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Diffstat (limited to 'fs/btrfs/volumes.c')
-rw-r--r--fs/btrfs/volumes.c61
1 files changed, 35 insertions, 26 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index aa25fa335d3e..bcfef75b97da 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -768,8 +768,11 @@ static noinline struct btrfs_device *device_list_add(const char *path,
BTRFS_SUPER_FLAG_CHANGING_FSID_V2);
error = lookup_bdev(path, &path_devt);
- if (error)
+ if (error) {
+ btrfs_err(NULL, "failed to lookup block device for path %s: %d",
+ path, error);
return ERR_PTR(error);
+ }
if (fsid_change_in_progress) {
if (!has_metadata_uuid)
@@ -836,6 +839,9 @@ static noinline struct btrfs_device *device_list_add(const char *path,
unsigned int nofs_flag;
if (fs_devices->opened) {
+ btrfs_err(NULL,
+ "device %s belongs to fsid %pU, and the fs is already mounted",
+ path, fs_devices->fsid);
mutex_unlock(&fs_devices->device_list_mutex);
return ERR_PTR(-EBUSY);
}
@@ -905,6 +911,9 @@ static noinline struct btrfs_device *device_list_add(const char *path,
* generation are equal.
*/
mutex_unlock(&fs_devices->device_list_mutex);
+ btrfs_err(NULL,
+"device %s already registered with a higher generation, found %llu expect %llu",
+ path, found_transid, device->generation);
return ERR_PTR(-EEXIST);
}
@@ -2005,42 +2014,42 @@ static u64 btrfs_num_devices(struct btrfs_fs_info *fs_info)
return num_devices;
}
+static void btrfs_scratch_superblock(struct btrfs_fs_info *fs_info,
+ struct block_device *bdev, int copy_num)
+{
+ struct btrfs_super_block *disk_super;
+ const size_t len = sizeof(disk_super->magic);
+ const u64 bytenr = btrfs_sb_offset(copy_num);
+ int ret;
+
+ disk_super = btrfs_read_disk_super(bdev, bytenr, bytenr);
+ if (IS_ERR(disk_super))
+ return;
+
+ memset(&disk_super->magic, 0, len);
+ folio_mark_dirty(virt_to_folio(disk_super));
+ btrfs_release_disk_super(disk_super);
+
+ ret = sync_blockdev_range(bdev, bytenr, bytenr + len - 1);
+ if (ret)
+ btrfs_warn(fs_info, "error clearing superblock number %d (%d)",
+ copy_num, ret);
+}
+
void btrfs_scratch_superblocks(struct btrfs_fs_info *fs_info,
struct block_device *bdev,
const char *device_path)
{
- struct btrfs_super_block *disk_super;
int copy_num;
if (!bdev)
return;
for (copy_num = 0; copy_num < BTRFS_SUPER_MIRROR_MAX; copy_num++) {
- struct page *page;
- int ret;
-
- disk_super = btrfs_read_dev_one_super(bdev, copy_num, false);
- if (IS_ERR(disk_super))
- continue;
-
- if (bdev_is_zoned(bdev)) {
+ if (bdev_is_zoned(bdev))
btrfs_reset_sb_log_zones(bdev, copy_num);
- continue;
- }
-
- memset(&disk_super->magic, 0, sizeof(disk_super->magic));
-
- page = virt_to_page(disk_super);
- set_page_dirty(page);
- lock_page(page);
- /* write_on_page() unlocks the page */
- ret = write_one_page(page);
- if (ret)
- btrfs_warn(fs_info,
- "error clearing superblock number %d (%d)",
- copy_num, ret);
- btrfs_release_disk_super(disk_super);
-
+ else
+ btrfs_scratch_superblock(fs_info, bdev, copy_num);
}
/* Notify udev that device has changed */