-raid
Subsystem:
block layer, filesystems (vfs and infrastructure), nvm express driver, software raid (multiple disks) support, the rest · Maintainers:
Jens Axboe, Alexander Viro, Christian Brauner, Keith Busch, Christoph Hellwig, Sagi Grimberg, Song Liu, Yu Kuai, Linus Torvalds
Just check inode_unhashed on the whole device bdev inode instead, and provide a helper to check for that information. Signed-off-by: Christoph Hellwig <hch@lst.de> --- block/genhd.c | 6 ++---- block/partitions/core.c | 4 ++-- drivers/md/md.h | 4 +--- drivers/nvme/host/core.c | 2 +- fs/block_dev.c | 2 +- include/linux/genhd.h | 9 +++++---- 6 files changed, 12 insertions(+), 15 deletions(-)
diff --git a/block/genhd.c b/block/genhd.c
index a4817e42f3a3..9021c8ce3869 100644
--- a/block/genhd.c
+++ b/block/genhd.c@@ -77,7 +77,8 @@ bool set_capacity_and_notify(struct gendisk *disk, sector_t size) * initial capacity during probing. */ if (size == capacity || - (disk->flags & (GENHD_FL_UP | GENHD_FL_HIDDEN)) != GENHD_FL_UP) + !disk_live(disk) || + (disk->flags & GENHD_FL_HIDDEN)) return false; pr_info("%s: detected capacity change from %lld to %lld\n",
@@ -519,8 +520,6 @@ static void __device_add_disk(struct device *parent, struct gendisk *disk, disk->flags |= GENHD_FL_EXT_DEVT; } - disk->flags |= GENHD_FL_UP; - disk_alloc_events(disk); if (disk->flags & GENHD_FL_HIDDEN) {
@@ -604,7 +603,6 @@ void del_gendisk(struct gendisk *disk) mutex_lock(&disk->open_mutex); remove_inode_hash(disk->part0->bd_inode); - disk->flags &= ~GENHD_FL_UP; blk_drop_partitions(disk); mutex_unlock(&disk->open_mutex);
diff --git a/block/partitions/core.c b/block/partitions/core.c
index fb3a556cacce..c6738ccbcee5 100644
--- a/block/partitions/core.c
+++ b/block/partitions/core.c@@ -459,7 +459,7 @@ int bdev_add_partition(struct block_device *bdev, int partno, int ret; mutex_lock(&disk->open_mutex); - if (!(disk->flags & GENHD_FL_UP)) { + if (!disk_live(disk)) { ret = -ENXIO; goto out; }
@@ -669,7 +669,7 @@ int bdev_disk_changed(struct gendisk *disk, bool invalidate) lockdep_assert_held(&disk->open_mutex); - if (!(disk->flags & GENHD_FL_UP)) + if (!disk_live(disk)) return -ENXIO; rescan:
diff --git a/drivers/md/md.h b/drivers/md/md.h
index 832547cf038f..4c96c36bd01a 100644
--- a/drivers/md/md.h
+++ b/drivers/md/md.h@@ -764,9 +764,7 @@ 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 (!disk_live(rdev->bdev->bd_disk)) { 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);
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index e24a0143fd87..cb12d8b94e82 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c@@ -1822,7 +1822,7 @@ static void nvme_update_disk_info(struct gendisk *disk, static inline bool nvme_first_scan(struct gendisk *disk) { /* nvme_alloc_ns() scans the disk prior to adding it */ - return !(disk->flags & GENHD_FL_UP); + return !disk_live(disk); } static void nvme_set_chunk_sectors(struct nvme_ns *ns, struct nvme_id_ns *id)
diff --git a/fs/block_dev.c b/fs/block_dev.c
index 6658f40ae492..ab50428b328b 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c@@ -1374,7 +1374,7 @@ struct block_device *blkdev_get_by_dev(dev_t dev, fmode_t mode, void *holder) mutex_lock(&disk->open_mutex); ret = -ENXIO; - if (!(disk->flags & GENHD_FL_UP)) + if (!disk_live(disk)) goto abort_claiming; if (bdev_is_partition(bdev)) ret = blkdev_get_part(bdev, mode);
diff --git a/include/linux/genhd.h b/include/linux/genhd.h
index 849486de81c6..ddd02def1ed4 100644
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h@@ -60,9 +60,6 @@ struct partition_meta_info { * device. * Affects responses to the ``CDROM_GET_CAPABILITY`` ioctl. * - * ``GENHD_FL_UP`` (0x0010): indicates that the block device is "up", - * with a similar meaning to network interfaces. - * * ``GENHD_FL_SUPPRESS_PARTITION_INFO`` (0x0020): don't include * partition information in ``/proc/partitions`` or in the output of * printk_all_partitions().
@@ -97,7 +94,6 @@ struct partition_meta_info { /* 2 is unused (used to be GENHD_FL_DRIVERFS) */ /* 4 is unused (used to be GENHD_FL_MEDIA_CHANGE_NOTIFY) */ #define GENHD_FL_CD 0x0008 -#define GENHD_FL_UP 0x0010 #define GENHD_FL_SUPPRESS_PARTITION_INFO 0x0020 #define GENHD_FL_EXT_DEVT 0x0040 #define GENHD_FL_NATIVE_CAPACITY 0x0080
@@ -175,6 +171,11 @@ struct gendisk { u64 diskseq; }; +static inline bool disk_live(struct gendisk *disk) +{ + return !inode_unhashed(disk->part0->bd_inode); +} + /* * The gendisk is refcounted by the part0 block_device, and the bd_device * therein is also used for device model presentation in sysfs.
--
2.30.2