From: Jan Kara jack@suse.cz
mainline inclusion from mainline-v6.7-rc1 commit 75e27d373425c349954c3770bee659a1bbdb3cc0 category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I8KPBR CVE: NA
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?h...
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Convert drdb to use bdev_open_by_path().
CC: drbd-dev@lists.linbit.com Acked-by: Christoph Hellwig hch@lst.de Acked-by: Christian Brauner brauner@kernel.org Signed-off-by: Jan Kara jack@suse.cz Link: https://lore.kernel.org/r/20230927093442.25915-4-jack@suse.cz Signed-off-by: Christian Brauner brauner@kernel.org Signed-off-by: Li Lingfeng lilingfeng3@huawei.com --- drivers/block/drbd/drbd_int.h | 2 ++ drivers/block/drbd/drbd_nl.c | 65 +++++++++++++++++------------------ 2 files changed, 34 insertions(+), 33 deletions(-)
diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h index a30a5ed811be..f017e917612b 100644 --- a/drivers/block/drbd/drbd_int.h +++ b/drivers/block/drbd/drbd_int.h @@ -524,7 +524,9 @@ struct drbd_md {
struct drbd_backing_dev { struct block_device *backing_bdev; + struct bdev_handle *backing_bdev_handle; struct block_device *md_bdev; + struct bdev_handle *md_bdev_handle; struct drbd_md md; struct disk_conf *disk_conf; /* RCU, for updates: resource->conf_update */ sector_t known_size; /* last known size of that backing device */ diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c index d3538bd83fb3..43747a1aae43 100644 --- a/drivers/block/drbd/drbd_nl.c +++ b/drivers/block/drbd/drbd_nl.c @@ -82,7 +82,7 @@ static atomic_t notify_genl_seq = ATOMIC_INIT(2); /* two. */
DEFINE_MUTEX(notification_mutex);
-/* used blkdev_get_by_path, to claim our meta data device(s) */ +/* used bdev_open_by_path, to claim our meta data device(s) */ static char *drbd_m_holder = "Hands off! this is DRBD's meta data device.";
static void drbd_adm_send_reply(struct sk_buff *skb, struct genl_info *info) @@ -1635,43 +1635,45 @@ int drbd_adm_disk_opts(struct sk_buff *skb, struct genl_info *info) return 0; }
-static struct block_device *open_backing_dev(struct drbd_device *device, +static struct bdev_handle *open_backing_dev(struct drbd_device *device, const char *bdev_path, void *claim_ptr, bool do_bd_link) { - struct block_device *bdev; + struct bdev_handle *handle; int err = 0;
- bdev = blkdev_get_by_path(bdev_path, BLK_OPEN_READ | BLK_OPEN_WRITE, - claim_ptr, NULL); - if (IS_ERR(bdev)) { + handle = bdev_open_by_path(bdev_path, BLK_OPEN_READ | BLK_OPEN_WRITE, + claim_ptr, NULL); + if (IS_ERR(handle)) { drbd_err(device, "open("%s") failed with %ld\n", - bdev_path, PTR_ERR(bdev)); - return bdev; + bdev_path, PTR_ERR(handle)); + return handle; }
if (!do_bd_link) - return bdev; + return handle;
- err = bd_link_disk_holder(bdev, device->vdisk); + err = bd_link_disk_holder(handle->bdev, device->vdisk); if (err) { - blkdev_put(bdev, claim_ptr); + bdev_release(handle); drbd_err(device, "bd_link_disk_holder("%s", ...) failed with %d\n", bdev_path, err); - bdev = ERR_PTR(err); + handle = ERR_PTR(err); } - return bdev; + return handle; }
static int open_backing_devices(struct drbd_device *device, struct disk_conf *new_disk_conf, struct drbd_backing_dev *nbc) { - struct block_device *bdev; + struct bdev_handle *handle;
- bdev = open_backing_dev(device, new_disk_conf->backing_dev, device, true); - if (IS_ERR(bdev)) + handle = open_backing_dev(device, new_disk_conf->backing_dev, device, + true); + if (IS_ERR(handle)) return ERR_OPEN_DISK; - nbc->backing_bdev = bdev; + nbc->backing_bdev = handle->bdev; + nbc->backing_bdev_handle = handle;
/* * meta_dev_idx >= 0: external fixed size, possibly multiple @@ -1681,7 +1683,7 @@ static int open_backing_devices(struct drbd_device *device, * should check it for you already; but if you don't, or * someone fooled it, we need to double check here) */ - bdev = open_backing_dev(device, new_disk_conf->meta_dev, + handle = open_backing_dev(device, new_disk_conf->meta_dev, /* claim ptr: device, if claimed exclusively; shared drbd_m_holder, * if potentially shared with other drbd minors */ (new_disk_conf->meta_dev_idx < 0) ? (void*)device : (void*)drbd_m_holder, @@ -1689,20 +1691,21 @@ static int open_backing_devices(struct drbd_device *device, * as would happen with internal metadata. */ (new_disk_conf->meta_dev_idx != DRBD_MD_INDEX_FLEX_INT && new_disk_conf->meta_dev_idx != DRBD_MD_INDEX_INTERNAL)); - if (IS_ERR(bdev)) + if (IS_ERR(handle)) return ERR_OPEN_MD_DISK; - nbc->md_bdev = bdev; + nbc->md_bdev = handle->bdev; + nbc->md_bdev_handle = handle; return NO_ERROR; }
-static void close_backing_dev(struct drbd_device *device, struct block_device *bdev, - void *claim_ptr, bool do_bd_unlink) +static void close_backing_dev(struct drbd_device *device, + struct bdev_handle *handle, bool do_bd_unlink) { - if (!bdev) + if (!handle) return; if (do_bd_unlink) - bd_unlink_disk_holder(bdev, device->vdisk); - blkdev_put(bdev, claim_ptr); + bd_unlink_disk_holder(handle->bdev, device->vdisk); + bdev_release(handle); }
void drbd_backing_dev_free(struct drbd_device *device, struct drbd_backing_dev *ldev) @@ -1710,11 +1713,9 @@ void drbd_backing_dev_free(struct drbd_device *device, struct drbd_backing_dev * if (ldev == NULL) return;
- close_backing_dev(device, ldev->md_bdev, - ldev->md.meta_dev_idx < 0 ? - (void *)device : (void *)drbd_m_holder, + close_backing_dev(device, ldev->md_bdev_handle, ldev->md_bdev != ldev->backing_bdev); - close_backing_dev(device, ldev->backing_bdev, device, true); + close_backing_dev(device, ldev->backing_bdev_handle, true);
kfree(ldev->disk_conf); kfree(ldev); @@ -2130,11 +2131,9 @@ int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info) fail: conn_reconfig_done(connection); if (nbc) { - close_backing_dev(device, nbc->md_bdev, - nbc->disk_conf->meta_dev_idx < 0 ? - (void *)device : (void *)drbd_m_holder, + close_backing_dev(device, nbc->md_bdev_handle, nbc->md_bdev != nbc->backing_bdev); - close_backing_dev(device, nbc->backing_bdev, device, true); + close_backing_dev(device, nbc->backing_bdev_handle, true); kfree(nbc); } kfree(new_disk_conf);